| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.camel.language.juel; |
| |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Modifier; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import javax.el.BeanELResolver; |
| import javax.el.ELContext; |
| import javax.el.PropertyNotFoundException; |
| |
| /** |
| * An extension of the JUEL {@link BeanELResolver} which also supports the resolving of methods |
| * |
| * @version |
| */ |
| public class BeanAndMethodELResolver extends BeanELResolver { |
| public BeanAndMethodELResolver() { |
| super(false); |
| } |
| |
| @Override |
| public Object getValue(ELContext elContext, Object base, Object property) { |
| try { |
| return (property instanceof Method) ? property : super.getValue(elContext, base, property); |
| } catch (PropertyNotFoundException e) { |
| // lets see if its a method call... |
| Method method = findMethod(elContext, base, property); |
| if (method != null) { |
| elContext.setPropertyResolved(true); |
| return method; |
| } else { |
| throw e; |
| } |
| } |
| } |
| |
| protected Method findMethod(ELContext elContext, Object base, Object property) { |
| if (base != null) { |
| Method[] methods = base.getClass().getMethods(); |
| List<Method> matching = new ArrayList<Method>(); |
| for (Method method : methods) { |
| if (method.getName().equals(property.toString()) && Modifier.isPublic(method.getModifiers())) { |
| matching.add(method); |
| } |
| } |
| int size = matching.size(); |
| if (size > 0) { |
| if (size > 1) { |
| // TODO there's currently no way for JUEL to tell us how many parameters there are |
| // so lets just pick the first one that has a single param by default |
| for (Method method : matching) { |
| Class<?>[] paramTypes = method.getParameterTypes(); |
| if (paramTypes.length == 1) { |
| return method; |
| } |
| } |
| } |
| // lets default to the first one |
| return matching.get(0); |
| } |
| } |
| return null; |
| } |
| } |