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SnappyData store based off Pivotal GemFireXD

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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.ByteArrayOutputStream;
import java.io.DataInput;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.nio.ByteBuffer;

import com.gemstone.gemfire.internal.tcp.ByteBufferInputStream;

/**
 * Provides byte stream for testing. Use {@link #getDataInput()} and
 * {@link #getDataOutput()} to get DataInput or DataOutput as needed for
 * testing.
 * 
 * @author Kirk Lund
 * @since 7.0
 */
public class ByteArrayData {

  private ByteArrayOutputStream baos;

  public ByteArrayData() {
    this.baos = new ByteArrayOutputStream();
  }

  public int size() {
    return this.baos.size();
  }
  
  public boolean isEmpty() {
    return this.baos.size() == 0;
  }
  
  /**
   * Returns a DataOutput to write to
   */
  public DataOutputStream getDataOutput() {
    return new DataOutputStream(this.baos);
  }

  /**
   * Returns a DataInput to read from
   */
  public DataInput getDataInput() {
    ByteBuffer bb = ByteBuffer.wrap(this.baos.toByteArray());
    ByteBufferInputStream bbis = new ByteBufferInputStream(bb);
    return bbis;
  }

  public DataInputStream getDataInputStream() {
    ByteBuffer bb = ByteBuffer.wrap(this.baos.toByteArray());
    ByteBufferInputStream bbis = new ByteBufferInputStream(bb);
    return new DataInputStream(bbis);
  }

}