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Groovy example source code file (MixinInstanceMetaProperty.java)

This example Groovy source code file (MixinInstanceMetaProperty.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Groovy tags/keywords

cachedclass, cachedclass, class, metabeanproperty, metamethod, metamethod, metaproperty, mixininmetaclass, mixininstancemetaproperty, object, object, reflection, string, string

The Groovy MixinInstanceMetaProperty.java source code

/*
 * Copyright 2003-2010 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.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 (new CachedClass [0]);
            }

            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));
            }
        };
    }
}

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