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Groovy: A powerful, dynamic language for the JVM
/**
* 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;
import groovy.lang.Closure;
import groovy.lang.MetaMethod;
import java.util.List;
/**
* Represents a method on an object using a closure which can be invoked
* at any time
*
* @author James Strachan
*/
public class MethodClosure extends Closure {
public static boolean ALLOW_RESOLVE = false;
private static final Class[] EMPTY_CLASS_ARRAY = new Class[0];
private String method;
public MethodClosure(Object owner, String method) {
super(owner);
this.method = method;
final Class clazz = owner.getClass()==Class.class?(Class) owner:owner.getClass();
maximumNumberOfParameters = 0;
parameterTypes = EMPTY_CLASS_ARRAY;
List methods = InvokerHelper.getMetaClass(clazz).respondsTo(owner, method);
for(MetaMethod m : methods) {
if (m.getParameterTypes().length > maximumNumberOfParameters) {
Class[] pt = m.getNativeParameterTypes();
maximumNumberOfParameters = pt.length;
parameterTypes = pt;
}
}
}
public String getMethod() {
return method;
}
protected Object doCall(Object arguments) {
return InvokerHelper.invokeMethod(getOwner(), method, arguments);
}
private Object readResolve() {
if (ALLOW_RESOLVE) {
return this;
}
throw new UnsupportedOperationException();
}
public Object getProperty(String property) {
if ("method".equals(property)) {
return getMethod();
} else return super.getProperty(property);
}
}