org.springsource.loaded.ri.GetMethodsLookup 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.Collection;
import java.util.HashMap;
import java.util.Map;
/**
* @author Kris De Volder
* @since 0.5.0
*
*/
public class GetMethodsLookup {
public Collection lookup(MethodProvider methodProvider) {
Map found = new HashMap();
collectAll(methodProvider, found);
return found.values();
}
/**
* Collect all public methods from methodProvider and its supertypes into the 'found' hasmap, indexed by "name+descriptor".
*/
private void collectAll(MethodProvider methodProvider, Map found) {
//We do this in inverse order as in 'GetMethodLookup'. This is because GetMethodLookup
//is lazy and wants to stop when a method is found, but here we instead collect
//verything bottom up and 'overwrite' earlier results so the last one found is the
//one kept.
//First interfaces in inverse order...
MethodProvider[] itfs = methodProvider.getInterfaces();
for (int i = itfs.length - 1; i >= 0; i--) { // inverse order
collectAll(itfs[i], found);
}
//Then the superclass(es), but only if we're not an interface (interfaces do not report
// the methods of Object!
MethodProvider supr = methodProvider.getSuper();
if (supr != null && !methodProvider.isInterface()) {
collectAll(supr, found);
}
//Finally all our own public methods
for (Invoker method : methodProvider.getDeclaredMethods()) {
if (Modifier.isPublic(method.getModifiers())) {
found.put(method.getName() + method.getMethodDescriptor(), method);
}
}
}
}