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Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
RegisterTagHandler.java | 100% | 100% | 100% | 100% |
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/**
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* Java Gui Builder - A library to build GUIs using an XML file.
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* Copyright 2002, 2003 (C) François Beausoleil
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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package jgb.handlers.swing;
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import jgb.builder.TagHandler;
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import jgb.builder.WindowContext;
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import org.xml.sax.SAXException;
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import java.lang.reflect.InvocationHandler;
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import java.lang.reflect.Method;
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import java.lang.reflect.Proxy;
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import java.util.EventObject;
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import java.util.Map;
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public class RegisterTagHandler extends AbstractTagHandler { |
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public static final String ATTR_METHOD = "method"; |
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public static final String ATTR_MANAGER = "manager"; |
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public static final String ATTR_EVENT = "event"; |
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protected void enterElement(Map atts) throws SAXException { |
38 | 9 |
String className = (String)atts.get(ATTR_CLASS); |
39 | 9 |
String eventName = (String)atts.get(ATTR_EVENT); |
40 | 9 |
String managerName = (String)atts.get(ATTR_MANAGER); |
41 | 9 |
String methodName = (String)atts.get(ATTR_METHOD); |
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43 | 9 |
try {
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Class listenerClass; |
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try {
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listenerClass = Class.forName(className); |
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} catch (ClassNotFoundException e) {
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48 | 2 |
try {
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listenerClass = Class.forName("java.awt.event." + className);
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} catch (ClassNotFoundException e1) {
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51 | 1 |
listenerClass = Class.forName("javax.swing.event." + className);
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} |
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} |
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55 | 9 |
if (!listenerClass.isInterface()) {
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throwParsingException("register listener class must be an interface",
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new IllegalArgumentException(listenerClass.getName()));
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} |
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60 | 8 |
final Object managerObject = getObject(managerName); |
61 | 8 |
final Method reflectedEventMethod = managerObject.getClass() |
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.getMethod(methodName, |
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new Class[]{
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EventObject.class,
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WindowContext.class}
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); |
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final Object listenerInstance = Proxy.newProxyInstance( |
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this.getClass().getClassLoader(),
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new Class[]{listenerClass},
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new EventReflector(
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eventName, managerObject, reflectedEventMethod, |
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(WindowContext)tagContext.get(TagHandler.WINDOW_CONTEXT_KEY) |
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) |
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); |
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final Object parentObject = getCurrentObject(); |
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final Class parentObjectClass = parentObject.getClass(); |
78 | 8 |
final String listenerClassName; |
79 | 8 |
final int lastDot = listenerClass.getName().lastIndexOf('.');
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listenerClassName = listenerClass.getName().substring(1 + lastDot); |
81 | 8 |
final Method addListenerMethod = parentObjectClass.getMethod( |
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"add" + listenerClassName, new Class[]{listenerClass}); |
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addListenerMethod.invoke(parentObject, |
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new Object[]{listenerInstance});
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} catch (SAXException e) {
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86 | 1 |
throw e;
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} catch (Exception e) {
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88 | 1 |
throwParsingException("Unable to register event listener for event " +
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eventName + " on object " + getCurrentObjectId() + " for " + |
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"class " + className, e);
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} |
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} |
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protected void exitElement() throws SAXException { |
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} |
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private static final class EventReflector implements InvocationHandler { |
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private final String eventName;
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private final Object managerObject;
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private final Method reflectedEventMethod;
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private final WindowContext windowContext;
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103 | 8 |
public EventReflector(String eventName, Object managerObject, Method reflectedEventMethod, WindowContext windowContext) {
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104 | 8 |
this.eventName = eventName;
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105 | 8 |
this.managerObject = managerObject;
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106 | 8 |
this.reflectedEventMethod = reflectedEventMethod;
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107 | 8 |
this.windowContext = windowContext;
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} |
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110 | 2 |
public Object invoke(Object proxy, Method method, Object[] args)
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throws Throwable {
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112 | 2 |
if (eventName.equals(method.getName())) {
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113 | 1 |
reflectedEventMethod.invoke( |
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managerObject, |
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new Object[]{args[0], windowContext}
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); |
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} |
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118 | 2 |
return null; |
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} |
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} |
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} |
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