001/* MultiDoc.java -- 002 Copyright (C) 2004, 2006 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038 039package javax.print; 040 041import java.io.IOException; 042 043 044/** 045 * <code>MultiDoc</code> defines the interface for objects providing multiple 046 * documents for use in a print job. 047 * <p> 048 * Implementations of this interface are used to pass multiple documents, to be 049 * printed as one print job, to the <code>MultiDocPrintJob</code> instance. 050 * </p><p> 051 * There exists no implementation of this interface in the Java Print Service 052 * API. Implementors may assume the following usage in print jobs and the needed 053 * behaviour for implementations: The print job fetches the single documents via 054 * iteration by consecutive calls of the {@link #getDoc()} method to obtain the 055 * current document follwing calls of the {@link #next()} method to get the next 056 * multidoc object for the next <code>getDoc()</code> method call (if returned 057 * multidoc object is not <code>null</code>). The print service will fetch the 058 * document object and then retrieve the print data from the document before it 059 * proceeds with the next call for the next MultiDoc object in the sequence. 060 * </p><p> 061 * Implementations of this interface have to be multiple thread-safe. 062 * </p> 063 * 064 * @author Michael Koch (konqueror@gmx.de) 065 */ 066public interface MultiDoc 067{ 068 /** 069 * Returns the current document. 070 * 071 * @return The current document. 072 * 073 * @throws IOException if an error occurs 074 */ 075 Doc getDoc() throws IOException; 076 077 /** 078 * Returns the next <code>MultiDoc</code> object that contains the 079 * next document for retrieval. 080 * 081 * @return The next <code>MultiDoc</code> object, or <code>null</code> 082 * if no more documents are available. 083 * 084 * @throws IOException if an error occurs 085 */ 086 MultiDoc next() throws IOException; 087}