net.bytebuddy.utility.MethodComparator Maven / Gradle / Ivy
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/*
* Copyright 2014 - Present Rafael Winterhalter
*
* 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 net.bytebuddy.utility;
import java.lang.reflect.Method;
import java.util.Comparator;
/**
* A comparator for guaranteeing a stable order for declared {@link Method}s.
*/
public enum MethodComparator implements Comparator {
/**
* The singleton instance.
*/
INSTANCE;
/**
* {@inheritDoc}
*/
public int compare(Method left, Method right) {
if (left == right) {
return 0;
}
int comparison = left.getName().compareTo(right.getName());
if (comparison == 0) {
Class[] leftParameterType = left.getParameterTypes(), rightParameterType = right.getParameterTypes();
if (leftParameterType.length < rightParameterType.length) {
return -1;
} else if (leftParameterType.length > rightParameterType.length) {
return 1;
} else {
for (int index = 0; index < leftParameterType.length; index++) {
int comparisonParameterType = leftParameterType[index].getName().compareTo(rightParameterType[index].getName());
if (comparisonParameterType != 0) {
return comparisonParameterType;
}
}
return left.getReturnType().getName().compareTo(right.getReturnType().getName());
}
} else {
return comparison;
}
}
}