/**
 * <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.input;

import java.io.ByteArrayInputStream;
import java.io.InputStream;

import at.gv.egiz.pdfas.performance.PerformanceCounters;
import at.gv.egiz.pdfas.framework.input.PdfDataSource;

/**
 * Implements a PdfDataSource that holds the whole PDF document in a byte array.
 * 
 * <p>
 * Note that holding the data in a byte array is very memory consuming for large
 * documents.
 * </p>
 * 
 * @author wprinz
 */
public class ByteArrayPdfDataSourceImpl implements PdfDataSource
{
  protected byte[] pdf = null;
  
  public ByteArrayPdfDataSourceImpl(byte[] pdf)
  {
    PerformanceCounters.byteArrays.increment();

    this.pdf = pdf;
  }

  public ByteArrayPdfDataSourceImpl(byte[] pdf, int length)
  {
    PerformanceCounters.byteArrays.increment();

    if (pdf.length == length)
    {
      this.pdf = pdf;
    }
    else
    {
      this.pdf = new byte [length];
      System.arraycopy(pdf, 0, this.pdf, 0, length);
    }
  }


  public InputStream createInputStream()
  {
    ByteArrayInputStream bais = new ByteArrayInputStream(this.pdf);
    return bais;
  }

  public int getLength()
  {
    return this.pdf.length;
  }

  public byte[] getAsByteArray()
  {
    return this.pdf;
  }
  
}