diff --git a/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/FileMappingProvider.java b/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/FileMappingProvider.java
index 5a03045..76350e4 100644
--- a/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/FileMappingProvider.java
+++ b/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/FileMappingProvider.java
@@ -3,9 +3,9 @@
 import java.util.Hashtable;
 import java.util.Map;
 
-import edu.uci.ics.hyracks.storage.common.file.IFileMappingProvider;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
-public class FileMappingProvider implements IFileMappingProvider {				
+public class FileMappingProvider implements IFileMapProvider {				
 	
 	private static final long serialVersionUID = 1L;
 	private int nextFileId = 0;
diff --git a/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/FileMappingProviderProvider.java b/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/FileMappingProviderProvider.java
index 4f2c8f4..1738d81 100644
--- a/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/FileMappingProviderProvider.java
+++ b/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/FileMappingProviderProvider.java
@@ -1,7 +1,7 @@
 package edu.uci.ics.hyracks.examples.btree.helper;
 
 import edu.uci.ics.hyracks.storage.am.btree.dataflow.IFileMappingProviderProvider;
-import edu.uci.ics.hyracks.storage.common.file.IFileMappingProvider;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 public class FileMappingProviderProvider implements IFileMappingProviderProvider {
 	private static final long serialVersionUID = 1L;
@@ -9,7 +9,7 @@
 	public static final IFileMappingProviderProvider INSTANCE = new FileMappingProviderProvider();
 	
 	@Override
-	public IFileMappingProvider getFileMappingProvider() {
+	public IFileMapProvider getFileMappingProvider() {
 		return RuntimeContext.getInstance().getFileMappingProvider();
 	}
 }
diff --git a/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/RuntimeContext.java b/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/RuntimeContext.java
index d542ed9..fd8e58d 100644
--- a/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/RuntimeContext.java
+++ b/hyracks-examples/btree-example/btreehelper/src/main/java/edu/uci/ics/hyracks/examples/btree/helper/RuntimeContext.java
@@ -7,7 +7,7 @@
 import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.file.FileManager;
-import edu.uci.ics.hyracks.storage.common.file.IFileMappingProvider;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 public class RuntimeContext {
     private static RuntimeContext INSTANCE;
@@ -15,7 +15,7 @@
     private FileManager fileManager;
     private IBufferCache bufferCache;
     private BTreeRegistry btreeRegistry;
-    private IFileMappingProvider fileMappingProvider;
+    private IFileMapProvider fileMappingProvider;
     
     private RuntimeContext() {
     }
@@ -64,7 +64,7 @@
         return btreeRegistry;
     }
     
-    public IFileMappingProvider getFileMappingProvider() {
+    public IFileMapProvider getFileMappingProvider() {
     	return fileMappingProvider;
     }
 }
\ No newline at end of file
diff --git a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeOperatorsTest.java b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeOperatorsTest.java
index d10d622..3fe3012 100644
--- a/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeOperatorsTest.java
+++ b/hyracks-examples/hyracks-integration-tests/src/test/java/edu/uci/ics/hyracks/tests/btree/BTreeOperatorsTest.java
@@ -72,7 +72,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.impls.RangeSearchCursor;
 import edu.uci.ics.hyracks.storage.am.btree.tuples.TypeAwareTupleWriterFactory;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.file.FileInfo;
+import edu.uci.ics.hyracks.storage.common.file.FileHandle;
 import edu.uci.ics.hyracks.storage.common.file.FileManager;
 import edu.uci.ics.hyracks.tests.integration.AbstractIntegrationTest;
 
@@ -350,7 +350,7 @@
         int fileIdA = fileMappingProviderProvider.getFileMappingProvider().mapNameToFileId("/tmp/btreetestA.ix", true);
         File fA = new File("/tmp/btreetestA.ix");
         RandomAccessFile rafA = new RandomAccessFile(fA, "rw");                
-        FileInfo fiA = new FileInfo(fileIdA, rafA);
+        FileHandle fiA = new FileHandle(fileIdA, rafA);
         fileManager.registerFile(fiA);
         BTree btreeA = new BTree(bufferCache, primaryInteriorFrameFactory, primaryLeafFrameFactory, primaryCmp);		
 		btreeA.create(fileIdA, primaryLeafFrameFactory.getFrame(), new MetaDataFrame());
@@ -361,7 +361,7 @@
         int fileIdB = fileMappingProviderProvider.getFileMappingProvider().mapNameToFileId("/tmp/btreetestB.ix", true);
         File fB = new File("/tmp/btreetestB.ix");
         RandomAccessFile rafB = new RandomAccessFile(fB, "rw");   
-        FileInfo fiB = new FileInfo(fileIdB, rafB);
+        FileHandle fiB = new FileHandle(fileIdB, rafB);
         fileManager.registerFile(fiB);
         BTree btreeB = new BTree(bufferCache, secondaryInteriorFrameFactory, secondaryLeafFrameFactory, secondaryCmp);		
 		btreeB.create(fileIdB, secondaryLeafFrameFactory.getFrame(), new MetaDataFrame());
@@ -372,7 +372,7 @@
         int fileIdC = fileMappingProviderProvider.getFileMappingProvider().mapNameToFileId("/tmp/btreetestC.ix", true);
         File fC = new File("/tmp/btreetestC.ix");
         RandomAccessFile rafC = new RandomAccessFile(fC, "rw");                
-        FileInfo fiC = new FileInfo(fileIdC, rafC);
+        FileHandle fiC = new FileHandle(fileIdC, rafC);
         fileManager.registerFile(fiC);
         BTree btreeC = new BTree(bufferCache, secondaryInteriorFrameFactory, secondaryLeafFrameFactory, secondaryCmp);	
 		btreeC.create(fileIdC, secondaryLeafFrameFactory.getFrame(), new MetaDataFrame());
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/DummySMI.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/DummySMI.java
new file mode 100644
index 0000000..cf36a70
--- /dev/null
+++ b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/api/DummySMI.java
@@ -0,0 +1,104 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package edu.uci.ics.hyracks.storage.am.btree.api;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
+import edu.uci.ics.hyracks.storage.common.buffercache.BufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ClockPageReplacementStrategy;
+import edu.uci.ics.hyracks.storage.common.buffercache.HeapBufferAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
+import edu.uci.ics.hyracks.storage.common.buffercache.ICacheMemoryAllocator;
+import edu.uci.ics.hyracks.storage.common.buffercache.IPageReplacementStrategy;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapManager;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
+
+public class DummySMI implements IStorageManagerInterface {
+
+    private static final long serialVersionUID = 1L;
+
+    private transient IBufferCache bufferCache = null;
+    private transient IFileMapManager fmManager;
+    private static final int PAGE_SIZE = 8192;
+    private static final int NUM_PAGES = 40;
+
+    public DummySMI() {
+    }
+
+    @Override
+    public synchronized IBufferCache getBufferCache() {
+        if (bufferCache == null) {
+            ICacheMemoryAllocator allocator = new HeapBufferAllocator();
+            IPageReplacementStrategy prs = new ClockPageReplacementStrategy();
+            fmManager = new IFileMapManager() {
+                private Map<Integer, String> id2nameMap = new HashMap<Integer, String>();
+                private Map<String, Integer> name2IdMap = new HashMap<String, Integer>();
+                private int idCounter = 0;
+
+                @Override
+                public String lookupFileName(int fileId) throws HyracksDataException {
+                    String fName = id2nameMap.get(fileId);
+                    if (fName == null) {
+                        throw new HyracksDataException("No mapping found for id: " + fileId);
+                    }
+                    return fName;
+                }
+
+                @Override
+                public int lookupFileId(String fileName) throws HyracksDataException {
+                    Integer fileId = name2IdMap.get(fileName);
+                    if (fileId == null) {
+                        throw new HyracksDataException("No mapping found for name: " + fileName);
+                    }
+                    return fileId;
+                }
+
+                @Override
+                public boolean isMapped(String fileName) {
+                    return name2IdMap.containsKey(fileName);
+                }
+
+                @Override
+                public boolean isMapped(int fileId) {
+                    return id2nameMap.containsKey(fileId);
+                }
+
+                @Override
+                public void unregisterFile(int fileId) throws HyracksDataException {
+                    String fileName = id2nameMap.remove(fileId);
+                    name2IdMap.remove(fileName);
+                }
+
+                @Override
+                public void registerFile(String fileName) throws HyracksDataException {
+                    Integer fileId = idCounter++;
+                    id2nameMap.put(fileId, fileName);
+                    name2IdMap.put(fileName, fileId);
+                }
+            };
+            bufferCache = new BufferCache(allocator, prs, fmManager, PAGE_SIZE, NUM_PAGES);
+        }
+
+        return bufferCache;
+    }
+
+    public IFileMapProvider getFileMapProvider() {
+        return fmManager;
+    }
+}
\ No newline at end of file
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/AbstractBTreeOperatorDescriptor.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/AbstractBTreeOperatorDescriptor.java
index 2ceb58a..3f42e8e 100644
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/AbstractBTreeOperatorDescriptor.java
+++ b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/AbstractBTreeOperatorDescriptor.java
@@ -23,71 +23,69 @@
 import edu.uci.ics.hyracks.dataflow.std.file.IFileSplitProvider;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeInteriorFrameFactory;
 import edu.uci.ics.hyracks.storage.am.btree.api.IBTreeLeafFrameFactory;
+import edu.uci.ics.hyracks.storage.common.IStorageManagerInterface;
 
 public abstract class AbstractBTreeOperatorDescriptor extends AbstractSingleActivityOperatorDescriptor {
-	
-	private static final long serialVersionUID = 1L;
-	
-	protected final IFileMappingProviderProvider fileMappingProviderProvider;
-	
-	protected final IFileSplitProvider fileSplitProvider;
-	
-	protected final IBinaryComparatorFactory[] comparatorFactories;	
-	
-	protected final IBTreeInteriorFrameFactory interiorFrameFactory;
-	protected final IBTreeLeafFrameFactory leafFrameFactory;
-	
-	protected final IBufferCacheProvider bufferCacheProvider;
-	protected final IBTreeRegistryProvider btreeRegistryProvider;		
-	
-	protected final ITypeTrait[] typeTraits;
-	
-	public AbstractBTreeOperatorDescriptor(JobSpecification spec, int inputArity, int outputArity, RecordDescriptor recDesc, IBufferCacheProvider bufferCacheProvider, IBTreeRegistryProvider btreeRegistryProvider, IFileSplitProvider fileSplitProvider, IFileMappingProviderProvider fileMappingProviderProvider, IBTreeInteriorFrameFactory interiorFactory, IBTreeLeafFrameFactory leafFactory, ITypeTrait[] typeTraits, IBinaryComparatorFactory[] comparatorFactories) {
+
+    private static final long serialVersionUID = 1L;
+
+    protected final IFileSplitProvider fileSplitProvider;
+
+    protected final IBinaryComparatorFactory[] comparatorFactories;
+
+    protected final IBTreeInteriorFrameFactory interiorFrameFactory;
+    protected final IBTreeLeafFrameFactory leafFrameFactory;
+
+    protected final IStorageManagerInterface smi;
+    protected final IBTreeRegistryProvider btreeRegistryProvider;
+
+    protected final ITypeTrait[] typeTraits;
+
+    public AbstractBTreeOperatorDescriptor(JobSpecification spec, int inputArity, int outputArity,
+            RecordDescriptor recDesc, IStorageManagerInterface smi, IBTreeRegistryProvider btreeRegistryProvider,
+            IFileSplitProvider fileSplitProvider, IBTreeInteriorFrameFactory interiorFactory,
+            IBTreeLeafFrameFactory leafFactory, ITypeTrait[] typeTraits, IBinaryComparatorFactory[] comparatorFactories) {
         super(spec, inputArity, outputArity);
         this.fileSplitProvider = fileSplitProvider;
-        this.fileMappingProviderProvider = fileMappingProviderProvider;
-        this.bufferCacheProvider = bufferCacheProvider;
-        this.btreeRegistryProvider = btreeRegistryProvider;        
+        this.smi = smi;
+        this.btreeRegistryProvider = btreeRegistryProvider;
         this.interiorFrameFactory = interiorFactory;
         this.leafFrameFactory = leafFactory;
         this.typeTraits = typeTraits;
         this.comparatorFactories = comparatorFactories;
-        if(outputArity > 0) recordDescriptors[0] = recDesc;           
+        if (outputArity > 0)
+            recordDescriptors[0] = recDesc;
     }
 
-	public IFileSplitProvider getFileSplitProvider() {
-		return fileSplitProvider;
-	}
+    public IFileSplitProvider getFileSplitProvider() {
+        return fileSplitProvider;
+    }
 
-	public IFileMappingProviderProvider getFileMappingProviderProvider() {
-		return fileMappingProviderProvider;
-	}
+    public IBinaryComparatorFactory[] getComparatorFactories() {
+        return comparatorFactories;
+    }
 
-	public IBinaryComparatorFactory[] getComparatorFactories() {
-		return comparatorFactories;
-	}
-		
-	public ITypeTrait[] getTypeTraits() {
-		return typeTraits;
-	}
-	
-	public IBTreeInteriorFrameFactory getInteriorFactory() {
-		return interiorFrameFactory;
-	}
+    public ITypeTrait[] getTypeTraits() {
+        return typeTraits;
+    }
 
-	public IBTreeLeafFrameFactory getLeafFactory() {
-		return leafFrameFactory;
-	}
+    public IBTreeInteriorFrameFactory getInteriorFactory() {
+        return interiorFrameFactory;
+    }
 
-	public IBufferCacheProvider getBufferCacheProvider() {
-		return bufferCacheProvider;
-	}
+    public IBTreeLeafFrameFactory getLeafFactory() {
+        return leafFrameFactory;
+    }
 
-	public IBTreeRegistryProvider getBtreeRegistryProvider() {
-		return btreeRegistryProvider;
-	}
-	
-	public RecordDescriptor getRecordDescriptor() {
-		return recordDescriptors[0];    
-	}
+    public IStorageManagerInterface getSMI() {
+        return smi;
+    }
+
+    public IBTreeRegistryProvider getBtreeRegistryProvider() {
+        return btreeRegistryProvider;
+    }
+
+    public RecordDescriptor getRecordDescriptor() {
+        return recordDescriptors[0];
+    }
 }
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeOpHelper.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeOpHelper.java
index 681eb9d..4ca44e8 100644
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeOpHelper.java
+++ b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BTreeOpHelper.java
@@ -28,8 +28,8 @@
 import edu.uci.ics.hyracks.storage.am.btree.impls.BTree;
 import edu.uci.ics.hyracks.storage.am.btree.impls.MultiComparator;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.file.FileInfo;
-import edu.uci.ics.hyracks.storage.common.file.FileManager;
+import edu.uci.ics.hyracks.storage.common.file.FileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
 final class BTreeOpHelper {
     
@@ -60,9 +60,7 @@
     
     void init() throws HyracksDataException {
     	
-    	IBufferCache bufferCache = opDesc.getBufferCacheProvider().getBufferCache();
-        FileManager fileManager = opDesc.getBufferCacheProvider().getFileManager();
-        IFileMappingProviderProvider fileMappingProviderProvider = opDesc.getFileMappingProviderProvider();               
+    	IBufferCache bufferCache = opDesc.getSMI().getBufferCache();
         IFileSplitProvider fileSplitProvider = opDesc.getFileSplitProvider();
         
         File f = fileSplitProvider.getFileSplits()[partition].getLocalFile();
@@ -78,7 +76,7 @@
 		}
         
         String fileName = f.getAbsolutePath();
-        Integer fileId = fileMappingProviderProvider.getFileMappingProvider().getFileId(fileName);        
+        Integer fileId = opDesc.getSMI().getFileMapProvider().lookupFileId(fileName);        
         
         switch(mode) {
     	
@@ -116,7 +114,7 @@
     	btreeFileId = fileId;
     	
         if(mode == BTreeMode.CREATE_BTREE || mode == BTreeMode.ENLIST_BTREE) {
-        	FileInfo fi = new FileInfo(btreeFileId, raf);
+        	FileHandle fi = new FileHandle(btreeFileId, raf);
         	fileManager.registerFile(fi);
         }
         
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BufferCacheProvider.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BufferCacheProvider.java
deleted file mode 100644
index 289d99a..0000000
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/BufferCacheProvider.java
+++ /dev/null
@@ -1,70 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package edu.uci.ics.hyracks.storage.am.btree.dataflow;
-
-import java.nio.ByteBuffer;
-
-import edu.uci.ics.hyracks.storage.common.buffercache.BufferCache;
-import edu.uci.ics.hyracks.storage.common.buffercache.ClockPageReplacementStrategy;
-import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.buffercache.ICacheMemoryAllocator;
-import edu.uci.ics.hyracks.storage.common.buffercache.IPageReplacementStrategy;
-import edu.uci.ics.hyracks.storage.common.file.FileManager;
-
-public class BufferCacheProvider implements IBufferCacheProvider {
-		
-	private static final long serialVersionUID = 1L;
-	
-	private static IBufferCache bufferCache = null;	
-	private static FileManager fileManager = null;
-	private static final int PAGE_SIZE = 8192;
-    private static final int NUM_PAGES = 40;
-	
-    public void reset() {
-    	bufferCache = null;
-    	fileManager = null;
-    }
-    
-	@Override
-	public synchronized IBufferCache getBufferCache() {
-		
-		if(bufferCache == null) {
-			if(fileManager == null) fileManager = new FileManager();			
-	        ICacheMemoryAllocator allocator = new BufferAllocator();
-	        IPageReplacementStrategy prs = new ClockPageReplacementStrategy();
-	        bufferCache = new BufferCache(allocator, prs, fileManager, PAGE_SIZE, NUM_PAGES);
-		}
-		
-		return bufferCache;
-	}
-	
-	@Override
-	public synchronized FileManager getFileManager() {
-		if(fileManager == null) fileManager = new FileManager();
-		return fileManager;
-	}	
-	
-	public class BufferAllocator implements ICacheMemoryAllocator {
-        @Override
-        public ByteBuffer[] allocate(int pageSize, int numPages) {
-            ByteBuffer[] buffers = new ByteBuffer[numPages];
-            for (int i = 0; i < numPages; ++i) {
-                buffers[i] = ByteBuffer.allocate(pageSize);
-            }
-            return buffers;
-        }
-    }	
-}
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/FileMappingProvider.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/FileMappingProvider.java
deleted file mode 100644
index f4a68bf..0000000
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/FileMappingProvider.java
+++ /dev/null
@@ -1,41 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.btree.dataflow;
-
-import java.util.Hashtable;
-import java.util.Map;
-
-import edu.uci.ics.hyracks.storage.common.file.IFileMappingProvider;
-
-public class FileMappingProvider implements IFileMappingProvider {
-			
-	private static final long serialVersionUID = 1L;
-	private int nextFileId = 0;
-	private Map<String, Integer> map = new Hashtable<String, Integer>();
-		
-	@Override
-	public synchronized Integer mapNameToFileId(String name, boolean create) {		
-		Integer val = map.get(name);			
-		if(create) {
-			if(val == null) {
-				int ret = nextFileId;
-				map.put(name, nextFileId++);
-				return ret;
-			}
-			else {
-				return null; // create requested but value already exists				
-			}
-		}
-		else {
-			return val; // just return value
-		}			
-	}
-
-	@Override
-	public void unmapName(String name) {
-		map.remove(name);
-	}
-
-	@Override
-	public Integer getFileId(String name) {
-		return map.get(name);
-	}
-}
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/FileMappingProviderProvider.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/FileMappingProviderProvider.java
deleted file mode 100644
index edf1898..0000000
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/FileMappingProviderProvider.java
+++ /dev/null
@@ -1,17 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.btree.dataflow;
-
-import edu.uci.ics.hyracks.storage.common.file.IFileMappingProvider;
-
-public class FileMappingProviderProvider implements IFileMappingProviderProvider {
-	private static final long serialVersionUID = 1L;
-	
-	private static IFileMappingProvider fileMappingProvider = null;
-	
-	@Override
-	public IFileMappingProvider getFileMappingProvider() {
-		if(fileMappingProvider == null) {
-			fileMappingProvider = new FileMappingProvider();
-		}		
-		return fileMappingProvider;
-	}
-}
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/IFileMappingProviderProvider.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/IFileMappingProviderProvider.java
deleted file mode 100644
index b88e058..0000000
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/IFileMappingProviderProvider.java
+++ /dev/null
@@ -1,9 +0,0 @@
-package edu.uci.ics.hyracks.storage.am.btree.dataflow;
-
-import java.io.Serializable;
-
-import edu.uci.ics.hyracks.storage.common.file.IFileMappingProvider;
-
-public interface IFileMappingProviderProvider extends Serializable {
-	public IFileMappingProvider getFileMappingProvider();
-}
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTree.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTree.java
index de0122d..ef1421b 100644
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTree.java
+++ b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/BTree.java
@@ -35,7 +35,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.frames.NSMInteriorFrame;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
-import edu.uci.ics.hyracks.storage.common.file.FileInfo;
+import edu.uci.ics.hyracks.storage.common.file.FileHandle;
 
 public class BTree {
 	
@@ -113,7 +113,7 @@
     		if(created) return;    		    		
     		
     		// initialize meta data page
-    		ICachedPage metaNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, metaDataPage), false);
+    		ICachedPage metaNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, metaDataPage), false);
     		pins++;
     		
     		metaNode.acquireWriteLatch();
@@ -130,7 +130,7 @@
     		}
 
     		// initialize root page
-    		ICachedPage rootNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, rootPage), true);
+    		ICachedPage rootNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, rootPage), true);
     		pins++;
 
     		rootNode.acquireWriteLatch();
@@ -162,7 +162,7 @@
     }
 
     private int getFreePage(IBTreeMetaDataFrame metaFrame) throws Exception {
-        ICachedPage metaNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, metaDataPage), false);
+        ICachedPage metaNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, metaDataPage), false);
         pins++;
         
         metaNode.acquireWriteLatch();
@@ -175,7 +175,7 @@
             if (freePage < 0) { // no free page entry on this page
                 int nextPage = metaFrame.getNextPage();
                 if (nextPage > 0) { // sibling may have free pages
-                    ICachedPage nextNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, nextPage), false);
+                    ICachedPage nextNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, nextPage), false);
                     pins++;
                     
                     nextNode.acquireWriteLatch();
@@ -237,7 +237,7 @@
         // root page is special, don't add it to free pages
         if (freePage == rootPage) return;
         
-        ICachedPage metaNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, metaDataPage), false);
+        ICachedPage metaNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, metaDataPage), false);
         pins++;
         
         metaNode.acquireWriteLatch();
@@ -256,7 +256,7 @@
                     throw new Exception("Inconsistent Meta Page State. It has no space, but it also has no entries.");
                 }
                 
-                ICachedPage newNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, newPage), false);
+                ICachedPage newNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, newPage), false);
                 pins++;
                 
                 newNode.acquireWriteLatch();
@@ -293,7 +293,7 @@
     }
     
     public int getMaxPage(IBTreeMetaDataFrame metaFrame) throws HyracksDataException {
-    	ICachedPage metaNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, metaDataPage), false);
+    	ICachedPage metaNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, metaDataPage), false);
 		pins++;
 		
 		metaNode.acquireWriteLatch();
@@ -319,7 +319,7 @@
     public void printTree(int pageId, ICachedPage parent, boolean unpin, IBTreeLeafFrame leafFrame,
             IBTreeInteriorFrame interiorFrame, ISerializerDeserializer[] fields) throws Exception {
         
-        ICachedPage node = bufferCache.pin(FileInfo.getDiskPageId(fileId, pageId), false);
+        ICachedPage node = bufferCache.pin(FileHandle.getDiskPageId(fileId, pageId), false);
         pins++;
         node.acquireReadLatch();
         readLatchesAcquired++;
@@ -378,7 +378,7 @@
         int currentPageId = rootPage + 1;
         int maxPageId = -1;
         
-        ICachedPage metaNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, metaDataPage), false);
+        ICachedPage metaNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, metaDataPage), false);
         pins++;
         
         metaNode.acquireReadLatch();
@@ -395,7 +395,7 @@
             unpins++;
         }
         
-        ICachedPage page = bufferCache.pin(FileInfo.getDiskPageId(fileId, currentPageId), false);
+        ICachedPage page = bufferCache.pin(FileHandle.getDiskPageId(fileId, currentPageId), false);
         page.acquireReadLatch();
         cursor.setBufferCache(bufferCache);
         cursor.setFileId(fileId);
@@ -435,7 +435,7 @@
         ICachedPage originalPage = ctx.interiorFrame.getPage();
         for(int i = 0; i < ctx.smPages.size(); i++) {
             int pageId = ctx.smPages.get(i);
-        	ICachedPage smPage = bufferCache.pin(FileInfo.getDiskPageId(fileId, pageId), false);
+        	ICachedPage smPage = bufferCache.pin(FileHandle.getDiskPageId(fileId, pageId), false);
             pins++;
             smPage.acquireWriteLatch(); // TODO: would like to set page dirty without latching
             writeLatchesAcquired++;
@@ -463,18 +463,18 @@
         currentLevel++;
 
         // make sure the root is always at the same level
-        ICachedPage leftNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, ctx.splitKey.getLeftPage()), false);
+        ICachedPage leftNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, ctx.splitKey.getLeftPage()), false);
         pins++;
         leftNode.acquireWriteLatch(); // TODO: think about whether latching is really required        
         writeLatchesAcquired++;
         try {
-            ICachedPage rightNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, ctx.splitKey.getRightPage()), false);
+            ICachedPage rightNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, ctx.splitKey.getRightPage()), false);
             pins++;
             rightNode.acquireWriteLatch(); // TODO: think about whether latching is really required
             writeLatchesAcquired++;
             try {
                 int newLeftId = getFreePage(ctx.metaFrame);
-                ICachedPage newLeftNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, newLeftId), true);
+                ICachedPage newLeftNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, newLeftId), true);
                 pins++;
                 newLeftNode.acquireWriteLatch(); // TODO: think about whether latching is really required
                 writeLatchesAcquired++;
@@ -596,7 +596,7 @@
     			int rightSiblingPageId = ctx.leafFrame.getNextLeaf();
     			ICachedPage rightSibling = null;
     			if (rightSiblingPageId > 0) {
-    				rightSibling = bufferCache.pin(FileInfo.getDiskPageId(fileId, rightSiblingPageId), false);
+    				rightSibling = bufferCache.pin(FileHandle.getDiskPageId(fileId, rightSiblingPageId), false);
     				pins++;
     			}
 
@@ -607,7 +607,7 @@
     			try {
 
     				int rightPageId = getFreePage(ctx.metaFrame);
-    				ICachedPage rightNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, rightPageId), true);
+    				ICachedPage rightNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, rightPageId), true);
     				pins++;
     				rightNode.acquireWriteLatch();
     				writeLatchesAcquired++;
@@ -692,7 +692,7 @@
             case INSUFFICIENT_SPACE: {
                 splitsByLevel[ctx.interiorFrame.getLevel()]++; // debug
                 int rightPageId = getFreePage(ctx.metaFrame);
-                ICachedPage rightNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, rightPageId), true);
+                ICachedPage rightNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, rightPageId), true);
                 pins++;
                 rightNode.acquireWriteLatch();
                 writeLatchesAcquired++;
@@ -774,7 +774,7 @@
 
             // tree is empty, reset level to zero
             if (ctx.splitKey.getBuffer() != null) {
-                ICachedPage rootNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, rootPage), false);
+                ICachedPage rootNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, rootPage), false);
                 pins++;
                 rootNode.acquireWriteLatch();
                 writeLatchesAcquired++;
@@ -812,12 +812,12 @@
             int prevLeaf = ctx.leafFrame.getPrevLeaf();
 
             if (prevLeaf > 0)
-                leftNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, prevLeaf), false);
+                leftNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, prevLeaf), false);
 
             try {
 
                 if (nextLeaf > 0)
-                    rightNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, nextLeaf), false);
+                    rightNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, nextLeaf), false);
 
                 try {
                     treeLatch.writeLock().lock();
@@ -957,7 +957,7 @@
     }
 
     private boolean isConsistent(int pageId, BTreeOpContext ctx) throws Exception {
-        ICachedPage node = bufferCache.pin(FileInfo.getDiskPageId(fileId, pageId), false);
+        ICachedPage node = bufferCache.pin(FileHandle.getDiskPageId(fileId, pageId), false);
         pins++;
         node.acquireReadLatch();
         readLatchesAcquired++;
@@ -975,7 +975,7 @@
     }
 
     private void performOp(int pageId, ICachedPage parent, BTreeOpContext ctx) throws Exception {
-        ICachedPage node = bufferCache.pin(FileInfo.getDiskPageId(fileId, pageId), false);
+        ICachedPage node = bufferCache.pin(FileHandle.getDiskPageId(fileId, pageId), false);
         pins++;
 
         ctx.interiorFrame.setPage(node);
@@ -1034,7 +1034,7 @@
 
                             case BTO_INSERT: {
                                 if (ctx.splitKey.getBuffer() != null) {
-                                    node = bufferCache.pin(FileInfo.getDiskPageId(fileId, pageId), false);
+                                    node = bufferCache.pin(FileHandle.getDiskPageId(fileId, pageId), false);
                                     pins++;
                                     node.acquireWriteLatch();
                                     writeLatchesAcquired++;
@@ -1054,7 +1054,7 @@
 
                             case BTO_DELETE: {
                             	if (ctx.splitKey.getBuffer() != null) {
-                                    node = bufferCache.pin(FileInfo.getDiskPageId(fileId, pageId), false);
+                                    node = bufferCache.pin(FileHandle.getDiskPageId(fileId, pageId), false);
                                     pins++;
                                     node.acquireWriteLatch();
                                     writeLatchesAcquired++;
@@ -1169,7 +1169,7 @@
         	        	
         	NodeFrontier leafFrontier = new NodeFrontier(leafFrame.createTupleReference());
             leafFrontier.pageId = getFreePage(metaFrame);
-            leafFrontier.page = bufferCache.pin(FileInfo.getDiskPageId(fileId, leafFrontier.pageId), bulkNewPage);
+            leafFrontier.page = bufferCache.pin(FileHandle.getDiskPageId(fileId, leafFrontier.pageId), bulkNewPage);
             leafFrontier.page.acquireWriteLatch();
 
             interiorFrame.setPage(leafFrontier.page);
@@ -1192,7 +1192,7 @@
         private void addLevel() throws Exception {
             NodeFrontier frontier = new NodeFrontier(tupleWriter.createTupleReference());
             frontier.pageId = getFreePage(metaFrame);
-            frontier.page = bufferCache.pin(FileInfo.getDiskPageId(fileId, frontier.pageId), bulkNewPage);
+            frontier.page = bufferCache.pin(FileHandle.getDiskPageId(fileId, frontier.pageId), bulkNewPage);
             frontier.page.acquireWriteLatch();
             frontier.lastTuple.setFieldCount(cmp.getKeyFieldCount());
             interiorFrame.setPage(frontier.page);
@@ -1236,7 +1236,7 @@
             ctx.splitKey.setRightPage(frontier.pageId);
             propagateBulk(ctx, level + 1);
 
-            frontier.page = bufferCache.pin(FileInfo.getDiskPageId(fileId, frontier.pageId), bulkNewPage);
+            frontier.page = bufferCache.pin(FileHandle.getDiskPageId(fileId, frontier.pageId), bulkNewPage);
             frontier.page.acquireWriteLatch();
             ctx.interiorFrame.setPage(frontier.page);
             ctx.interiorFrame.initBuffer((byte) level);
@@ -1290,7 +1290,7 @@
             ctx.splitKey.setRightPage(leafFrontier.pageId);
             propagateBulk(ctx, 1);
                        
-            leafFrontier.page = bufferCache.pin(FileInfo.getDiskPageId(fileId, leafFrontier.pageId), bulkNewPage);
+            leafFrontier.page = bufferCache.pin(FileHandle.getDiskPageId(fileId, leafFrontier.pageId), bulkNewPage);
             leafFrontier.page.acquireWriteLatch();
             leafFrame.setPage(leafFrontier.page);
             leafFrame.initBuffer((byte) 0);
@@ -1308,7 +1308,7 @@
     
     public void endBulkLoad(BulkLoadContext ctx) throws Exception {                
         // copy root
-        ICachedPage rootNode = bufferCache.pin(FileInfo.getDiskPageId(fileId, rootPage), bulkNewPage);
+        ICachedPage rootNode = bufferCache.pin(FileHandle.getDiskPageId(fileId, rootPage), bulkNewPage);
         rootNode.acquireWriteLatch();
         try {        
             ICachedPage toBeRoot = ctx.nodeFrontiers.get(ctx.nodeFrontiers.size() - 1).page;
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/DiskOrderScanCursor.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/DiskOrderScanCursor.java
index 0784692..95efa6a 100644
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/DiskOrderScanCursor.java
+++ b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/DiskOrderScanCursor.java
@@ -21,7 +21,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.api.ISearchPredicate;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
-import edu.uci.ics.hyracks.storage.common.file.FileInfo;
+import edu.uci.ics.hyracks.storage.common.file.FileHandle;
 
 public class DiskOrderScanCursor implements IBTreeCursor {
     
@@ -63,7 +63,7 @@
         while( (frame.getLevel() != 0 || skipCurrent) && (currentPageId <= maxPageId) || (frame.getTupleCount() == 0) ) {            
             currentPageId++;
             
-            ICachedPage nextPage = bufferCache.pin(FileInfo.getDiskPageId(fileId, currentPageId), false);
+            ICachedPage nextPage = bufferCache.pin(FileHandle.getDiskPageId(fileId, currentPageId), false);
             nextPage.acquireReadLatch();
             
             page.releaseReadLatch();
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/RangeSearchCursor.java b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/RangeSearchCursor.java
index 9970114..94d60f4 100644
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/RangeSearchCursor.java
+++ b/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/impls/RangeSearchCursor.java
@@ -22,7 +22,7 @@
 import edu.uci.ics.hyracks.storage.am.btree.api.ISearchPredicate;
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
-import edu.uci.ics.hyracks.storage.common.file.FileInfo;
+import edu.uci.ics.hyracks.storage.common.file.FileHandle;
 
 public class RangeSearchCursor implements IBTreeCursor {
 
@@ -70,7 +70,7 @@
 			}
 						
 			if(nextLeafPage >= 0) {			
-				ICachedPage nextLeaf = bufferCache.pin(FileInfo.getDiskPageId(fileId, nextLeafPage), false);
+				ICachedPage nextLeaf = bufferCache.pin(FileHandle.getDiskPageId(fileId, nextLeafPage), false);
 				nextLeaf.acquireReadLatch();
 								
 				page.releaseReadLatch();
diff --git a/hyracks-storage-am-btree/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeFieldPrefixNSMTest.java b/hyracks-storage-am-btree/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeFieldPrefixNSMTest.java
index 0730254..3cfdf46 100644
--- a/hyracks-storage-am-btree/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeFieldPrefixNSMTest.java
+++ b/hyracks-storage-am-btree/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeFieldPrefixNSMTest.java
@@ -53,7 +53,7 @@
 import edu.uci.ics.hyracks.storage.common.buffercache.ICacheMemoryAllocator;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICachedPage;
 import edu.uci.ics.hyracks.storage.common.buffercache.IPageReplacementStrategy;
-import edu.uci.ics.hyracks.storage.common.file.FileInfo;
+import edu.uci.ics.hyracks.storage.common.file.FileHandle;
 import edu.uci.ics.hyracks.storage.common.file.FileManager;
 
 public class BTreeFieldPrefixNSMTest {
@@ -130,7 +130,7 @@
         File f = new File(tmpDir + "/" + "btreetest.bin");
         RandomAccessFile raf = new RandomAccessFile(f, "rw");
         int fileId = 0;
-        FileInfo fi = new FileInfo(fileId, raf);
+        FileHandle fi = new FileHandle(fileId, raf);
         fileManager.registerFile(fi);
         
         // declare fields
@@ -154,7 +154,7 @@
         Random rnd = new Random();
         rnd.setSeed(50);
         
-        ICachedPage page = bufferCache.pin(FileInfo.getDiskPageId(fileId, 0), false);
+        ICachedPage page = bufferCache.pin(FileHandle.getDiskPageId(fileId, 0), false);
         try {
         	        	        	        	
             IPrefixSlotManager slotManager = new FieldPrefixSlotManager();
diff --git a/hyracks-storage-am-btree/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeTest.java b/hyracks-storage-am-btree/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeTest.java
index 78b6d4d78..c448502 100644
--- a/hyracks-storage-am-btree/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeTest.java
+++ b/hyracks-storage-am-btree/src/test/java/edu/uci/ics/hyracks/storage/am/btree/BTreeTest.java
@@ -65,7 +65,7 @@
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICacheMemoryAllocator;
 import edu.uci.ics.hyracks.storage.common.buffercache.IPageReplacementStrategy;
-import edu.uci.ics.hyracks.storage.common.file.FileInfo;
+import edu.uci.ics.hyracks.storage.common.file.FileHandle;
 import edu.uci.ics.hyracks.storage.common.file.FileManager;
 
 @SuppressWarnings("unchecked")
@@ -117,7 +117,7 @@
         File f = new File(tmpDir + "/" + "btreetest.bin");
         RandomAccessFile raf = new RandomAccessFile(f, "rw");
         int fileId = 0;
-        FileInfo fi = new FileInfo(fileId, raf);
+        FileHandle fi = new FileHandle(fileId, raf);
         fileManager.registerFile(fi);
         
         // declare fields
@@ -335,7 +335,7 @@
         File f = new File(tmpDir + "/" + "btreetest.bin");
         RandomAccessFile raf = new RandomAccessFile(f, "rw");
         int fileId = 0;
-        FileInfo fi = new FileInfo(fileId, raf);
+        FileHandle fi = new FileHandle(fileId, raf);
         fileManager.registerFile(fi);
                 
         // declare fields
@@ -523,7 +523,7 @@
     	File f = new File(tmpDir + "/" + "btreetest.bin");
     	RandomAccessFile raf = new RandomAccessFile(f, "rw");
     	int fileId = 0;
-    	FileInfo fi = new FileInfo(fileId, raf);
+    	FileHandle fi = new FileHandle(fileId, raf);
     	fileManager.registerFile(fi);
     	
     	// declare fields
@@ -703,7 +703,7 @@
         File f = new File(tmpDir + "/" + "btreetest.bin");
         RandomAccessFile raf = new RandomAccessFile(f, "rw");
         int fileId = 0;
-        FileInfo fi = new FileInfo(fileId, raf);
+        FileHandle fi = new FileHandle(fileId, raf);
         fileManager.registerFile(fi);
                 
         // declare fields
@@ -869,7 +869,7 @@
         File f = new File(tmpDir + "/" + "btreetest.bin");
         RandomAccessFile raf = new RandomAccessFile(f, "rw");
         int fileId = 0;
-        FileInfo fi = new FileInfo(fileId, raf);
+        FileHandle fi = new FileHandle(fileId, raf);
         fileManager.registerFile(fi);
         
         // declare fields
@@ -1028,7 +1028,7 @@
         File f = new File(tmpDir + "/" + "btreetest.bin");
         RandomAccessFile raf = new RandomAccessFile(f, "rw");
         int fileId = 0;
-        FileInfo fi = new FileInfo(fileId, raf);
+        FileHandle fi = new FileHandle(fileId, raf);
         fileManager.registerFile(fi);       
         
         // declare fields
diff --git a/hyracks-storage-am-invertedindex/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchers/SimpleConjunctiveSearcherTest.java b/hyracks-storage-am-invertedindex/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchers/SimpleConjunctiveSearcherTest.java
index 788e01b..34c3714 100644
--- a/hyracks-storage-am-invertedindex/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchers/SimpleConjunctiveSearcherTest.java
+++ b/hyracks-storage-am-invertedindex/src/test/java/edu/uci/ics/hyracks/storage/am/invertedindex/searchers/SimpleConjunctiveSearcherTest.java
@@ -52,7 +52,7 @@
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
 import edu.uci.ics.hyracks.storage.common.buffercache.ICacheMemoryAllocator;
 import edu.uci.ics.hyracks.storage.common.buffercache.IPageReplacementStrategy;
-import edu.uci.ics.hyracks.storage.common.file.FileInfo;
+import edu.uci.ics.hyracks.storage.common.file.FileHandle;
 import edu.uci.ics.hyracks.storage.common.file.FileManager;
 
 public class SimpleConjunctiveSearcherTest {
@@ -91,7 +91,7 @@
     	File f = new File(tmpDir + "/" + "btreetest.bin");
     	RandomAccessFile raf = new RandomAccessFile(f, "rw");
     	int fileId = 0;
-    	FileInfo fi = new FileInfo(fileId, raf);
+    	FileHandle fi = new FileHandle(fileId, raf);
     	fileManager.registerFile(fi);
     	
     	// declare fields
diff --git a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/IBufferCacheProvider.java b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/IStorageManagerInterface.java
similarity index 72%
rename from hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/IBufferCacheProvider.java
rename to hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/IStorageManagerInterface.java
index c1a0eb4..ad6f743 100644
--- a/hyracks-storage-am-btree/src/main/java/edu/uci/ics/hyracks/storage/am/btree/dataflow/IBufferCacheProvider.java
+++ b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/IStorageManagerInterface.java
@@ -12,15 +12,15 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
-package edu.uci.ics.hyracks.storage.am.btree.dataflow;
+package edu.uci.ics.hyracks.storage.common;
 
 import java.io.Serializable;
 
 import edu.uci.ics.hyracks.storage.common.buffercache.IBufferCache;
-import edu.uci.ics.hyracks.storage.common.file.FileManager;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapProvider;
 
-public interface IBufferCacheProvider extends Serializable {
-	public IBufferCache getBufferCache();
-	public FileManager getFileManager();
-}
+public interface IStorageManagerInterface extends Serializable {
+    public IBufferCache getBufferCache();
+
+    public IFileMapProvider getFileMapProvider();
+}
\ No newline at end of file
diff --git a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/BufferCache.java b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/BufferCache.java
index 3dcf8dc..331c48c 100644
--- a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/BufferCache.java
+++ b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/BufferCache.java
@@ -15,19 +15,24 @@
 package edu.uci.ics.hyracks.storage.common.buffercache;
 
 import java.io.IOException;
+import java.io.RandomAccessFile;
 import java.nio.ByteBuffer;
+import java.util.HashMap;
+import java.util.Map;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.concurrent.locks.ReentrantReadWriteLock;
+import java.util.logging.Logger;
 
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-import edu.uci.ics.hyracks.storage.common.file.FileInfo;
-import edu.uci.ics.hyracks.storage.common.file.FileManager;
+import edu.uci.ics.hyracks.storage.common.file.FileHandle;
+import edu.uci.ics.hyracks.storage.common.file.IFileMapManager;
 
 public class BufferCache implements IBufferCacheInternal {
+    private static final Logger LOGGER = Logger.getLogger(BufferCache.class.getName());
     private static final int MAP_FACTOR = 2;
 
     private static final int MAX_VICTIMIZATION_TRY_COUNT = 3;
@@ -37,13 +42,14 @@
     private final CachedPage[] cachedPages;
     private final CacheBucket[] pageMap;
     private final IPageReplacementStrategy pageReplacementStrategy;
-    private final FileManager fileManager;
+    private final IFileMapManager fileMapManager;
     private final CleanerThread cleanerThread;
+    private final Map<Integer, FileHandle> fileInfoMap;
 
     private boolean closed;
 
     public BufferCache(ICacheMemoryAllocator allocator, IPageReplacementStrategy pageReplacementStrategy,
-            FileManager fileManager, int pageSize, int numPages) {
+            IFileMapManager fileMapManager, int pageSize, int numPages) {
         this.pageSize = pageSize;
         this.numPages = numPages;
         pageReplacementStrategy.setBufferCache(this);
@@ -57,7 +63,8 @@
             pageMap[i] = new CacheBucket();
         }
         this.pageReplacementStrategy = pageReplacementStrategy;
-        this.fileManager = fileManager;
+        this.fileMapManager = fileMapManager;
+        fileInfoMap = new HashMap<Integer, FileHandle>();
         cleanerThread = new CleanerThread();
         cleanerThread.start();
         closed = false;
@@ -269,21 +276,31 @@
     }
 
     private void read(CachedPage cPage) throws HyracksDataException {
-        FileInfo fInfo = fileManager.getFileInfo(FileInfo.getFileId(cPage.dpid));
+        FileHandle fInfo = getFileInfo(cPage);
         try {
             cPage.buffer.clear();
-            fInfo.getFileChannel().read(cPage.buffer, (long) FileInfo.getPageId(cPage.dpid) * pageSize);
+            fInfo.getFileChannel().read(cPage.buffer, (long) FileHandle.getPageId(cPage.dpid) * pageSize);
         } catch (IOException e) {
             throw new HyracksDataException(e);
         }
     }
 
+    private FileHandle getFileInfo(CachedPage cPage) throws HyracksDataException {
+        synchronized (fileInfoMap) {
+            FileHandle fInfo = fileInfoMap.get(FileHandle.getFileId(cPage.dpid));
+            if (fInfo == null) {
+                throw new HyracksDataException("No such file mapped");
+            }
+            return fInfo;
+        }
+    }
+
     private void write(CachedPage cPage) throws HyracksDataException {
-        FileInfo fInfo = fileManager.getFileInfo(FileInfo.getFileId(cPage.dpid));
+        FileHandle fInfo = getFileInfo(cPage);
         try {
             cPage.buffer.position(0);
             cPage.buffer.limit(pageSize);
-            fInfo.getFileChannel().write(cPage.buffer, (long) FileInfo.getPageId(cPage.dpid) * pageSize);
+            fInfo.getFileChannel().write(cPage.buffer, (long) FileHandle.getPageId(cPage.dpid) * pageSize);
         } catch (IOException e) {
             throw new HyracksDataException(e);
         }
@@ -467,4 +484,108 @@
             }
         }
     }
+
+    @Override
+    public void createFile(String fileName) throws HyracksDataException {
+        LOGGER.info("Deleting file: " + fileName + " in cache: " + this);
+        synchronized (fileInfoMap) {
+            fileMapManager.registerFile(fileName);
+        }
+    }
+
+    @Override
+    public void openFile(int fileId) throws HyracksDataException {
+        LOGGER.info("Opening file: " + fileId + " in cache: " + this);
+        synchronized (fileInfoMap) {
+            FileHandle fInfo;
+            fInfo = fileInfoMap.get(fileId);
+            if (fInfo == null) {
+                String fileName = fileMapManager.lookupFileName(fileId);
+                try {
+                    fInfo = new FileHandle(fileId, new RandomAccessFile(fileName, "rw"));
+                } catch (IOException e) {
+                    throw new HyracksDataException(e);
+                }
+                fileInfoMap.put(fileId, fInfo);
+            }
+            fInfo.incReferenceCount();
+        }
+    }
+
+    private void sweepAndFlush(int fileId) throws HyracksDataException {
+        for (int i = 0; i < pageMap.length; ++i) {
+            CacheBucket bucket = pageMap[i];
+            bucket.bucketLock.lock();
+            try {
+                CachedPage prev = bucket.cachedPage;
+                while (prev != null) {
+                    CachedPage cPage = prev.next;
+                    if (cPage == null) {
+                        break;
+                    }
+                    if (invalidateIfFileIdMatch(fileId, cPage)) {
+                        prev.next = cPage.next;
+                        cPage.next = null;
+                    } else {
+                        prev = cPage;
+                    }
+                }
+                // Take care of the head of the chain.
+                if (bucket.cachedPage != null) {
+                    if (invalidateIfFileIdMatch(fileId, bucket.cachedPage)) {
+                        CachedPage cPage = bucket.cachedPage;
+                        bucket.cachedPage = bucket.cachedPage.next;
+                        cPage.next = null;
+                    }
+                }
+            } finally {
+                bucket.bucketLock.unlock();
+            }
+        }
+    }
+
+    private boolean invalidateIfFileIdMatch(int fileId, CachedPage cPage) throws HyracksDataException {
+        if (FileHandle.getFileId(cPage.dpid) == fileId) {
+            if (cPage.dirty.get()) {
+                write(cPage);
+                cPage.dirty.set(false);
+                cPage.pinCount.decrementAndGet();
+            }
+            System.err.println("PinCount: " + cPage.pinCount.get());
+            if (cPage.pinCount.get() != 0) {
+                throw new IllegalStateException("Page is pinned and file is being closed");
+            }
+            cPage.valid = false;
+            return true;
+        }
+        return false;
+    }
+
+    @Override
+    public void closeFile(int fileId) throws HyracksDataException {
+        LOGGER.info("Closing file: " + fileId + " in cache: " + this);
+        synchronized (fileInfoMap) {
+            FileHandle fInfo = fileInfoMap.get(fileId);
+            if (fInfo == null) {
+                throw new HyracksDataException("Closing unopened file");
+            }
+            if (fInfo.decReferenceCount() <= 0) {
+                sweepAndFlush(fileId);
+                fileInfoMap.remove(fileId);
+                fInfo.close();
+            }
+        }
+    }
+
+    @Override
+    public synchronized void deleteFile(int fileId) throws HyracksDataException {
+        LOGGER.info("Deleting file: " + fileId + " in cache: " + this);
+        synchronized (fileInfoMap) {
+            FileHandle fInfo = fileInfoMap.get(fileId);
+            if (fInfo != null) {
+                throw new HyracksDataException("Deleting open file");
+            }
+            fileMapManager.unregisterFile(fileId);
+        }
+    }
 }
\ No newline at end of file
diff --git a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/IBufferCache.java b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/IBufferCache.java
index 34bfc2f..2e7181e 100644
--- a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/IBufferCache.java
+++ b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/buffercache/IBufferCache.java
@@ -17,6 +17,14 @@
 import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
 
 public interface IBufferCache {
+    public void createFile(String fileName) throws HyracksDataException;
+
+    public void openFile(int fileId) throws HyracksDataException;
+
+    public void closeFile(int fileId) throws HyracksDataException;
+
+    public void deleteFile(int fileId) throws HyracksDataException;
+
     public ICachedPage pin(long dpid, boolean newPage) throws HyracksDataException;
 
     public void unpin(ICachedPage page) throws HyracksDataException;
diff --git a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/FileInfo.java b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/FileHandle.java
similarity index 69%
rename from hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/FileInfo.java
rename to hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/FileHandle.java
index 9b9270d..ddbedb4 100644
--- a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/FileInfo.java
+++ b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/FileHandle.java
@@ -14,17 +14,23 @@
  */
 package edu.uci.ics.hyracks.storage.common.file;
 
+import java.io.IOException;
 import java.io.RandomAccessFile;
 import java.nio.channels.FileChannel;
+import java.util.concurrent.atomic.AtomicInteger;
 
-public class FileInfo {
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public class FileHandle {
     private final int fileId;
     private final RandomAccessFile file;
+    private final AtomicInteger refCount;
     private FileChannel channel;
 
-    public FileInfo(int fileId, RandomAccessFile file) {
+    public FileHandle(int fileId, RandomAccessFile file) {
         this.fileId = fileId;
         this.file = file;
+        refCount = new AtomicInteger();
         channel = file.getChannel();
     }
 
@@ -40,6 +46,23 @@
         return channel;
     }
 
+    public void close() throws HyracksDataException {
+        try {
+            channel.close();
+            file.close();
+        } catch (IOException e) {
+            throw new HyracksDataException(e);
+        }
+    }
+
+    public int incReferenceCount() {
+        return refCount.incrementAndGet();
+    }
+
+    public int decReferenceCount() {
+        return refCount.decrementAndGet();
+    }
+
     public long getDiskPageId(int pageId) {
         return getDiskPageId(fileId, pageId);
     }
diff --git a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/FileManager.java b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/FileManager.java
deleted file mode 100644
index 86e236d..0000000
--- a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/FileManager.java
+++ /dev/null
@@ -1,61 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.storage.common.file;
-
-import java.io.IOException;
-import java.util.HashMap;
-import java.util.Map;
-
-import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
-
-public class FileManager {
-    private final Map<Integer, FileInfo> fileRegistry;
-
-    public FileManager() {
-        fileRegistry = new HashMap<Integer, FileInfo>();
-    }
-
-    public void registerFile(FileInfo fInfo) throws HyracksDataException {
-        if (fileRegistry.containsKey(fInfo.getFileId())) {
-            throw new HyracksDataException("File " + fInfo.getFile().toString() + " with id " + fInfo.getFileId() + " is already registered");
-        }
-        fileRegistry.put(fInfo.getFileId(), fInfo);
-    }
-
-    public FileInfo unregisterFile(int fileId) throws HyracksDataException {
-        if (!fileRegistry.containsKey(fileId)) {
-            throw new HyracksDataException("File with id " + fileId + " not in registry");
-        }
-        return fileRegistry.remove(fileId);
-    }
-
-    public FileInfo getFileInfo(int fileId) throws HyracksDataException {
-        FileInfo fInfo = fileRegistry.get(fileId);
-        if (fInfo == null) {
-            throw new HyracksDataException("File with id " + fileId + " not in registry");
-        }
-        return fInfo;
-    }
-
-    public void close() {
-        for (FileInfo fInfo : fileRegistry.values()) {
-            try {
-                fInfo.getFileChannel().close();
-            } catch (IOException e) {
-                e.printStackTrace();
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/IFileMapManager.java b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/IFileMapManager.java
new file mode 100644
index 0000000..d37e576
--- /dev/null
+++ b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/IFileMapManager.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+/**
+ * Maintains the mapping between file names and file ids.
+ * 
+ * @author vinayakb
+ */
+public interface IFileMapManager extends IFileMapProvider {
+    /**
+     * Register a new file name.
+     * 
+     * @param fileName
+     *            - the name of the file to register
+     * @throws HyracksDataException
+     *             - if a mapping for the file already exists.
+     */
+    public void registerFile(String fileName) throws HyracksDataException;
+
+    /**
+     * Unregister a file mapping
+     * 
+     * @param fileId
+     *            - The file id whose mapping is to be unregistered.
+     * @throws HyracksDataException
+     *             - If the fileid is not mapped currently in this manager.
+     */
+    public void unregisterFile(int fileId) throws HyracksDataException;
+}
\ No newline at end of file
diff --git a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/IFileMapProvider.java b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/IFileMapProvider.java
new file mode 100644
index 0000000..38d9f8c
--- /dev/null
+++ b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/IFileMapProvider.java
@@ -0,0 +1,59 @@
+/*
+ * Copyright 2009-2010 by The Regents of the University of California
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * you may obtain a copy of the License from
+ * 
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package edu.uci.ics.hyracks.storage.common.file;
+
+import java.io.Serializable;
+
+import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
+
+public interface IFileMapProvider extends Serializable {
+    /**
+     * Indicates if a given fileId is mapped
+     * 
+     * @param fileId
+     * @return <code>true</code> if the given fileId is mapped, <code>false</code> otherwise.
+     */
+    public boolean isMapped(int fileId);
+
+    /**
+     * Indicates if a given file name is mapped.
+     * 
+     * @param fileName
+     * @return <code>true</code> if the given file name is mapped, <code>false</code> otherwise.
+     */
+    public boolean isMapped(String fileName);
+
+    /**
+     * Lookup the file id for a file name
+     * 
+     * @param fileName
+     *            - The file name whose id should be looked up.
+     * @return The file id
+     * @throws HyracksDataException
+     *             - If the file name is not currently mapped in this manager.
+     */
+    public int lookupFileId(String fileName) throws HyracksDataException;
+
+    /**
+     * Lookup the file name for a file id
+     * 
+     * @param fileId
+     *            - The file id whose name should be looked up.
+     * @return The file name
+     * @throws HyracksDataException
+     *             - If the file id is not mapped currently in this manager.
+     */
+    public String lookupFileName(int fileId) throws HyracksDataException;
+}
\ No newline at end of file
diff --git a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/IFileMappingProvider.java b/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/IFileMappingProvider.java
deleted file mode 100644
index 6fb44a1..0000000
--- a/hyracks-storage-common/src/main/java/edu/uci/ics/hyracks/storage/common/file/IFileMappingProvider.java
+++ /dev/null
@@ -1,50 +0,0 @@
-/*
- * Copyright 2009-2010 by The Regents of the University of California
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * you may obtain a copy of the License from
- * 
- *     http://www.apache.org/licenses/LICENSE-2.0
- * 
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package edu.uci.ics.hyracks.storage.common.file;
-
-import java.io.Serializable;
-
-public interface IFileMappingProvider extends Serializable {
-    /**
-     * Provide the mapping from a file name to an integer id.
-     * 
-     * @param name
-     *            - Name of the file
-     * @param create
-     *            - Indicate if a new mapping should be created if one does not exist
-     * @return The file id on a successful lookup, null if unsuccessful.
-     */
-    public Integer mapNameToFileId(String name, boolean create);
-           
-    /**
-     * Remove the mapping from a file name to an integer id.
-     * 
-     * @param name
-     *            - Name of the file
-     * 
-     * @return void
-     */
-    public void unmapName(String name);
-    
-    /**
-     * Get file id of an already mapped file
-     * 
-     * @param name
-     *            - Name of the file
-     * 
-     * @return The file id on a successful lookup, null if unsuccessful.
-     */
-    public Integer getFileId(String name);
-}
\ No newline at end of file