| /* |
| * 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.vysper.xml.fragment; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| import java.util.TreeSet; |
| |
| /** |
| * |
| * @author The Apache MINA Project (dev@mina.apache.org) |
| */ |
| public class EqualityVerifier { |
| |
| private static AttributeComparator ATTRIBUTE_COMPARATOR = new AttributeComparator(); |
| |
| /** |
| * checks only name, namespace and attributes of both XMLElements for equality, |
| * but not inner elements |
| */ |
| public boolean equalsElements_Shallow(XMLElement first, XMLElement second) { |
| if (first == null) |
| return second == null; |
| if (second == null) |
| return false; |
| |
| if (!first.getName().equals(second.getName())) |
| return false; |
| if (!first.getNamespacePrefix().equals(second.getNamespacePrefix())) |
| return false; |
| |
| return equalsAttributes(first.getAttributes(), second.getAttributes()); |
| } |
| |
| /** |
| * additional to the shallow check, does check the inner elements. more precisely, it checks whether |
| * all inner elements at corresponding positions are equal. it does _not_ check whether inner elements |
| * are the same for some proper mutation. |
| */ |
| public boolean equalsElements_DeepSameOrder(XMLElement first, XMLElement second) { |
| if (first == null) |
| return second == null; |
| if (second == null) |
| return false; |
| |
| if (!first.getName().equals(second.getName())) |
| return false; |
| if (!first.getNamespacePrefix().equals(second.getNamespacePrefix())) |
| return false; |
| |
| boolean attrEquals = equalsAttributes(first.getAttributes(), second.getAttributes()); |
| if (!attrEquals) |
| return false; |
| |
| List<XMLElement> firstInnerElements = first.getInnerElements(); |
| List<XMLElement> secondInnerElements = second.getInnerElements(); |
| |
| if (firstInnerElements.size() != secondInnerElements.size()) |
| return false; |
| for (int i = 0; i < firstInnerElements.size(); i++) { |
| if (!equalsElements_DeepSameOrder(firstInnerElements.get(0), secondInnerElements.get(0))) |
| return false; |
| } |
| return true; |
| } |
| |
| private boolean equalsAttributes(List<Attribute> firstAttrs, List<Attribute> secondAttrs) { |
| TreeSet<Attribute> attrSorted1 = new TreeSet<Attribute>(ATTRIBUTE_COMPARATOR); |
| attrSorted1.addAll(firstAttrs); |
| |
| TreeSet<Attribute> attrSorted2 = new TreeSet<Attribute>(ATTRIBUTE_COMPARATOR); |
| attrSorted2.addAll(secondAttrs); |
| |
| return attrSorted1.equals(attrSorted2); |
| } |
| |
| static class AttributeComparator implements Comparator<Attribute> { |
| |
| public int compare(Attribute attribute1, Attribute attribute2) { |
| if (attribute1.getName().equals(attribute2.getName())) { |
| return attribute1.getValue().compareTo(attribute2.getValue()); |
| } |
| return attribute1.getName().compareTo(attribute2.getName()); |
| } |
| } |
| } |