pojowrapper.java

大名鼎鼎的java动态脚本语言。已经通过了sun的认证

/*
 * Copyright 2006 John G. Wilson
 *
 * 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.wrappers;

import groovy.lang.GroovyObject;
import groovy.lang.MetaClass;

import org.codehaus.groovy.runtime.InvokerHelper;

/**
 * @author John Wilson
 *
 */

public class PojoWrapper extends Wrapper {
  protected MetaClass delegate;
  protected final Object wrapped;
  
  public PojoWrapper(final Object wrapped, final Class constrainedType) {
    super(constrainedType);
    this.wrapped = wrapped;
    this.delegate = InvokerHelper.getMetaClass(wrapped);
    
    /*
     * This check is temporary - remove before 1.0 release
     */
    
    if (wrapped instanceof GroovyObject) {
      throw new RuntimeException("trying to wrap the groovyObject "
                                 + wrapped.getClass().getName()
                                 + " in a PojoWrapper");
    }
  }
  
  public Object unwrap() {
    return this.wrapped;
  }
  
  /**
   * Note the rest of these method will only be used post 1.0
   */

  /* (non-Javadoc)
   * @see groovy.lang.GroovyObject#getProperty(java.lang.String)
   */
  public Object getProperty(final String property) {
    return this.delegate.getProperty(this.wrapped, property);
  }

  /* (non-Javadoc)
   * @see groovy.lang.GroovyObject#invokeMethod(java.lang.String, java.lang.Object)
   */
  public Object invokeMethod(final String methodName, final Object arguments) {
    return this.delegate.invokeMethod(this.wrapped, methodName, arguments);
  }

  /* (non-Javadoc)
   * @see groovy.lang.GroovyObject#setMetaClass(groovy.lang.MetaClass)
   */
  public void setMetaClass(final MetaClass metaClass) {
    this.delegate = metaClass;
  }

  /* (non-Javadoc)
   * @see groovy.lang.GroovyObject#setProperty(java.lang.String, java.lang.Object)
   */
  public void setProperty(final String property, final Object newValue) {
    this.delegate.setProperty(this.wrapped, property, newValue);
  }

  protected Object getWrapped() {
    return this.wrapped;
  }

  protected MetaClass getDelegatedMetaClass() {
    return this.delegate;
  }
}