ExtendedProxy.java

/*
 * Copyright 2004-2005 the original author or authors.
 *
 * 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 grails.util;

import groovy.lang.MetaClass;
import groovy.util.Proxy;

import java.util.Map;

import org.codehaus.groovy.runtime.DefaultGroovyMethods;
import org.codehaus.groovy.runtime.InvokerHelper;

/**
 * Extends the Groovy Proxy implementation and adds proxying of property getters/setters.
 *
 * @author Graeme Rocher
 * @author Jonathan Carlson
 */
public class ExtendedProxy extends Proxy {

    @SuppressWarnings("rawtypes")
    private Map propertyMap;

    public ExtendedProxy() {
        propertyMap = DefaultGroovyMethods.getProperties(this);
    }

    @Override
    public Object getProperty(String property) {
        Object propertyValue = propertyMap.get(property);
        if (propertyValue == null) {
            propertyValue = InvokerHelper.getMetaClass(getAdaptee()).getProperty(getAdaptee(),property);
        }
        return propertyValue;
    }

    @Override
    public void setProperty(String property, Object newValue) {
        if (propertyMap.containsKey(property)) {
            super.setProperty(property,newValue);
        }
        else {
            InvokerHelper.getMetaClass(getAdaptee()).setProperty(getAdaptee(),property,newValue);
        }
    }

    @Override
    public void setMetaClass(MetaClass metaClass) {
        super.setMetaClass(metaClass);
        propertyMap = DefaultGroovyMethods.getProperties(this);
    }
}