/*
    * 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.
   */
  package org.apache.commons.vfs2.util;
  
  import java.io.IOException;
  import java.io.InputStream;
  
  import org.apache.commons.vfs2.RandomAccessContent;
  
  /**
   * A RandomAccessContent that provides end-of-stream monitoring.
   */
  public class MonitorRandomAccessContent implements RandomAccessContent {
  
      private final RandomAccessContent content;
      private boolean finished;
  
      /**
       * Constructs a new instance.
       *
       * @param content The contents.
       */
      public MonitorRandomAccessContent(final RandomAccessContent content) {
          this.content = content;
      }
  
      /**
       * Closes this content.
       *
       * @throws IOException if an error occurs.
       */
      @Override
      public void close() throws IOException {
          if (finished) {
              return;
          }
  
          // Close the output stream
          IOException exc;
          try {
              content.close();
          } catch (final IOException ioe) {
              exc = ioe;
          }
  
          // Notify of end of output
          exc = null;
          try {
              onClose();
          } catch (final IOException ioe) {
              exc = ioe;
          }
  
          finished = true;
  
          if (exc != null) {
              throw exc;
          }
      }
  
      @Override
      public long getFilePointer() throws IOException {
          return content.getFilePointer();
      }
  
      @Override
      public InputStream getInputStream() throws IOException {
          return content.getInputStream();
      }
  
      @Override
      public long length() throws IOException {
          return content.length();
      }
  
      /**
       * Called after this stream is closed.
       *
       * @throws IOException if subclass throws it.
       */
      @SuppressWarnings("unused") // IOException is needed because subclasses may need to throw it
      protected void onClose() throws IOException {
      }
  
      @Override
     public boolean readBoolean() throws IOException {
         return content.readBoolean();
     }
 
     @Override
     public byte readByte() throws IOException {
         return content.readByte();
     }
 
     @Override
     public char readChar() throws IOException {
         return content.readChar();
     }
 
     @Override
     public double readDouble() throws IOException {
         return content.readDouble();
     }
 
     @Override
     public float readFloat() throws IOException {
         return content.readFloat();
     }
 
     @Override
     public void readFully(final byte[] b) throws IOException {
         content.readFully(b);
     }
 
     @Override
     public void readFully(final byte[] b, final int off, final int len) throws IOException {
         content.readFully(b, off, len);
     }
 
     @Override
     public int readInt() throws IOException {
         return content.readInt();
     }
 
     @Override
     public String readLine() throws IOException {
         return content.readLine();
     }
 
     @Override
     public long readLong() throws IOException {
         return content.readLong();
     }
 
     @Override
     public short readShort() throws IOException {
         return content.readShort();
     }
 
     @Override
     public int readUnsignedByte() throws IOException {
         return content.readUnsignedByte();
     }
 
     @Override
     public int readUnsignedShort() throws IOException {
         return content.readUnsignedShort();
     }
 
     @Override
     public String readUTF() throws IOException {
         return content.readUTF();
     }
 
     @Override
     public void seek(final long pos) throws IOException {
         content.seek(pos);
     }
 
     @Override
     public void setLength(final long newLength) throws IOException {
         content.setLength(newLength);
     }
 
     @Override
     public int skipBytes(final int n) throws IOException {
         return content.skipBytes(n);
     }
 
     @Override
     public void write(final byte[] b) throws IOException {
         content.write(b);
     }
 
     @Override
     public void write(final byte[] b, final int off, final int len) throws IOException {
         content.write(b, off, len);
     }
 
     @Override
     public void write(final int b) throws IOException {
         content.write(b);
     }
 
     @Override
     public void writeBoolean(final boolean v) throws IOException {
         content.writeBoolean(v);
     }
 
     @Override
     public void writeByte(final int v) throws IOException {
         content.writeByte(v);
     }
 
     @Override
     public void writeBytes(final String s) throws IOException {
         content.writeBytes(s);
     }
 
     @Override
     public void writeChar(final int v) throws IOException {
         content.writeChar(v);
     }
 
     @Override
     public void writeChars(final String s) throws IOException {
         content.writeChars(s);
     }
 
     @Override
     public void writeDouble(final double v) throws IOException {
         content.writeDouble(v);
     }
 
     @Override
     public void writeFloat(final float v) throws IOException {
         content.writeFloat(v);
     }
 
     @Override
     public void writeInt(final int v) throws IOException {
         content.writeInt(v);
     }
 
     @Override
     public void writeLong(final long v) throws IOException {
         content.writeLong(v);
     }
 
     @Override
     public void writeShort(final int v) throws IOException {
         content.writeShort(v);
     }
 
     @Override
     public void writeUTF(final String str) throws IOException {
         content.writeUTF(str);
     }
 
 }