org.codehaus.groovy.runtime.metaclass.MixinInstanceMetaProperty Maven / Gradle / Ivy

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Groovy: A powerful, dynamic language for the JVM
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/*
 *  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.codehaus.groovy.runtime.metaclass;

import groovy.lang.MetaBeanProperty;
import groovy.lang.MetaProperty;
import groovy.lang.MetaMethod;
import org.codehaus.groovy.reflection.MixinInMetaClass;
import org.codehaus.groovy.reflection.CachedClass;
import org.codehaus.groovy.reflection.ReflectionCache;

import java.lang.reflect.Modifier;

/**
 * MetaProperty for mixed in classes
 */
public class MixinInstanceMetaProperty extends MetaBeanProperty {
    public MixinInstanceMetaProperty(MetaProperty property, MixinInMetaClass mixinInMetaClass) {
        super(property.getName(), property.getType(), createGetter(property, mixinInMetaClass), createSetter(property, mixinInMetaClass));
    }

    private static MetaMethod createSetter(final MetaProperty property, final MixinInMetaClass mixinInMetaClass) {
      return new MetaMethod() {
          final String name = getSetterName(property.getName());
          {
              setParametersTypes (new CachedClass [] {ReflectionCache.getCachedClass(property.getType())} );
          }

          public int getModifiers() {
              return Modifier.PUBLIC;
          }

          public String getName() {
              return name;
          }

          public Class getReturnType() {
              return property.getType();
          }

          public CachedClass getDeclaringClass() {
              return mixinInMetaClass.getInstanceClass();
          }

          public Object invoke(Object object, Object[] arguments) {
              property.setProperty(mixinInMetaClass.getMixinInstance(object), arguments[0]);
              return null;
          }
      };
    }

    private static MetaMethod createGetter(final MetaProperty property, final MixinInMetaClass mixinInMetaClass) {
        return new MetaMethod() {
            final String name = getGetterName(property.getName(), property.getType());
            {
                setParametersTypes (CachedClass.EMPTY_ARRAY);
            }

            public int getModifiers() {
                return Modifier.PUBLIC;
            }

            public String getName() {
                return name;
            }

            public Class getReturnType() {
                return property.getType();
            }

            public CachedClass getDeclaringClass() {
                return mixinInMetaClass.getInstanceClass();
            }

            public Object invoke(Object object, Object[] arguments) {
                return property.getProperty(mixinInMetaClass.getMixinInstance(object));
            }
        };
    }
}