act.util.ExceptionComparator Maven / Gradle / Ivy
package act.util;
/*-
* #%L
* ACT Framework
* %%
* Copyright (C) 2014 - 2017 ActFramework
* %%
* 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.
* #L%
*/
import java.util.Comparator;
/**
* Used to sort Exception based on the inheritance hierarchy
*/
public class ExceptionComparator implements Comparator> {
@Override
public int compare(Class o1, Class o2) {
return hierarchicalLevel(o2) - hierarchicalLevel(o1);
}
private static int hierarchicalLevel(Class e) {
int i = 0;
Class c = e;
while (null != c) {
i++;
c = c.getSuperclass();
}
return i;
}
}