X-Git-Url: https://git.mdrn.pl/pylucene.git/blobdiff_plain/a2e61f0c04805cfcb8706176758d1283c7e3a55c..aaeed5504b982cf3545252ab528713250aa33eed:/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/index/CompoundFileReader.java

diff --git a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/index/CompoundFileReader.java b/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/index/CompoundFileReader.java
deleted file mode 100644
index 21eb006..0000000
--- a/lucene-java-3.4.0/lucene/src/java/org/apache/lucene/index/CompoundFileReader.java
+++ /dev/null
@@ -1,311 +0,0 @@
-package org.apache.lucene.index;
-
-/**
- * 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 org.apache.lucene.store.Directory;
-import org.apache.lucene.store.IndexInput;
-import org.apache.lucene.store.BufferedIndexInput;
-import org.apache.lucene.store.IndexOutput;
-import org.apache.lucene.store.Lock;
-
-import java.util.HashMap;
-import java.io.FileNotFoundException;
-import java.io.IOException;
-
-/**
- * Class for accessing a compound stream.
- * This class implements a directory, but is limited to only read operations.
- * Directory methods that would normally modify data throw an exception.
- */
-class CompoundFileReader extends Directory {
-  
-  private int readBufferSize;
-  
-  private static final class FileEntry {
-    long offset;
-    long length;
-  }
-    
-  // Base info
-  private Directory directory;
-  private String fileName;
-  
-  private IndexInput stream;
-  private HashMap<String,FileEntry> entries = new HashMap<String,FileEntry>();
-  
-  public CompoundFileReader(Directory dir, String name) throws IOException {
-    this(dir, name, BufferedIndexInput.BUFFER_SIZE);
-  }
-  
-  public CompoundFileReader(Directory dir, String name, int readBufferSize) throws IOException {
-    assert !(dir instanceof CompoundFileReader) : "compound file inside of compound file: " + name;
-    directory = dir;
-    fileName = name;
-    this.readBufferSize = readBufferSize;
-    
-    boolean success = false;
-    
-    try {
-      stream = dir.openInput(name, readBufferSize);
-      
-      // read the first VInt. If it is negative, it's the version number
-      // otherwise it's the count (pre-3.1 indexes)
-      int firstInt = stream.readVInt();
-      
-      final int count;
-      final boolean stripSegmentName;
-      if (firstInt < CompoundFileWriter.FORMAT_PRE_VERSION) {
-        if (firstInt < CompoundFileWriter.FORMAT_CURRENT) {
-          throw new CorruptIndexException("Incompatible format version: "
-              + firstInt + " expected " + CompoundFileWriter.FORMAT_CURRENT);
-        }
-        // It's a post-3.1 index, read the count.
-        count = stream.readVInt();
-        stripSegmentName = false;
-      } else {
-        count = firstInt;
-        stripSegmentName = true;
-      }
-      
-      // read the directory and init files
-      FileEntry entry = null;
-      for (int i=0; i<count; i++) {
-        long offset = stream.readLong();
-        String id = stream.readString();
-        
-        if (stripSegmentName) {
-          // Fix the id to not include the segment names. This is relevant for
-          // pre-3.1 indexes.
-          id = IndexFileNames.stripSegmentName(id);
-        }
-        
-        if (entry != null) {
-          // set length of the previous entry
-          entry.length = offset - entry.offset;
-        }
-        
-        entry = new FileEntry();
-        entry.offset = offset;
-        entries.put(id, entry);
-      }
-      
-      // set the length of the final entry
-      if (entry != null) {
-        entry.length = stream.length() - entry.offset;
-      }
-      
-      success = true;
-      
-    } finally {
-      if (!success && (stream != null)) {
-        try {
-          stream.close();
-        } catch (IOException e) { }
-      }
-    }
-  }
-  
-  public Directory getDirectory() {
-    return directory;
-  }
-  
-  public String getName() {
-    return fileName;
-  }
-  
-  @Override
-  public synchronized void close() throws IOException {
-    if (stream == null)
-      throw new IOException("Already closed");
-    
-    entries.clear();
-    stream.close();
-    stream = null;
-  }
-  
-  @Override
-  public synchronized IndexInput openInput(String id) throws IOException {
-    // Default to readBufferSize passed in when we were opened
-    return openInput(id, readBufferSize);
-  }
-  
-  @Override
-  public synchronized IndexInput openInput(String id, int readBufferSize) throws IOException {
-    if (stream == null)
-      throw new IOException("Stream closed");
-    
-    id = IndexFileNames.stripSegmentName(id);
-    FileEntry entry = entries.get(id);
-    if (entry == null) {
-      throw new IOException("No sub-file with id " + id + " found (fileName=" + fileName + " files: " + entries.keySet() + ")");
-    }
-    
-    return new CSIndexInput(stream, entry.offset, entry.length, readBufferSize);
-  }
-  
-  /** Returns an array of strings, one for each file in the directory. */
-  @Override
-  public String[] listAll() {
-    String[] res = entries.keySet().toArray(new String[entries.size()]);
-    // Add the segment name
-    String seg = fileName.substring(0, fileName.indexOf('.'));
-    for (int i = 0; i < res.length; i++) {
-      res[i] = seg + res[i];
-    }
-    return res;
-  }
-  
-  /** Returns true iff a file with the given name exists. */
-  @Override
-  public boolean fileExists(String name) {
-    return entries.containsKey(IndexFileNames.stripSegmentName(name));
-  }
-  
-  /** Returns the time the compound file was last modified. */
-  @Override
-  public long fileModified(String name) throws IOException {
-    return directory.fileModified(fileName);
-  }
-  
-  /** Set the modified time of the compound file to now.
-   *  @deprecated Lucene never uses this API; it will be
-   *  removed in 4.0. */
-  @Override
-  @Deprecated
-  public void touchFile(String name) throws IOException {
-    directory.touchFile(fileName);
-  }
-  
-  /** Not implemented
-   * @throws UnsupportedOperationException */
-  @Override
-  public void deleteFile(String name) {
-    throw new UnsupportedOperationException();
-  }
-  
-  /** Not implemented
-   * @throws UnsupportedOperationException */
-  public void renameFile(String from, String to) {
-    throw new UnsupportedOperationException();
-  }
-  
-  /** Returns the length of a file in the directory.
-   * @throws IOException if the file does not exist */
-  @Override
-  public long fileLength(String name) throws IOException {
-    FileEntry e = entries.get(IndexFileNames.stripSegmentName(name));
-    if (e == null)
-      throw new FileNotFoundException(name);
-    return e.length;
-  }
-  
-  /** Not implemented
-   * @throws UnsupportedOperationException */
-  @Override
-  public IndexOutput createOutput(String name) {
-    throw new UnsupportedOperationException();
-  }
-  
-  /** Not implemented
-   * @throws UnsupportedOperationException */
-  @Override
-  public Lock makeLock(String name) {
-    throw new UnsupportedOperationException();
-  }
-  
-  /** Implementation of an IndexInput that reads from a portion of the
-   *  compound file. The visibility is left as "package" *only* because
-   *  this helps with testing since JUnit test cases in a different class
-   *  can then access package fields of this class.
-   */
-  static final class CSIndexInput extends BufferedIndexInput {
-    IndexInput base;
-    long fileOffset;
-    long length;
-    
-    CSIndexInput(final IndexInput base, final long fileOffset, final long length) {
-      this(base, fileOffset, length, BufferedIndexInput.BUFFER_SIZE);
-    }
-    
-    CSIndexInput(final IndexInput base, final long fileOffset, final long length, int readBufferSize) {
-      super(readBufferSize);
-      this.base = (IndexInput)base.clone();
-      this.fileOffset = fileOffset;
-      this.length = length;
-    }
-    
-    @Override
-    public Object clone() {
-      CSIndexInput clone = (CSIndexInput)super.clone();
-      clone.base = (IndexInput)base.clone();
-      clone.fileOffset = fileOffset;
-      clone.length = length;
-      return clone;
-    }
-    
-    /** Expert: implements buffer refill.  Reads bytes from the current
-     *  position in the input.
-     * @param b the array to read bytes into
-     * @param offset the offset in the array to start storing bytes
-     * @param len the number of bytes to read
-     */
-    @Override
-    protected void readInternal(byte[] b, int offset, int len) throws IOException {
-      long start = getFilePointer();
-      if(start + len > length)
-        throw new IOException("read past EOF");
-      base.seek(fileOffset + start);
-      base.readBytes(b, offset, len, false);
-    }
-    
-    /** Expert: implements seek.  Sets current position in this file, where
-     *  the next {@link #readInternal(byte[],int,int)} will occur.
-     * @see #readInternal(byte[],int,int)
-     */
-    @Override
-    protected void seekInternal(long pos) {}
-    
-    /** Closes the stream to further operations. */
-    @Override
-    public void close() throws IOException {
-      base.close();
-    }
-    
-    @Override
-    public long length() {
-      return length;
-    }
-    
-    @Override
-    public void copyBytes(IndexOutput out, long numBytes) throws IOException {
-      // Copy first whatever is in the buffer
-      numBytes -= flushBuffer(out, numBytes);
-      
-      // If there are more bytes left to copy, delegate the copy task to the
-      // base IndexInput, in case it can do an optimized copy.
-      if (numBytes > 0) {
-        long start = getFilePointer();
-        if (start + numBytes > length) {
-          throw new IOException("read past EOF");
-        }
-        base.seek(fileOffset + start);
-        base.copyBytes(out, numBytes);
-      }
-    }
-  }
-}