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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * 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. See accompanying
 * LICENSE file.
 */

package com.gemstone.gemfire.internal;

import java.io.IOException;
import java.io.ObjectInput;

import com.gemstone.gemfire.internal.shared.Version;

/**
 * An extension to {@link ObjectInput} that implements
 * {@link VersionedDataStream} wrapping given {@link ObjectInput} for a stream
 * coming from a different product version.
 * 
 * @author swale
 * @since 7.1
 */
public final class VersionedObjectInput implements ObjectInput,
    VersionedDataStream {

  private final ObjectInput in;
  private final Version version;

  /**
   * Creates a VersionedObjectInput that wraps the specified underlying
   * ObjectInput.
   * 
   * @param in
   *          the specified {@link ObjectInput}
   * @param version
   *          the product version that serialized object on the given
   *          {@link ObjectInput}
   */
  public VersionedObjectInput(ObjectInput in, Version version) {
    this.in = in;
    this.version = version;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public Version getVersion() {
    return this.version;
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void readFully(byte[] b) throws IOException {
    this.in.readFully(b);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void readFully(byte[] b, int off, int len) throws IOException {
    this.in.readFully(b, off, len);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int skipBytes(int n) throws IOException {
    return this.in.skipBytes(n);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public boolean readBoolean() throws IOException {
    return this.in.readBoolean();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public byte readByte() throws IOException {
    return this.in.readByte();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int readUnsignedByte() throws IOException {
    return this.in.readUnsignedByte();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public short readShort() throws IOException {
    return this.in.readShort();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int readUnsignedShort() throws IOException {
    return this.in.readUnsignedShort();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public char readChar() throws IOException {
    return this.in.readChar();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int readInt() throws IOException {
    return this.in.readInt();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public long readLong() throws IOException {
    return this.in.readLong();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public float readFloat() throws IOException {
    return this.in.readFloat();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public double readDouble() throws IOException {
    return this.in.readDouble();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public String readLine() throws IOException {
    return this.in.readLine();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public String readUTF() throws IOException {
    return this.in.readUTF();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public Object readObject() throws ClassNotFoundException, IOException {
    return this.in.readObject();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int read() throws IOException {
    return this.in.read();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int read(byte[] b) throws IOException {
    return this.in.read(b);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int read(byte[] b, int off, int len) throws IOException {
    return this.in.read(b, off, len);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public long skip(long n) throws IOException {
    return this.in.skip(n);
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public int available() throws IOException {
    return this.in.available();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public void close() throws IOException {
    this.in.close();
  }

  /**
   * {@inheritDoc}
   */
  @Override
  public String toString() {
    return "VersionedObjectInput@"
        + Integer.toHexString(System.identityHashCode(this)) + " ("
        + this.version + ')';
  }
}