/**
 * <copyright> Copyright 2006 by Know-Center, Graz, Austria </copyright>
 * PDF-AS has been contracted by the E-Government Innovation Center EGIZ, a
 * joint initiative of the Federal Chancellery Austria and Graz University of
 * Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */
package at.gv.egiz.pdfas.impl.output;

import java.io.ByteArrayOutputStream;
import java.io.OutputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

import at.gv.egiz.pdfas.framework.output.DataSink;
import at.gv.egiz.pdfas.performance.PerformanceCounters;

/**
 * @author wprinz
 *
 */
public class ByteArrayDataSink implements DataSink
{
  /**
   * The log.
   */
  private static final Log log = LogFactory.getLog(ByteArrayDataSink.class);

  protected String mimeType = null;
  protected String characterEncoding = null;
  
  protected ByteArrayOutputStream baos = null;

  
  public ByteArrayDataSink()
  {
    PerformanceCounters.byteArrays.increment();
  }

  /**
   * @see at.gv.egiz.pdfas.framework.output.DataSink#createOutputStream(java.lang.String)
   */
  public OutputStream createOutputStream(String mimeType)
  {
    return createOutputStream(mimeType, null);
  }

  /**
   * @see at.gv.egiz.pdfas.framework.output.DataSink#createOutputStream(java.lang.String, java.lang.String)
   */
  public OutputStream createOutputStream(String mimeType, String characterEncoding)
  {
    this.mimeType = mimeType;
    this.characterEncoding = characterEncoding;
    
    if (this.baos != null)
    {
      log.warn("An output stream is created twice. The old one will be rendered useless.");
    }
    this.baos = new ByteArrayOutputStream(4096);
    return this.baos;
  }
  
  /**
   * Returns the byte array.
   * @return Returns the byte array.
   */
  public byte [] getByteArray ()
  {
    return this.baos.toByteArray();
  }

  /**
   * @return the mimeType
   */
  public String getMimeType()
  {
    return this.mimeType;
  }

  /**
   * @return the characterEncoding
   */
  public String getCharacterEncoding()
  {
    return this.characterEncoding;
  }

}