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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
ListenerMapSourceImpl.java | 100% | 97.7% | 88.9% | 96.9% |
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// Copyright 2005 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package org.apache.tapestry.listener;
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import java.lang.reflect.Method;
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import java.lang.reflect.Modifier;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Comparator;
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import java.util.HashMap;
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import java.util.Iterator;
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import java.util.List;
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import java.util.Map;
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import org.apache.hivemind.util.Defense;
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import org.apache.tapestry.event.ResetEventListener;
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/**
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* @author Howard M. Lewis Ship
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* @since 4.0
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*/
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public class ListenerMapSourceImpl implements ListenerMapSource, ResetEventListener |
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{ |
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/**
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* Sorts {@link Method}s into descending order by parameter count.
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*/
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private static class ParameterCountComparator implements Comparator |
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{ |
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public int compare(Object o1, Object o2) |
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{ |
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Method m1 = (Method) o1; |
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Method m2 = (Method) o2; |
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return m2.getParameterTypes().length - m1.getParameterTypes().length;
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} |
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} |
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/**
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* Keyed on Class, value is a Map. The inner Map is an invoker map ... keyed on listener method
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* name, value is {@link org.apache.tapestry.listener.ListenerMethodInvoker}.
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*/
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private final Map _classToInvokerMap = new HashMap(); |
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public ListenerMap getListenerMapForObject(Object object)
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{ |
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Defense.notNull(object, "object");
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Class objectClass = object.getClass(); |
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Map invokerMap = findInvokerMap(objectClass); |
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return new ListenerMapImpl(object, invokerMap); |
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} |
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public synchronized void resetEventDidOccur() |
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{ |
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_classToInvokerMap.clear(); |
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} |
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private synchronized Map findInvokerMap(Class targetClass) |
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{ |
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Map result = (Map) _classToInvokerMap.get(targetClass); |
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if (result == null) |
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{ |
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result = buildInvokerMapForClass(targetClass); |
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_classToInvokerMap.put(targetClass, result); |
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} |
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return result;
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} |
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private Map buildInvokerMapForClass(Class targetClass)
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{ |
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// map, keyed on method name, value is List of Method
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// only public void methods go into this map.
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Map map = new HashMap();
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Method[] methods = targetClass.getMethods(); |
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// Sort all the arrays, just once, and the methods will be
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// added to the individual lists in the correct order
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// (descending by parameter count).
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Arrays.sort(methods, new ParameterCountComparator());
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for (int i = 0; i < methods.length; i++) |
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{ |
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Method m = methods[i]; |
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if (m.getReturnType() != void.class) |
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continue;
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if (Modifier.isStatic(m.getModifiers()))
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continue;
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String name = m.getName(); |
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addMethodToMappedList(map, m, name); |
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} |
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return convertMethodListMapToInvokerMap(map);
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} |
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private Map convertMethodListMapToInvokerMap(Map map)
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{ |
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Map result = new HashMap();
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Iterator i = map.entrySet().iterator(); |
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while (i.hasNext())
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{ |
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Map.Entry e = (Map.Entry) i.next(); |
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String name = (String) e.getKey(); |
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List methodList = (List) e.getValue(); |
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Method[] methods = convertMethodListToArray(methodList); |
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ListenerMethodInvoker invoker = createListenerMethodInvoker(name, methods); |
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result.put(name, invoker); |
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} |
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return result;
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} |
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/**
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* This implementation returns a new
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* {@link org.apache.tapestry.listener.ListenerMethodInvokerImpl}. Subclasses can override to
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* provide their own implementation.
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*/
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protected ListenerMethodInvokerImpl createListenerMethodInvoker(String name, Method[] methods)
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{ |
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return new ListenerMethodInvokerImpl(name, methods); |
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} |
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private Method[] convertMethodListToArray(List methodList)
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{ |
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int size = methodList.size();
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Method[] result = new Method[size];
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return (Method[]) methodList.toArray(result);
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} |
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private void addMethodToMappedList(Map map, Method m, String name) |
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{ |
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List l = (List) map.get(name); |
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if (l == null) |
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{ |
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l = new ArrayList();
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map.put(name, l); |
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} |
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l.add(m); |
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} |
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} |
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