/*
* Copyright 2014 NAVER Corp.
* 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 com.navercorp.pinpoint.profiler.objectfactory;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.util.Arrays;
import java.util.Comparator;
/**
* @author Jongho Moon
*
*/
public class ConstructorResolver {
private final Class<?> type;
private final ArgumentsResolver argumentsResolver;
private Constructor<?> resolvedConstructor;
private Object[] resolvedArguments;
public ConstructorResolver(Class<?> type, ArgumentsResolver argumentsResolver) {
this.type = type;
this.argumentsResolver = argumentsResolver;
}
public boolean resolve() {
Constructor<?>[] constructors = (Constructor<?>[]) type.getConstructors();
Arrays.sort(constructors, CONSTRUCTOR_COMPARATOR);
for (Constructor<?> constructor : constructors) {
Class<?>[] types = constructor.getParameterTypes();
Annotation[][] annotations = constructor.getParameterAnnotations();
Object[] resolvedArguments = argumentsResolver.resolve(types, annotations);
if (resolvedArguments != null) {
this.resolvedConstructor = constructor;
this.resolvedArguments = resolvedArguments;
return true;
}
}
return false;
}
public Constructor<?> getResolvedConstructor() {
return resolvedConstructor;
}
public Object[] getResolvedArguments() {
return resolvedArguments;
}
private static final Comparator<Constructor<?>> CONSTRUCTOR_COMPARATOR = new Comparator<Constructor<?>>() {
@Override
public int compare(Constructor<?> o1, Constructor<?> o2) {
int p1 = o1.getParameterTypes().length;
int p2 = o2.getParameterTypes().length;
return (p1 < p2) ? 1 : ((p1 == p2) ? 0 : -1);
}
};
}