001: /*
002: The contents of this file are subject to the Common Public Attribution License
003: Version 1.0 (the "License"); you may not use this file except in compliance with
004: the License. You may obtain a copy of the License at
005: http://www.projity.com/license . The License is based on the Mozilla Public
006: License Version 1.1 but Sections 14 and 15 have been added to cover use of
007: software over a computer network and provide for limited attribution for the
008: Original Developer. In addition, Exhibit A has been modified to be consistent
009: with Exhibit B.
010:
011: Software distributed under the License is distributed on an "AS IS" basis,
012: WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the
013: specific language governing rights and limitations under the License. The
014: Original Code is OpenProj. The Original Developer is the Initial Developer and
015: is Projity, Inc. All portions of the code written by Projity are Copyright (c)
016: 2006, 2007. All Rights Reserved. Contributors Projity, Inc.
017:
018: Alternatively, the contents of this file may be used under the terms of the
019: Projity End-User License Agreeement (the Projity License), in which case the
020: provisions of the Projity License are applicable instead of those above. If you
021: wish to allow use of your version of this file only under the terms of the
022: Projity License and not to allow others to use your version of this file under
023: the CPAL, indicate your decision by deleting the provisions above and replace
024: them with the notice and other provisions required by the Projity License. If
025: you do not delete the provisions above, a recipient may use your version of this
026: file under either the CPAL or the Projity License.
027:
028: [NOTE: The text of this license may differ slightly from the text of the notices
029: in Exhibits A and B of the license at http://www.projity.com/license. You should
030: use the latest text at http://www.projity.com/license for your modifications.
031: You may not remove this license text from the source files.]
032:
033: Attribution Information: Attribution Copyright Notice: Copyright © 2006, 2007
034: Projity, Inc. Attribution Phrase (not exceeding 10 words): Powered by OpenProj,
035: an open source solution from Projity. Attribution URL: http://www.projity.com
036: Graphic Image as provided in the Covered Code as file: openproj_logo.png with
037: alternatives listed on http://www.projity.com/logo
038:
039: Display of Attribution Information is required in Larger Works which are defined
040: in the CPAL as a work which combines Covered Code or portions thereof with code
041: not governed by the terms of the CPAL. However, in addition to the other notice
042: obligations, all copies of the Covered Code in Executable and Source Code form
043: distributed must, as a form of attribution of the original author, include on
044: each user interface screen the "OpenProj" logo visible to all users. The
045: OpenProj logo should be located horizontally aligned with the menu bar and left
046: justified on the top left of the screen adjacent to the File menu. The logo
047: must be at least 100 x 25 pixels. When users click on the "OpenProj" logo it
048: must direct them back to http://www.projity.com.
049: */
050: package com.projity.transaction;
051:
052: import com.projity.document.Document;
053:
054: /**
055: * Takes care of notifying the creation or deletion of objects
056: */
057: public class MultipleTransactionManager {
058: private static int counter = 0;
059: public static int depth = 0;
060: // Create the listener list
061: protected javax.swing.event.EventListenerList listenerList = new javax.swing.event.EventListenerList();
062:
063: // This methods allows classes to register for MultipleTransactions
064: public void addListener(MultipleTransaction.Listener listener) {
065: listenerList.add(MultipleTransaction.Listener.class, listener);
066: }
067:
068: // This methods allows classes to unregister for MultipleTransactions
069: public void removeListener(MultipleTransaction.Listener listener) {
070: listenerList.remove(MultipleTransaction.Listener.class,
071: listener);
072: }
073:
074: /**
075: * Fire either the beginning or the end of a long transaction
076: * @param source the source of the event
077: * @param id if 0 an new one will be generated and returned
078: * @param begin true if transaction start
079: * @return id generated if begin, or same is input
080: */
081: public int fire(Document source, int id, boolean begin) {
082: if (id == 0)
083: id = ++counter;
084: if (begin)
085: depth++;
086: else
087: depth--;
088: MultipleTransaction evt = MultipleTransaction.getInstance(
089: source, id, begin, depth);
090: Object[] listeners = listenerList.getListenerList();
091: // Each listener occupies two elements - the first is the listener class
092: // and the second is the listener instance
093: for (int i = 0; i < listeners.length; i += 2) {
094: if (listeners[i] == MultipleTransaction.Listener.class) {
095: ((MultipleTransaction.Listener) listeners[i + 1])
096: .multipleTransaction(evt);
097: }
098: }
099: return id;
100: }
101: }
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