/**
 * <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.api.commons;

import java.io.InputStream;

import at.gv.egiz.pdfas.framework.input.PdfDataSource;
import at.gv.egiz.pdfas.framework.input.TextDataSource;

/**
 * Adapter that converts a framework DataSource to an API PdfDataSource.
 * 
 * @author wprinz
 */
public class DataSourceApiAdapter implements at.gv.egiz.pdfas.api.io.DataSource
{
  /**
   * The framework DataSource to be adapted to an API DataSource.
   */
  protected at.gv.egiz.pdfas.framework.input.DataSource frameworkDataSource = null;

  /**
   * Constructor.
   * 
   * @param frameworkDataSource
   *          The framework DataSource to be adapted to an API DataSource.
   */
  public DataSourceApiAdapter(at.gv.egiz.pdfas.framework.input.DataSource frameworkDataSource)
  {
    this.frameworkDataSource = frameworkDataSource;
  }

  /**
   * @see at.gv.egiz.pdfas.api.io.DataSource#createInputStream()
   */
  public InputStream createInputStream()
  {
    return this.frameworkDataSource.createInputStream();
  }

  /**
   * @see at.gv.egiz.pdfas.api.io.DataSource#getAsByteArray()
   */
  public byte[] getAsByteArray()
  {
    return this.frameworkDataSource.getAsByteArray();
  }

  /**
   * @see at.gv.egiz.pdfas.api.io.DataSource#getLength()
   */
  public int getLength()
  {
    return this.frameworkDataSource.getLength();
  }

  public String getCharacterEncoding()
  {
    if (this.frameworkDataSource instanceof PdfDataSource)
    {
      return null;
    }
    if (this.frameworkDataSource instanceof TextDataSource)
    {
      return "UTF-8";
    }
    return null;
  }

  public String getMimeType()
  {
    if (this.frameworkDataSource instanceof PdfDataSource)
    {
      return "application/pdf";
    }
    if (this.frameworkDataSource instanceof TextDataSource)
    {
      return "text/plain";
    }

    return null;
  }

}