/**
 * 
 */
package at.gv.egiz.pdfas.framework.input;

import java.io.InputStream;

/**
 * The input document data source.
 * 
 * <p>
 * Usually this is a PdfDataSource, but it may be a TextDataSource as well.
 * </p>
 * 
 * @author wprinz
 * 
 */
public interface DataSource
{
  /**
   * Creates a new InputStream that allows to read out the document's binary
   * data from the beginning.
   * 
   * @return Returns the InputStream with the binary data.
   */
  public InputStream createInputStream();

  /**
   * Returns the length (number of bytes) of the stream.
   * 
   * @return Returns the length (number of bytes) of the stream.
   */
  public int getLength();

}