src/commons/grails/util/ExtendedProxy.java

   1 /*
   2  * Copyright 2004-2005 the original author or authors.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package grails.util;
  17
  18 import groovy.util.Proxy;
  19 import groovy.lang.MetaClass;
  20
  21 import java.util.Map;
  22
  23 import org.codehaus.groovy.runtime.DefaultGroovyMethods;
  24 import org.codehaus.groovy.runtime.InvokerHelper;
  25
  26 /**
  27  * Extends the Groovy Proxy implementation and adds proxying of property getters/setters
  28  *
  29 * @author Graeme Rocher
  30 * @author Jonathan Carlson
  31  *
  32 * @since Oct 20, 2005
  33 */
  34 public class ExtendedProxy extends Proxy {
  35     private Map propertyMap;
  36
  37     public ExtendedProxy() {
  38         super();
  39         this.propertyMap = DefaultGroovyMethods.getProperties(this);
  40     }
  41
  42     public Object getProperty(String property) {
  43         Object propertyValue = propertyMap.get(property);
  44         if(propertyValue == null) {
  45                 propertyValue= InvokerHelper.getMetaClass(getAdaptee()).getProperty(getAdaptee(),property);
  46         }
  47         return propertyValue;
  48     }
  49
  50     public void setProperty(String property, Object newValue) {
  51
  52         if(propertyMap.containsKey(property)) {
  53             super.setProperty(property,newValue);
  54         } else {
  55             InvokerHelper.getMetaClass(getAdaptee()).setProperty(getAdaptee(),property,newValue);
  56         }
  57     }
  58
  59     public void setMetaClass(MetaClass metaClass) {
  60         super.setMetaClass(metaClass);
  61         this.propertyMap = DefaultGroovyMethods.getProperties(this);
  62     }
  63 }