| /* |
| * $Id$ |
| * |
| * 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.tiles.mvel; |
| |
| import java.beans.PropertyDescriptor; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| |
| import org.apache.tiles.context.TilesRequestContextHolder; |
| import org.apache.tiles.request.ApplicationContext; |
| import org.apache.tiles.request.Request; |
| import org.apache.tiles.request.reflect.CannotAccessMethodException; |
| import org.apache.tiles.util.CombinedBeanInfo; |
| import org.mvel2.integration.VariableResolver; |
| |
| /** |
| * Resolves {@link org.apache.tiles.request.Request} and |
| * {@link org.apache.tiles.request.ApplicationContext} properties as variables. |
| * |
| * @version $Rev$ $Date$ |
| * @since 2.2.0 |
| */ |
| public class TilesContextVariableResolverFactory extends |
| ReadOnlyVariableResolverFactory { |
| |
| /** |
| * Beaninfo about {@link org.apache.tiles.request.Request} and |
| * {@link org.apache.tiles.request.ApplicationContext}. |
| */ |
| private CombinedBeanInfo requestBeanInfo = new CombinedBeanInfo( |
| Request.class, ApplicationContext.class); |
| |
| /** |
| * Constructor. |
| * |
| * @param requestHolder The Tiles request holder. |
| * @since 2.2.0 |
| */ |
| public TilesContextVariableResolverFactory(TilesRequestContextHolder requestHolder) { |
| super(requestHolder); |
| } |
| |
| /** {@inheritDoc} */ |
| public boolean isTarget(String name) { |
| return requestBeanInfo.getMappedDescriptors(Request.class).containsKey( |
| name) |
| || requestBeanInfo.getMappedDescriptors( |
| ApplicationContext.class).containsKey(name); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public VariableResolver createVariableResolver(String name) { |
| VariableResolver resolver = null; |
| PropertyDescriptor descriptor = requestBeanInfo.getMappedDescriptors(Request.class).get(name); |
| if (descriptor != null) { |
| resolver = new RequestVariableResolver(name, descriptor); |
| } else { |
| descriptor = requestBeanInfo.getMappedDescriptors(ApplicationContext.class).get(name); |
| if (descriptor != null) { |
| resolver = new ApplicationVariableResolver(name, descriptor); |
| } |
| } |
| return resolver; |
| } |
| |
| /** |
| * Resolves a {@link org.apache.tiles.request.Request} property as a variable. |
| * |
| * @version $Rev$ $Date$ |
| * @since 2.2.0 |
| */ |
| private class RequestVariableResolver extends ReadOnlyVariableResolver { |
| |
| /** |
| * The property descriptor. |
| */ |
| private PropertyDescriptor descriptor; |
| |
| /** |
| * Constructor. |
| * |
| * @param name The name of the property. |
| * @param descriptor The property descriptor. |
| * @since 2.2.0 |
| */ |
| public RequestVariableResolver(String name, PropertyDescriptor descriptor) { |
| super(name); |
| this.descriptor = descriptor; |
| } |
| |
| /** {@inheritDoc} */ |
| @SuppressWarnings("rawtypes") |
| public Class getType() { |
| return descriptor.getPropertyType(); |
| } |
| |
| /** {@inheritDoc} */ |
| public Object getValue() { |
| Method method = descriptor.getReadMethod(); |
| try { |
| return method.invoke(requestHolder.getTilesRequestContext()); |
| } catch (IllegalArgumentException e) { |
| throw new CannotAccessMethodException( |
| "Arguments are wrong for property '" |
| + descriptor.getName() + "'", e); |
| } catch (IllegalAccessException e) { |
| throw new CannotAccessMethodException( |
| "Cannot access getter method for property '" |
| + descriptor.getName() + "'", e); |
| } catch (InvocationTargetException e) { |
| throw new CannotAccessMethodException( |
| "The getter method for property '" |
| + descriptor.getName() + "' threw an exception", |
| e); |
| } |
| } |
| } |
| |
| /** |
| * Resolves a {@link org.apache.tiles.request.ApplicationContext} property as a |
| * variable. |
| * |
| * @version $Rev$ $Date$ |
| * @since 2.2.0 |
| */ |
| private class ApplicationVariableResolver extends ReadOnlyVariableResolver { |
| |
| /** |
| * The property descriptor. |
| * |
| * @since 2.2.0 |
| */ |
| private PropertyDescriptor descriptor; |
| |
| /** |
| * Constructor. |
| * |
| * @param name The name of the property. |
| * @param descriptor The property descriptor. |
| * @since 2.2.0 |
| */ |
| public ApplicationVariableResolver(String name, PropertyDescriptor descriptor) { |
| super(name); |
| this.descriptor = descriptor; |
| } |
| |
| /** {@inheritDoc} */ |
| @SuppressWarnings("rawtypes") |
| public Class getType() { |
| return descriptor.getPropertyType(); |
| } |
| |
| /** {@inheritDoc} */ |
| public Object getValue() { |
| Method method = descriptor.getReadMethod(); |
| try { |
| return method.invoke(requestHolder.getTilesRequestContext() |
| .getApplicationContext()); |
| } catch (IllegalArgumentException e) { |
| throw new CannotAccessMethodException( |
| "Arguments are wrong for property '" |
| + descriptor.getName() + "'", e); |
| } catch (IllegalAccessException e) { |
| throw new CannotAccessMethodException( |
| "Cannot access getter method for property '" |
| + descriptor.getName() + "'", e); |
| } catch (InvocationTargetException e) { |
| throw new CannotAccessMethodException( |
| "The getter method for property '" |
| + descriptor.getName() + "' threw an exception", |
| e); |
| } |
| } |
| } |
| } |