001    /**
002     * Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
003     *
004     * This library is free software; you can redistribute it and/or modify it under
005     * the terms of the GNU Lesser General Public License as published by the Free
006     * Software Foundation; either version 2.1 of the License, or (at your option)
007     * any later version.
008     *
009     * This library is distributed in the hope that it will be useful, but WITHOUT
010     * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
011     * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
012     * details.
013     */
014    
015    package com.liferay.util.xml.descriptor;
016    
017    import com.liferay.util.xml.AttributeComparator;
018    import com.liferay.util.xml.ElementComparator;
019    
020    import java.util.Comparator;
021    import java.util.List;
022    
023    import org.dom4j.Attribute;
024    import org.dom4j.Document;
025    import org.dom4j.Element;
026    
027    /**
028     * @author Jorge Ferrer
029     */
030    public class StrictXMLDescriptor implements XMLDescriptor {
031    
032            @Override
033            public boolean areEqual(Element el1, Element el2) {
034                    if (_compare(el1, el2) == 0) {
035                            return true;
036                    }
037                    else {
038                            return false;
039                    }
040            }
041    
042            @Override
043            public boolean canHandleType(String doctype, Document root) {
044                    return false;
045            }
046    
047            @Override
048            public boolean canJoinChildren(Element element) {
049                    return false;
050            }
051    
052            @Override
053            public String[] getChildrenOrder(Element parentElement) {
054                    return new String[0];
055            }
056    
057            @Override
058            public String[] getRootChildrenOrder() {
059                    return _ROOT_ORDERED_CHILDREN;
060            }
061    
062            private int _compare(Object obj1, Object obj2) {
063                    Element el1 = (Element)obj1;
064                    Element el2 = (Element)obj2;
065    
066                    String el1Name = el1.getName();
067                    String el2Name = el2.getName();
068    
069                    if (!el1Name.equals(el2Name)) {
070                            return el1Name.compareTo(el2Name);
071                    }
072    
073                    String el1Text = el1.getTextTrim();
074                    String el2Text = el2.getTextTrim();
075    
076                    if (!el1Text.equals(el2Text)) {
077                            return el1Text.compareTo(el2Text);
078                    }
079    
080                    int attributeComparison = _compareAttributes(el1, el2);
081    
082                    if (attributeComparison != 0) {
083                            return attributeComparison;
084                    }
085    
086                    int childrenComparison = _compareChildren(el1, el2);
087    
088                    if (childrenComparison != 0) {
089                            return childrenComparison;
090                    }
091    
092                    return 0;
093            }
094    
095            private int _compareAttributes(Element el1, Element el2) {
096                    List<Attribute> el1Attrs = el1.attributes();
097                    List<Attribute> el2Attrs = el2.attributes();
098    
099                    if (el1Attrs.size() < el2Attrs.size()) {
100                            return -1;
101                    }
102                    else if (el1Attrs.size() > el2Attrs.size()) {
103                            return 1;
104                    }
105    
106                    for (Attribute attr : el1Attrs) {
107                            int value = _contains(el2Attrs, attr, new AttributeComparator());
108    
109                            if (value != 0) {
110                                    return value;
111                            }
112                    }
113    
114                    return -1;
115            }
116    
117            private int _compareChildren(Element el1, Element el2) {
118                    List<Element> el1Children = el1.elements();
119                    List<Element> el2Children = el2.elements();
120    
121                    if (el1Children.size() < el2Children.size()) {
122                            return -1;
123                    }
124                    else if (el1Children.size() > el2Children.size()) {
125                            return 1;
126                    }
127    
128                    for (Element el : el1Children) {
129                            int value = _contains(el2Children, el, new ElementComparator());
130    
131                            if (value != 0) {
132                                    return value;
133                            }
134                    }
135    
136                    return -1;
137            }
138    
139            private int _contains(
140                    List<Attribute> list, Attribute obj, Comparator<Attribute> comparator) {
141    
142                    int firstValue = -1;
143    
144                    for (int i = 0; i < list.size(); i++) {
145                            Attribute o = list.get(i);
146    
147                            int value = comparator.compare(obj, o);
148    
149                            if (i == 0) {
150                                    firstValue = value;
151                            }
152    
153                            if (value == 0) {
154                                    return 0;
155                            }
156                    }
157    
158                    return firstValue;
159            }
160    
161            private int _contains(
162                    List<Element> list, Element obj, Comparator<Element> comparator) {
163    
164                    int firstValue = -1;
165    
166                    for (int i = 0; i < list.size(); i++) {
167                            Element o = list.get(i);
168    
169                            int value = comparator.compare(obj, o);
170    
171                            if (i == 0) {
172                                    firstValue = value;
173                            }
174    
175                            if (value == 0) {
176                                    return 0;
177                            }
178                    }
179    
180                    return firstValue;
181            }
182    
183            private static final String[] _ROOT_ORDERED_CHILDREN = {
184            };
185    
186    }