/**
 * 
 */
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;
  }

}