001: /*
002: * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
003: *
004: * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
005: *
006: * The contents of this file are subject to the terms of either the GNU
007: * General Public License Version 2 only ("GPL") or the Common
008: * Development and Distribution License("CDDL") (collectively, the
009: * "License"). You may not use this file except in compliance with the
010: * License. You can obtain a copy of the License at
011: * http://www.netbeans.org/cddl-gplv2.html
012: * or nbbuild/licenses/CDDL-GPL-2-CP. See the License for the
013: * specific language governing permissions and limitations under the
014: * License. When distributing the software, include this License Header
015: * Notice in each file and include the License file at
016: * nbbuild/licenses/CDDL-GPL-2-CP. Sun designates this
017: * particular file as subject to the "Classpath" exception as provided
018: * by Sun in the GPL Version 2 section of the License file that
019: * accompanied this code. If applicable, add the following below the
020: * License Header, with the fields enclosed by brackets [] replaced by
021: * your own identifying information:
022: * "Portions Copyrighted [year] [name of copyright owner]"
023: *
024: * Contributor(s):
025: *
026: * The Original Software is NetBeans. The Initial Developer of the Original
027: * Software is Sun Microsystems, Inc. Portions Copyright 1997-2006 Sun
028: * Microsystems, Inc. All Rights Reserved.
029: *
030: * If you wish your version of this file to be governed by only the CDDL
031: * or only the GPL Version 2, indicate your decision by adding
032: * "[Contributor] elects to include this software in this distribution
033: * under the [CDDL or GPL Version 2] license." If you do not indicate a
034: * single choice of license, a recipient has the option to distribute
035: * your version of this file under either the CDDL, the GPL Version 2 or
036: * to extend the choice of license to its licensees as provided above.
037: * However, if you add GPL Version 2 code and therefore, elected the GPL
038: * Version 2 license, then the option applies only if the new code is
039: * made subject to such option by the copyright holder.
040: */
041:
042: package org.netbeans.modules.refactoring.api.impl;
043:
044: import java.util.ArrayList;
045: import java.util.Iterator;
046: import org.netbeans.modules.refactoring.api.ProgressEvent;
047: import org.netbeans.modules.refactoring.api.ProgressListener;
048: import org.openide.ErrorManager;
049:
050: /**
051: * Support class for progress notifications
052: * @author Martin Matula, Jan Becicka
053: */
054: public final class ProgressSupport {
055: /** Utility field holding list of ProgressListeners. */
056: private transient ArrayList progressListenerList = null;
057: private int counter;
058:
059: public ProgressSupport() {
060: progressListenerList = new ArrayList();
061: }
062:
063: public synchronized void addProgressListener(
064: ProgressListener listener) {
065: progressListenerList.add(listener);
066: }
067:
068: /** Removes ProgressListener from the list of listeners.
069: * @param listener The listener to remove.
070: *
071: */
072: public synchronized void removeProgressListener(
073: ProgressListener listener) {
074: progressListenerList.remove(listener);
075: }
076:
077: /** Notifies all registered listeners about the event.
078: *
079: * @param type Type of operation that is starting.
080: * @param count Number of steps the operation consists of.
081: *
082: */
083: public void fireProgressListenerStart(Object source, int type,
084: int count) {
085: counter = -1;
086: ArrayList list;
087: ProgressEvent event = new ProgressEvent(source,
088: ProgressEvent.START, type, count);
089: synchronized (this ) {
090: list = (ArrayList) progressListenerList.clone();
091: }
092: for (Iterator it = list.iterator(); it.hasNext();) {
093: try {
094: ((ProgressListener) it.next()).start(event);
095: } catch (RuntimeException e) {
096: ErrorManager.getDefault().notify(
097: ErrorManager.INFORMATIONAL, e);
098: }
099: }
100: }
101:
102: /** Notifies all registered listeners about the event.
103: *
104: * @param type Type of operation that is starting.
105: * @param count Number of steps the operation consists of.
106: *
107: */
108: public void fireProgressListenerStart(int type, int count) {
109: fireProgressListenerStart(this , type, count);
110: }
111:
112: /** Notifies all registered listeners about the event.
113: */
114: public void fireProgressListenerStep(Object source, int count) {
115: counter = count;
116: ArrayList list;
117: ProgressEvent event = new ProgressEvent(source,
118: ProgressEvent.STEP, 0, count);
119: synchronized (this ) {
120: list = (ArrayList) progressListenerList.clone();
121: }
122: for (Iterator it = list.iterator(); it.hasNext();) {
123: try {
124: ((ProgressListener) it.next()).step(event);
125: } catch (RuntimeException e) {
126: ErrorManager.getDefault().notify(
127: ErrorManager.INFORMATIONAL, e);
128: }
129: }
130: }
131:
132: /** Notifies all registered listeners about the event.
133: */
134: public void fireProgressListenerStep(Object source) {
135: fireProgressListenerStep(source, counter + 1);
136: }
137:
138: /** Notifies all registered listeners about the event.
139: */
140: public void fireProgressListenerStop(Object source) {
141: ArrayList list;
142: ProgressEvent event = new ProgressEvent(source,
143: ProgressEvent.STOP);
144: synchronized (this ) {
145: list = (ArrayList) progressListenerList.clone();
146: }
147: for (Iterator it = list.iterator(); it.hasNext();) {
148: try {
149: ((ProgressListener) it.next()).stop(event);
150: } catch (RuntimeException e) {
151: ErrorManager.getDefault().notify(
152: ErrorManager.INFORMATIONAL, e);
153: }
154: }
155: }
156:
157: /** Notifies all registered listeners about the event.
158: */
159: public void fireProgressListenerStop() {
160: fireProgressListenerStop(this);
161: }
162: }
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