org.springsource.loaded.ri.DynamicLookup Maven / Gradle / Ivy
/*
* Copyright 2010-2012 VMware and contributors
*
* 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.springsource.loaded.ri;
import java.lang.reflect.Modifier;
import java.util.List;
/**
* Provides an implementation for dynamic method lookup in a given Method provider.
*
* @author Kris De Volder
* @since 0.5.0
*/
public class DynamicLookup {
private String name;
private String methodDescriptor;
/**
* Create an object capable of performing a dynamic method lookup in some MethodProvider
*
* @param name method name
* @param methodDescriptor method descriptor (e.g. (Ljava/lang/String;)V)
*/
public DynamicLookup(String name, String methodDescriptor) {
this.name = name;
this.methodDescriptor = methodDescriptor;
}
public Invoker lookup(MethodProvider methodProvider) {
List methods = methodProvider.getDeclaredMethods();
for (Invoker invoker : methods) {
if (matches(invoker)) {
return invoker;
}
}
// Try the superclass context
MethodProvider parent = methodProvider.getSuper();
if (parent != null) {
return lookup(parent);
}
return null;
}
protected boolean matches(Invoker invoker) {
return !Modifier.isPrivate(invoker.getModifiers()) && name.equals(invoker.getName())
&& methodDescriptor.equals(invoker.getMethodDescriptor());
}
}