org.codehaus.groovy.runtime.ConvertedMap Maven / Gradle / Ivy
/*
* 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 java.lang.reflect.Method;
import java.util.Map;
/**
* This class is a general adapter to adapt a map of closures to
* any Java interface.
*
* @author Jochen Theodorou
*/
public class ConvertedMap extends ConversionHandler {
private static final long serialVersionUID = -8131432558241254137L;
/**
* to create a ConvertedMap object.
*
* @param closures the map of closures
*/
protected ConvertedMap(Map closures) {
super(closures);
}
@Override
public Object invokeCustom(Object proxy, Method method, Object[] args)
throws Throwable {
Map m = (Map) getDelegate();
Closure cl = (Closure) m.get(method.getName());
if(cl == null && "toString".equals(method.getName())) {
return m.toString();
}
if (cl == null) {
throw new UnsupportedOperationException();
}
return cl.call(args);
}
@Override
public String toString() {
return DefaultGroovyMethods.toString(getDelegate());
}
@Override
protected boolean checkMethod(Method method) {
return isCoreObjectMethod(method);
}
/**
* Checks whether a method is a core method from java.lang.Object.
* Such methods often receive special treatment because they are
* deemed fundamental enough to not be tampered with.
* call toString() is an exception to allow overriding toString() by a closure specified in the map
*
* @param method the method to check
* @return true if the method is deemed to be a core method
*/
public static boolean isCoreObjectMethod(Method method) {
return ConversionHandler.isCoreObjectMethod(method) && !"toString".equals(method.getName());
}
}