RandomAccessInputStream.java

package org.apache.lucene.util;

/*
 * Copyright 2006-2007 The Apache Software Foundation.
 *
 * 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 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;
import java.io.InputStream;
import java.io.RandomAccessFile;

/**
 * Provides a handy InputStream wrapper around a RandomAccessFile.
 *
 * @author Martin Haye
 */
public class RandomAccessInputStream extends InputStream 
{
  /** The file that will be read from */
  private RandomAccessFile in;

  /** Wrap a RandomAccessFile */
  public RandomAccessInputStream(RandomAccessFile in) {
    this.in = in;
  }

  // The remaining methods are all simple wrappers
  public int read()
    throws IOException 
  {
    return in.read();
  }

  public int read(byte[] b)
    throws IOException 
  {
    return read(b, 0, b.length);
  }

  public int read(byte[] b, int off, int len)
    throws IOException 
  {
    return in.read(b, off, len);
  }

  public long skip(long n)
    throws IOException 
  {
    return in.skipBytes((int)n);
  }

  public void seek(long n)
    throws IOException 
  {
    in.seek(n);
  }

  public long getFilePointer()
    throws IOException 
  {
    return in.getFilePointer();
  }

  public void close()
    throws IOException 
  {
    in.close();
  }
}