/*
 * Copyright 2012 by A-SIT, Secure Information Technology Center Austria
 *
 * 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://joinup.ec.europa.eu/software/page/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.
 */
package at.asit.pdfover.signer;

import java.io.IOException;
import java.io.InputStream;

/**
 * A Document Source
 */
public interface DocumentSource {

	/**
	 * Gets the InputStream for this Document
	 * @return InputStream for the document
	 * @throws IOException
	 */
	public InputStream getInputStream() throws IOException;

	/**
	 * Get Length of document
	 * @return length of the document
	 */
	public int getLength();

	/**
	 * Get Document as byte[]
	 * @return byte[] of the Document
	 */
	public byte[] getByteArray();
}