pylucene 3.5.0-3

[pylucene.git] / lucene-java-3.4.0 / lucene / src / java / org / apache / lucene / store / RAMInputStream.java

diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/store/RAMInputStream.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/store/RAMInputStream.java
deleted file mode 100644 (file)
index 2edde9a..0000000
--- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/store/RAMInputStream.java
+++ /dev/null
@@ -1,140 +0,0 @@
-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.IOException;
-
-/** A memory-resident {@link IndexInput} implementation. 
- *  
- *  @lucene.internal */
-public class RAMInputStream extends IndexInput implements Cloneable {
-  static final int BUFFER_SIZE = RAMOutputStream.BUFFER_SIZE;
-
-  private RAMFile file;
-  private long length;
-
-  private byte[] currentBuffer;
-  private int currentBufferIndex;
-  
-  private int bufferPosition;
-  private long bufferStart;
-  private int bufferLength;
-
-  public RAMInputStream(RAMFile f) throws IOException {
-    file = f;
-    length = file.length;
-    if (length/BUFFER_SIZE >= Integer.MAX_VALUE) {
-      throw new IOException("Too large RAMFile! "+length); 
-    }
-
-    // make sure that we switch to the
-    // first needed buffer lazily
-    currentBufferIndex = -1;
-    currentBuffer = null;
-  }
-
-  @Override
-  public void close() {
-    // nothing to do here
-  }
-
-  @Override
-  public long length() {
-    return length;
-  }
-
-  @Override
-  public byte readByte() throws IOException {
-    if (bufferPosition >= bufferLength) {
-      currentBufferIndex++;
-      switchCurrentBuffer(true);
-    }
-    return currentBuffer[bufferPosition++];
-  }
-
-  @Override
-  public void readBytes(byte[] b, int offset, int len) throws IOException {
-    while (len > 0) {
-      if (bufferPosition >= bufferLength) {
-        currentBufferIndex++;
-        switchCurrentBuffer(true);
-      }
-
-      int remainInBuffer = bufferLength - bufferPosition;
-      int bytesToCopy = len < remainInBuffer ? len : remainInBuffer;
-      System.arraycopy(currentBuffer, bufferPosition, b, offset, bytesToCopy);
-      offset += bytesToCopy;
-      len -= bytesToCopy;
-      bufferPosition += bytesToCopy;
-    }
-  }
-
-  private final void switchCurrentBuffer(boolean enforceEOF) throws IOException {
-    bufferStart = (long) BUFFER_SIZE * (long) currentBufferIndex;
-    if (currentBufferIndex >= file.numBuffers()) {
-      // end of file reached, no more buffers left
-      if (enforceEOF)
-        throw new IOException("Read past EOF");
-      else {
-        // Force EOF if a read takes place at this position
-        currentBufferIndex--;
-        bufferPosition = BUFFER_SIZE;
-      }
-    } else {
-      currentBuffer = file.getBuffer(currentBufferIndex);
-      bufferPosition = 0;
-      long buflen = length - bufferStart;
-      bufferLength = buflen > BUFFER_SIZE ? BUFFER_SIZE : (int) buflen;
-    }
-  }
-
-  @Override
-  public void copyBytes(IndexOutput out, long numBytes) throws IOException {
-    assert numBytes >= 0: "numBytes=" + numBytes;
-    
-    long left = numBytes;
-    while (left > 0) {
-      if (bufferPosition == bufferLength) {
-        ++currentBufferIndex;
-        switchCurrentBuffer(true);
-      }
-      
-      final int bytesInBuffer = bufferLength - bufferPosition;
-      final int toCopy = (int) (bytesInBuffer < left ? bytesInBuffer : left);
-      out.writeBytes(currentBuffer, bufferPosition, toCopy);
-      bufferPosition += toCopy;
-      left -= toCopy;
-    }
-    
-    assert left == 0: "Insufficient bytes to copy: numBytes=" + numBytes + " copied=" + (numBytes - left);
-  }
-  
-  @Override
-  public long getFilePointer() {
-    return currentBufferIndex < 0 ? 0 : bufferStart + bufferPosition;
-  }
-
-  @Override
-  public void seek(long pos) throws IOException {
-    if (currentBuffer==null || pos < bufferStart || pos >= bufferStart + BUFFER_SIZE) {
-      currentBufferIndex = (int) (pos / BUFFER_SIZE);
-      switchCurrentBuffer(false);
-    }
-    bufferPosition = (int) (pos % BUFFER_SIZE);
-  }
-}