J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2001 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package javax.print; |
| 27 | |
| 28 | /** |
| 29 | * This interface is used by a printing application to cancel a |
| 30 | * print job. This interface extends {@link DocPrintJob}. A |
| 31 | * <code>DocPrintJob</code> implementation returned from a print |
| 32 | * service implements this interface if the print job can be |
| 33 | * cancelled. Before trying to cancel |
| 34 | * a print job, the client needs to test if the |
| 35 | * <code>DocPrintJob</code> object returned from the print service |
| 36 | * actually implements this interface. Clients should never assume |
| 37 | * that a <code>DocPrintJob</code> implements this interface. A |
| 38 | * print service might support cancellation only for certain types |
| 39 | * of print data and representation class names. This means that |
| 40 | * only some of the <code>DocPrintJob</code> objects returned from |
| 41 | * a service will implement this interface. |
| 42 | * <p> |
| 43 | * Service implementors are encouraged to implement this optional interface |
| 44 | * and to deliver a javax.print.event.PrintJobEvent.JOB_CANCELLED event |
| 45 | * to any listeners if a job is successfully cancelled with an |
| 46 | * implementation of this interface. Services should also note that an |
| 47 | * implementation of this method may be made from a separate client thread |
| 48 | * than that which made the print request. Thus the implementation of |
| 49 | * this interface must be made thread safe. |
| 50 | */ |
| 51 | |
| 52 | public interface CancelablePrintJob extends DocPrintJob { |
| 53 | |
| 54 | /** |
| 55 | * Stops further processing of a print job. |
| 56 | * <p> |
| 57 | * If a service supports this method it cannot be concluded that |
| 58 | * job cancellation will always suceeed. A job may not be able to be |
| 59 | * cancelled once it has reached and passed some point in its processing. |
| 60 | * A successful cancellation means only that the entire job was not |
| 61 | * printed, some portion may already have printed when cancel returns. |
| 62 | * <p> |
| 63 | * The service will throw a PrintException if the cancellation did not |
| 64 | * succeed. A job which has not yet been submitted for printing should |
| 65 | * throw this exception. |
| 66 | * Cancelling an already successfully cancelled Print Job is not |
| 67 | * considered an error and will always succeed. |
| 68 | * <p> |
| 69 | * Cancellation in some services may be a lengthy process, involving |
| 70 | * requests to a server and processing of its print queue. Clients |
| 71 | * may wish to execute cancel in a thread which does not affect |
| 72 | * application execution. |
| 73 | * @throws PrintException if the job could not be successfully cancelled. |
| 74 | */ |
| 75 | public void cancel() throws PrintException; |
| 76 | |
| 77 | } |