/**
 * <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.io;

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

import at.gv.egiz.pdfas.api.io.DataSource;
import at.gv.egiz.pdfas.api.io.TextBased;

/**
 * A String TextBased DataSource.
 * 
 * @author wprinz
 * 
 */
public class StringTextBasedDataSource implements DataSource, TextBased
{
  /**
   * The text.
   */
  protected String text = null;

  protected byte[] cache = null;

  /**
   * @param text
   */
  public StringTextBasedDataSource(String text)
  {
    this.text = text;
  }

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

  /**
   * @see at.gv.egiz.pdfas.api.io.DataSource#getAsByteArray()
   */
  public byte[] getAsByteArray()
  {
    if (cache == null)
    {
      try
      {
        this.cache = this.text.getBytes("UTF-8");
      }
      catch (UnsupportedEncodingException e)
      {
        e.printStackTrace();
        throw new RuntimeException(e);
      }
    }
    return this.cache;
  }

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

  /**
   * @see at.gv.egiz.pdfas.api.io.DataSource#getMimeType()
   */
  public String getMimeType()
  {
    return "text/plain";
  }

  /**
   * @see at.gv.egiz.pdfas.api.io.DataSource#getCharacterEncoding()
   */
  public String getCharacterEncoding()
  {
    return "UTF-8";
  }

  /**
   * @see at.gv.egiz.pdfas.api.io.TextBased#getText()
   */
  public String getText()
  {
    return this.text;
  }

}