/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.neethi.util;
import java.util.Iterator;
import java.util.List;
import org.apache.neethi.All;
import org.apache.neethi.Assertion;
import org.apache.neethi.ExactlyOne;
import org.apache.neethi.Policy;
import org.apache.neethi.PolicyComponent;
/**
* A Utility class that provides methods the check the equality of
* PolicyComponents.
*
*/
public class PolicyComparator {
/**
* Returns <tt>true</tt> if the two policies have the same semantics
*
* @param arg1
* a Policy
* @param arg2
* an another Policy
* @return <tt>true</tt> if both policies have the same semantics
*/
public static boolean compare(Policy arg1, Policy arg2) {
// check Name attributes of each policies
if (arg1.getName() != null) {
if (arg2.getName() != null) {
arg1.getName().equals(arg2.getName());
} else {
return false;
}
} else {
if (arg2.getName() != null) {
return false;
}
}
// check Id attributes of each policies
if (arg1.getId() != null) {
if (arg2.getId() != null) {
arg1.getId().equals(arg2.getId());
} else {
return false;
}
} else {
if (arg2.getId() != null) {
return false;
}
}
return compare(arg1.getPolicyComponents(), arg2.getPolicyComponents());
}
/**
* Returns <tt>true</tt> if the two PolicyComponents have the same
* semantics.
*
* @param arg1
* a PolicyComponent
* @param arg2
* an another PolicyComponent
* @return <tt>true</tt> if both PolicyComponents have the same semantics
*/
public static boolean compare(PolicyComponent arg1, PolicyComponent arg2) {
if (!arg1.getClass().equals(arg2.getClass())) {
return false;
}
if (arg1 instanceof Policy) {
return compare((Policy) arg1, (Policy) arg2);
} else if (arg1 instanceof All) {
return compare((All) arg1, (All) arg2);
} else if (arg1 instanceof ExactlyOne) {
return compare((ExactlyOne) arg1, (ExactlyOne) arg2);
} else if (arg1 instanceof Assertion) {
return compare((Assertion) arg1, (Assertion) arg2);
} else {
// TODO should I throw an exception ..
}
return false;
}
public static boolean compare(All arg1, All arg2) {
return compare(arg1.getPolicyComponents(), arg2.getPolicyComponents());
}
public static boolean compare(ExactlyOne arg1, ExactlyOne arg2) {
return compare(arg1.getPolicyComponents(), arg2.getPolicyComponents());
}
public static boolean compare(Assertion arg1, Assertion arg2) {
if (!(arg1.getName().equals(arg2.getName()))) {
return false;
}
return true;
}
private static boolean compare(List arg1, List arg2) {
if (arg1.size() != arg2.size()) {
return false;
}
Iterator iterator = arg1.iterator();
PolicyComponent assertion1;
while (iterator.hasNext()) {
assertion1 = (PolicyComponent) iterator.next();
Iterator iterator2 = arg2.iterator();
boolean match = false;
PolicyComponent assertion2;
while (iterator2.hasNext()) {
assertion2 = (PolicyComponent) iterator2.next();
if (compare(assertion1, assertion2)) {
match = true;
break;
}
}
if (!match) {
return false;
}
}
return true;
}
}