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.api.debugger;
043:
044: import java.beans.PropertyChangeListener;
045: import java.beans.PropertyChangeSupport;
046:
047: /**
048: * Abstract definition of watch. Each watch is created for
049: * one String which contains the name of variable or some expression.
050: *
051: * @author Jan Jancura
052: */
053: public final class Watch {
054:
055: /** Name of the property for the watched expression. */
056: public static final String PROP_EXPRESSION = "expression"; // NOI18N
057: /** Name of the property for the value of the watched expression. This constant is not used at all. */
058: public static final String PROP_VALUE = "value"; // NOI18N
059:
060: private String expression;
061: private PropertyChangeSupport pcs;
062:
063: Watch(String expr) {
064: this .expression = expr;
065: pcs = new PropertyChangeSupport(this );
066: }
067:
068: /**
069: * Return expression this watch is created for.
070: *
071: * @return expression this watch is created for
072: */
073: public String getExpression() {
074: return expression;
075: }
076:
077: /**
078: * Set the expression to watch.
079: *
080: * @param expression expression to watch
081: */
082: public void setExpression(String expression) {
083: String old = this .expression;
084: this .expression = expression;
085: pcs.firePropertyChange(PROP_EXPRESSION, old, expression);
086: }
087:
088: /**
089: * Remove the watch from the list of all watches in the system.
090: */
091: public void remove() {
092: DebuggerManager dm = DebuggerManager.getDebuggerManager();
093: dm.removeWatch(this );
094: }
095:
096: /**
097: * Add a property change listener.
098: *
099: * @param l the listener to add
100: */
101: public void addPropertyChangeListener(PropertyChangeListener l) {
102: pcs.addPropertyChangeListener(l);
103: }
104:
105: /**
106: * Remove a property change listener.
107: *
108: * @param l the listener to remove
109: */
110: public void removePropertyChangeListener(PropertyChangeListener l) {
111: pcs.removePropertyChangeListener(l);
112: }
113: }
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