Author: tcurdt Date: Fri Nov 5 17:56:59 2004 New Revision: 56723 Added: cocoon/trunk/src/java/org/apache/cocoon/util/ReflectionUtils.java Log: forgot to add the utils
Added: cocoon/trunk/src/java/org/apache/cocoon/util/ReflectionUtils.java ============================================================================== --- (empty file) +++ cocoon/trunk/src/java/org/apache/cocoon/util/ReflectionUtils.java Fri Nov 5 17:56:59 2004 @@ -0,0 +1,137 @@ +/* + * Copyright 1999-2004 The Apache Software Foundation. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.cocoon.util; + +import java.lang.reflect.Field; +import java.lang.reflect.Method; +import java.util.Map; + +/** + * @author tcurdt + * + */ +public final class ReflectionUtils { + + public interface Matcher { + boolean matches(final String pName); + } + + public interface Indexer { + void put(final Map pMap, final String pKey, final Object pObject); + }; + + private static DefaultIndexer defaultIndexer = new DefaultIndexer(); + private static DefaultMatcher defaultMatcher = new DefaultMatcher(); + + private static class DefaultMatcher implements Matcher { + public boolean matches(final String pName) { + return pName.startsWith("do"); + } + } + + private static class DefaultIndexer implements Indexer { + public void put(final Map pMap, final String pKey, final Object pObject) { + + // doAction -> action + final String name = Character.toLowerCase(pKey.charAt(2)) + pKey.substring(3); + + System.out.println("reflecting " + name); + pMap.put(name, pObject); + } + }; + + public static Map discoverFields( + final Class pClazz, + final Matcher pMatcher + ) { + + return discoverFields(pClazz, pMatcher, defaultIndexer); + } + + public static Map discoverFields( + final Class pClazz + ) { + + return discoverFields(pClazz, defaultMatcher, defaultIndexer); + } + + public static Map discoverFields( + final Class pClazz, + final Matcher pMatcher, + final Indexer pIndexer + ) { + + System.out.println("discovering fields on " + pClazz.getName()); + + final Map result = new HashMap(); + + Class current = pClazz; + do { + final Field[] fields = current.getDeclaredFields(); + for (int i = 0; i < fields.length; i++) { + final String fname = fields[i].getName(); + if (pMatcher.matches(fname)) { + pIndexer.put(result, fname, fields[i]); + } + } + current = current.getSuperclass(); + } while(current != null); + + return result; + } + + + public static Map discoverMethods( + final Class pClazz, + final Matcher pMatcher + ) { + + return discoverMethods(pClazz, pMatcher, defaultIndexer); + } + + public static Map discoverMethods( + final Class pClazz + ) { + + return discoverMethods(pClazz, defaultMatcher, defaultIndexer); + } + + public static Map discoverMethods( + final Class pClazz, + final Matcher pMatcher, + final Indexer pIndexer + ) { + + System.out.println("discovering methods on " + pClazz.getName()); + + final Map result = new HashMap(); + + Class current = pClazz; + do { + final Method[] methods = current.getDeclaredMethods(); + for (int i = 0; i < methods.length; i++) { + final String mname = methods[i].getName(); + if (pMatcher.matches(mname)) { + pIndexer.put(result, mname, methods[i]); + } + } + current = current.getSuperclass(); + } while(current != null); + + return result; + } + +}