| package org.apache.velocity.util.introspection; |
| |
| /* |
| * 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. |
| */ |
| |
| import java.util.Iterator; |
| |
| import org.apache.velocity.runtime.RuntimeServices; |
| import org.apache.velocity.util.RuntimeServicesAware; |
| |
| /** |
| * <p> |
| * When the runtime.introspection.uberspect configuration property contains several |
| * uberspector class names, it means those uberspectors will be chained. When an |
| * uberspector in the list other than the leftmost does not implement ChainableUberspector, |
| * then this utility class is used to provide a basic default chaining where the |
| * first non-null result is kept for each introspection call. |
| * </p> |
| * |
| * @since 1.6 |
| * @see ChainableUberspector |
| * @version $Id: LinkingUberspector.java 10959 2008-07-01 00:12:29Z sdumitriu $ |
| */ |
| public class LinkingUberspector extends AbstractChainableUberspector |
| { |
| private Uberspect leftUberspect; |
| private Uberspect rightUberspect; |
| |
| /** |
| * Constructor that takes the two uberspectors to link |
| */ |
| public LinkingUberspector(Uberspect left,Uberspect right) { |
| leftUberspect = left; |
| rightUberspect = right; |
| } |
| |
| /** |
| * {@inheritDoc} |
| * <p> |
| * Init both wrapped uberspectors |
| * </p> |
| * |
| * @see org.apache.velocity.util.introspection.Uberspect#init() |
| */ |
| //@Override |
| public void init() throws Exception |
| { |
| leftUberspect.init(); |
| rightUberspect.init(); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.apache.velocity.util.introspection.Uberspect#getIterator(java.lang.Object, |
| * org.apache.velocity.util.introspection.Info) |
| */ |
| //@SuppressWarnings("unchecked") |
| //@Override |
| public Iterator getIterator(Object obj, Info i) throws Exception |
| { |
| Iterator it = leftUberspect.getIterator(obj,i); |
| return it != null ? it : rightUberspect.getIterator(obj,i); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.apache.velocity.util.introspection.Uberspect#getMethod(java.lang.Object, java.lang.String, |
| * java.lang.Object[], org.apache.velocity.util.introspection.Info) |
| */ |
| //@Override |
| public VelMethod getMethod(Object obj, String methodName, Object[] args, Info i) throws Exception |
| { |
| VelMethod method = leftUberspect.getMethod(obj,methodName,args,i); |
| return method != null ? method : rightUberspect.getMethod(obj,methodName,args,i); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.apache.velocity.util.introspection.Uberspect#getPropertyGet(java.lang.Object, java.lang.String, |
| * org.apache.velocity.util.introspection.Info) |
| */ |
| //@Override |
| public VelPropertyGet getPropertyGet(Object obj, String identifier, Info i) throws Exception |
| { |
| VelPropertyGet getter = leftUberspect.getPropertyGet(obj,identifier,i); |
| return getter != null ? getter : rightUberspect.getPropertyGet(obj,identifier,i); |
| } |
| |
| /** |
| * {@inheritDoc} |
| * |
| * @see org.apache.velocity.util.introspection.Uberspect#getPropertySet(java.lang.Object, java.lang.String, |
| * java.lang.Object, org.apache.velocity.util.introspection.Info) |
| */ |
| //@Override |
| public VelPropertySet getPropertySet(Object obj, String identifier, Object arg, Info i) throws Exception |
| { |
| VelPropertySet setter = leftUberspect.getPropertySet(obj,identifier,arg,i); |
| return setter != null ? setter : rightUberspect.getPropertySet(obj,identifier,arg,i); |
| } |
| } |