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Groovy: A powerful, dynamic language for the JVM

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/*
 * Copyright 2003-2012 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 org.codehaus.groovy.runtime.metaclass;

import groovy.lang.MetaClassImpl;
import groovy.lang.MetaMethod;
import groovy.lang.MetaProperty;

/**
 * Wrapper for a method for a property get or set.
 * WARNING: This class is for internal use only, don't use it for your APIs
 */
public class MethodMetaProperty extends MetaProperty {
    private final MetaMethod method;
    
    public MethodMetaProperty(String name, MetaMethod method) {
        super(name, Object.class);
        this.method = method;
    }

    @Override
    public Object getProperty(Object object) {
        throw new UnsupportedOperationException();
    }

    @Override
    public void setProperty(Object object, Object newValue) {
        throw new UnsupportedOperationException();
    }
    
    public MetaMethod getMetaMethod() {
        return method;
    }
    
    /**
     * Wrapper for a method realizing the property get.
     * WARNING: This class is for internal use only, don't use it for your APIs
     */
    public static class GetMethodMetaProperty extends MethodMetaProperty {

        public GetMethodMetaProperty(String name, MetaMethod theMethod) {
            super(name, theMethod);
        }

        public Object getProperty(Object object) {
            return getMetaMethod().doMethodInvoke(object, new Object[]{name});
        }
    }
    
    /**
     * Wrapper for a method realizing the property getter.
     * WARNING: This class is for internal use only, don't use it for your APIs
     */
    public static class GetBeanMethodMetaProperty extends MethodMetaProperty {
        public GetBeanMethodMetaProperty(String name, MetaMethod theMethod) {
            super(name, theMethod);
        }

        public Object getProperty(Object object) {
            return getMetaMethod().doMethodInvoke(object, MetaClassImpl.EMPTY_ARGUMENTS);
        }
    }

}