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.
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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
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040: */
041:
042: package org.netbeans.modules.web.debug.watchesfiltering;
043:
044: import org.netbeans.api.debugger.Watch;
045: import org.netbeans.api.debugger.jpda.InvalidExpressionException;
046: import org.netbeans.api.debugger.jpda.Variable;
047: import org.netbeans.api.debugger.jpda.JPDADebugger;
048: import org.openide.util.WeakListeners;
049:
050: import java.beans.PropertyChangeListener;
051: import java.beans.PropertyChangeEvent;
052:
053: /**
054: * Represents a JSP EL watch.
055: *
056: * @author Maros Sandor
057: */
058: public class JspElWatch implements PropertyChangeListener {
059:
060: private final Watch watch;
061:
062: private boolean evaluated = false;
063: private JPDADebugger debugger;
064: private Variable variable;
065: private Exception exception;
066:
067: public JspElWatch(Watch w, JPDADebugger debugger) {
068: watch = w;
069: this .debugger = debugger;
070: w
071: .addPropertyChangeListener((PropertyChangeListener) WeakListeners
072: .create(PropertyChangeListener.class, this , w));
073: }
074:
075: public String getExpression() {
076: return watch.getExpression();
077: }
078:
079: public String getType() {
080: if (!evaluated) {
081: evaluate();
082: }
083: return variable == null ? "" : variable.getType();
084: }
085:
086: public String getValue() {
087: if (!evaluated) {
088: evaluate();
089: }
090: return variable == null ? "" : variable.getValue();
091: }
092:
093: public String getExceptionDescription() {
094: if (!evaluated) {
095: evaluate();
096: }
097: return exception == null ? null : exception.getMessage();
098: }
099:
100: public String getToStringValue() throws InvalidExpressionException {
101: return getValue().toString();
102: }
103:
104: public Watch getWatch() {
105: return watch;
106: }
107:
108: private synchronized void evaluate() {
109: String text = watch.getExpression();
110: text = org.openide.util.Utilities.replaceString(text, "\"",
111: "\\\"");
112: text = "pageContext.getExpressionEvaluator().evaluate(\""
113: + text
114: + "\", java.lang.String.class, (javax.servlet.jsp.PageContext)pageContext, null)";
115: try {
116: variable = debugger.evaluate(text);
117: exception = null;
118: } catch (Exception e) {
119: exception = e;
120: } finally {
121: evaluated = true;
122: }
123: }
124:
125: public void propertyChange(PropertyChangeEvent evt) {
126: setUnevaluated();
127: }
128:
129: public void setUnevaluated() {
130: evaluated = false;
131: }
132: }
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