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diff --git a/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/store/SimpleFSDirectory.java b/lucene-java-3.5.0/lucene/src/java/org/apache/lucene/store/SimpleFSDirectory.java
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+package org.apache.lucene.store;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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 at
+ *
+ *     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.
+ */
+
+import java.io.File;
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+/** A straightforward implementation of {@link FSDirectory}
+ *  using java.io.RandomAccessFile.  However, this class has
+ *  poor concurrent performance (multiple threads will
+ *  bottleneck) as it synchronizes when multiple threads
+ *  read from the same file.  It's usually better to use
+ *  {@link NIOFSDirectory} or {@link MMapDirectory} instead. */
+public class SimpleFSDirectory extends FSDirectory {
+    
+  /** Create a new SimpleFSDirectory for the named location.
+   *
+   * @param path the path of the directory
+   * @param lockFactory the lock factory to use, or null for the default
+   * ({@link NativeFSLockFactory});
+   * @throws IOException
+   */
+  public SimpleFSDirectory(File path, LockFactory lockFactory) throws IOException {
+    super(path, lockFactory);
+  }
+  
+  /** Create a new SimpleFSDirectory for the named location and {@link NativeFSLockFactory}.
+   *
+   * @param path the path of the directory
+   * @throws IOException
+   */
+  public SimpleFSDirectory(File path) throws IOException {
+    super(path, null);
+  }
+
+  /** Creates an IndexInput for the file with the given name. */
+  @Override
+  public IndexInput openInput(String name, int bufferSize) throws IOException {
+    ensureOpen();
+    final File path = new File(directory, name);
+    return new SimpleFSIndexInput("SimpleFSIndexInput(path=\"" + path.getPath() + "\")", path, bufferSize, getReadChunkSize());
+  }
+
+  protected static class SimpleFSIndexInput extends BufferedIndexInput {
+  
+    protected static class Descriptor extends RandomAccessFile {
+      // remember if the file is open, so that we don't try to close it
+      // more than once
+      protected volatile boolean isOpen;
+      long position;
+      final long length;
+      
+      public Descriptor(File file, String mode) throws IOException {
+        super(file, mode);
+        isOpen=true;
+        length=length();
+      }
+  
+      @Override
+      public void close() throws IOException {
+        if (isOpen) {
+          isOpen=false;
+          super.close();
+        }
+      }
+    }
+  
+    protected final Descriptor file;
+    boolean isClone;
+    //  LUCENE-1566 - maximum read length on a 32bit JVM to prevent incorrect OOM 
+    protected final int chunkSize;
+
+    /** @deprecated please pass resourceDesc */
+    @Deprecated
+    public SimpleFSIndexInput(File path, int bufferSize, int chunkSize) throws IOException {
+      this("anonymous SimpleFSIndexInput", path, bufferSize, chunkSize);
+    }
+
+    public SimpleFSIndexInput(String resourceDesc, File path, int bufferSize, int chunkSize) throws IOException {
+      super(resourceDesc, bufferSize);
+      file = new Descriptor(path, "r");
+      this.chunkSize = chunkSize;
+    }
+  
+    /** IndexInput methods */
+    @Override
+    protected void readInternal(byte[] b, int offset, int len)
+         throws IOException {
+      synchronized (file) {
+        long position = getFilePointer();
+        if (position != file.position) {
+          file.seek(position);
+          file.position = position;
+        }
+        int total = 0;
+
+        try {
+          do {
+            final int readLength;
+            if (total + chunkSize > len) {
+              readLength = len - total;
+            } else {
+              // LUCENE-1566 - work around JVM Bug by breaking very large reads into chunks
+              readLength = chunkSize;
+            }
+            final int i = file.read(b, offset + total, readLength);
+            if (i == -1) {
+              throw new IOException("read past EOF");
+            }
+            file.position += i;
+            total += i;
+          } while (total < len);
+        } catch (OutOfMemoryError e) {
+          // propagate OOM up and add a hint for 32bit VM Users hitting the bug
+          // with a large chunk size in the fast path.
+          final OutOfMemoryError outOfMemoryError = new OutOfMemoryError(
+              "OutOfMemoryError likely caused by the Sun VM Bug described in "
+              + "https://issues.apache.org/jira/browse/LUCENE-1566; try calling FSDirectory.setReadChunkSize "
+              + "with a value smaller than the current chunk size (" + chunkSize + ")");
+          outOfMemoryError.initCause(e);
+          throw outOfMemoryError;
+        } catch (IOException ioe) {
+          IOException newIOE = new IOException(ioe.getMessage() + ": " + this);
+          newIOE.initCause(ioe);
+          throw newIOE;
+        }
+      }
+    }
+  
+    @Override
+    public void close() throws IOException {
+      // only close the file if this is not a clone
+      if (!isClone) file.close();
+    }
+  
+    @Override
+    protected void seekInternal(long position) {
+    }
+  
+    @Override
+    public long length() {
+      return file.length;
+    }
+  
+    @Override
+    public Object clone() {
+      SimpleFSIndexInput clone = (SimpleFSIndexInput)super.clone();
+      clone.isClone = true;
+      return clone;
+    }
+  
+    /** Method used for testing. Returns true if the underlying
+     *  file descriptor is valid.
+     */
+    boolean isFDValid() throws IOException {
+      return file.getFD().valid();
+    }
+    
+    @Override
+    public void copyBytes(IndexOutput out, long numBytes) throws IOException {
+      numBytes -= flushBuffer(out, numBytes);
+      // If out is FSIndexOutput, the copy will be optimized
+      out.copyBytes(this, numBytes);
+    }
+  }
+}