| 1 | /* |
| 2 | * Copyright (c) 2001-2009, Jean Tessier |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * |
| 9 | * * Redistributions of source code must retain the above copyright |
| 10 | * notice, this list of conditions and the following disclaimer. |
| 11 | * |
| 12 | * * Redistributions in binary form must reproduce the above copyright |
| 13 | * notice, this list of conditions and the following disclaimer in the |
| 14 | * documentation and/or other materials provided with the distribution. |
| 15 | * |
| 16 | * * Neither the name of Jean Tessier nor the names of his contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 21 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 22 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 23 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR |
| 24 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 25 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 26 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR |
| 27 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF |
| 28 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING |
| 29 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 30 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | package com.jeantessier.dependency; |
| 34 | |
| 35 | import java.util.*; |
| 36 | |
| 37 | import org.apache.log4j.*; |
| 38 | import org.xml.sax.*; |
| 39 | import org.xml.sax.helpers.*; |
| 40 | |
| 41 | public class NodeHandler extends DefaultHandler { |
| 42 | private static final int PACKAGE = 1; |
| 43 | private static final int CLASS = 2; |
| 44 | private static final int FEATURE = 3; |
| 45 | |
| 46 | private NodeFactory factory; |
| 47 | |
| 48 | private int currentNodeType; |
| 49 | private int currentDependencyType; |
| 50 | private Attributes currentDependencyAttributes; |
| 51 | private Node currentNode; |
| 52 | private Attributes currentPackageAttributes; |
| 53 | private Attributes currentClassAttributes; |
| 54 | private Attributes currentFeatureAttributes; |
| 55 | private StringBuffer currentName = new StringBuffer(); |
| 56 | |
| 57 | private HashSet<DependencyListener> dependencyListeners = new HashSet<DependencyListener>(); |
| 58 | |
| 59 | public NodeHandler() { |
| 60 | this(new NodeFactory()); |
| 61 | } |
| 62 | |
| 63 | public NodeHandler(NodeFactory factory) { |
| 64 | this.factory = factory; |
| 65 | } |
| 66 | |
| 67 | public NodeFactory getFactory() { |
| 68 | return factory; |
| 69 | } |
| 70 | |
| 71 | public void startElement(String namespaceURI, String localName, String qName, Attributes atts) throws SAXException { |
| 72 | Logger.getLogger(getClass()).debug("qName = " + qName); |
| 73 | |
| 74 | for (int i=0; i<atts.getLength(); i++) { |
| 75 | Logger.getLogger(getClass()).debug(" " + atts.getQName(i) + ": " + atts.getValue(i)); |
| 76 | } |
| 77 | |
| 78 | currentName.delete(0, currentName.length()); |
| 79 | |
| 80 | if ("dependencies".equals(qName)) { |
| 81 | fireBeginSession(); |
| 82 | } else if ("package".equals(qName)) { |
| 83 | currentNodeType = PACKAGE; |
| 84 | currentPackageAttributes = new AttributesImpl(atts); |
| 85 | } else if ("class".equals(qName)) { |
| 86 | currentNodeType = CLASS; |
| 87 | currentClassAttributes = new AttributesImpl(atts); |
| 88 | } else if ("feature".equals(qName)) { |
| 89 | currentNodeType = FEATURE; |
| 90 | currentFeatureAttributes = new AttributesImpl(atts); |
| 91 | } else if ("inbound".equals(qName) || "outbound".equals(qName)) { |
| 92 | if ("package".equals(atts.getValue("type"))) { |
| 93 | currentDependencyType = PACKAGE; |
| 94 | } else if ("class".equals(atts.getValue("type"))) { |
| 95 | currentDependencyType = CLASS; |
| 96 | } else if ("feature".equals(atts.getValue("type"))) { |
| 97 | currentDependencyType = FEATURE; |
| 98 | } |
| 99 | currentDependencyAttributes = new AttributesImpl(atts); |
| 100 | } |
| 101 | |
| 102 | Logger.getLogger(getClass()).debug(" current node type: " + currentNodeType); |
| 103 | Logger.getLogger(getClass()).debug(" current dependency type: " + currentDependencyType); |
| 104 | } |
| 105 | |
| 106 | public void endElement(String namespaceURI, String localName, String qName) throws SAXException { |
| 107 | Logger.getLogger(getClass()).debug("qName = " + qName); |
| 108 | |
| 109 | if ("dependencies".equals(qName)) { |
| 110 | fireEndSession(); |
| 111 | } else if ("name".equals(qName)) { |
| 112 | Logger.getLogger(getClass()).debug(" Processing <name> tag:"); |
| 113 | Logger.getLogger(getClass()).debug(" current name: " + currentName); |
| 114 | Logger.getLogger(getClass()).debug(" current node type: " + currentNodeType); |
| 115 | |
| 116 | switch (currentNodeType) { |
| 117 | case PACKAGE: |
| 118 | currentNode = getFactory().createPackage(currentName.toString(), isConfirmed(currentPackageAttributes)); |
| 119 | break; |
| 120 | case CLASS: |
| 121 | currentNode = getFactory().createClass(currentName.toString(), isConfirmed(currentClassAttributes)); |
| 122 | fireBeginClass(currentNode.getName()); |
| 123 | break; |
| 124 | case FEATURE: |
| 125 | currentNode = getFactory().createFeature(currentName.toString(), isConfirmed(currentFeatureAttributes)); |
| 126 | break; |
| 127 | } |
| 128 | } else if ("outbound".equals(qName)) { |
| 129 | Logger.getLogger(getClass()).debug(" Processing <outbound> tag:"); |
| 130 | Logger.getLogger(getClass()).debug(" current_name: " + currentName); |
| 131 | Logger.getLogger(getClass()).debug(" current_dependency_type: " + currentDependencyType); |
| 132 | |
| 133 | Node other = null; |
| 134 | switch (currentDependencyType) { |
| 135 | case PACKAGE: |
| 136 | other = getFactory().createPackage(currentName.toString(), isConfirmed(currentDependencyAttributes)); |
| 137 | break; |
| 138 | case CLASS: |
| 139 | other = getFactory().createClass(currentName.toString(), isConfirmed(currentDependencyAttributes)); |
| 140 | break; |
| 141 | case FEATURE: |
| 142 | other = getFactory().createFeature(currentName.toString(), isConfirmed(currentDependencyAttributes)); |
| 143 | break; |
| 144 | } |
| 145 | currentNode.addDependency(other); |
| 146 | fireDependency(currentNode, other); |
| 147 | } else if ("inbound".equals(qName)) { |
| 148 | Logger.getLogger(getClass()).debug(" Processing <inbound> tag:"); |
| 149 | Logger.getLogger(getClass()).debug(" current_name: " + currentName); |
| 150 | Logger.getLogger(getClass()).debug(" current_dependency_type: " + currentDependencyType); |
| 151 | |
| 152 | Node other = null; |
| 153 | switch (currentDependencyType) { |
| 154 | case PACKAGE: |
| 155 | other = getFactory().createPackage(currentName.toString(), isConfirmed(currentDependencyAttributes)); |
| 156 | break; |
| 157 | case CLASS: |
| 158 | other = getFactory().createClass(currentName.toString(), isConfirmed(currentDependencyAttributes)); |
| 159 | break; |
| 160 | case FEATURE: |
| 161 | other = getFactory().createFeature(currentName.toString(), isConfirmed(currentDependencyAttributes)); |
| 162 | break; |
| 163 | } |
| 164 | other.addDependency(currentNode); |
| 165 | fireDependency(other, currentNode); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | public void characters(char[] ch, int start, int length) throws SAXException { |
| 170 | currentName.append(ch, start, length); |
| 171 | Logger.getLogger(getClass()).debug("characters: \"" + new String(ch, start, length) + "\""); |
| 172 | } |
| 173 | |
| 174 | public void addDependencyListener(DependencyListener listener) { |
| 175 | synchronized(dependencyListeners) { |
| 176 | dependencyListeners.add(listener); |
| 177 | } |
| 178 | } |
| 179 | |
| 180 | public void removeDependencyListener(DependencyListener listener) { |
| 181 | synchronized(dependencyListeners) { |
| 182 | dependencyListeners.remove(listener); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | protected void fireBeginSession() { |
| 187 | DependencyEvent event = new DependencyEvent(this); |
| 188 | |
| 189 | HashSet<DependencyListener> listeners; |
| 190 | synchronized(dependencyListeners) { |
| 191 | listeners = (HashSet<DependencyListener>) dependencyListeners.clone(); |
| 192 | } |
| 193 | |
| 194 | for (DependencyListener listener : listeners) { |
| 195 | listener.beginSession(event); |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | protected void fireBeginClass(String classname) { |
| 200 | DependencyEvent event = new DependencyEvent(this, classname); |
| 201 | |
| 202 | HashSet<DependencyListener> listeners; |
| 203 | synchronized(dependencyListeners) { |
| 204 | listeners = (HashSet<DependencyListener>) dependencyListeners.clone(); |
| 205 | } |
| 206 | |
| 207 | for (DependencyListener listener : listeners) { |
| 208 | listener.beginClass(event); |
| 209 | } |
| 210 | } |
| 211 | |
| 212 | protected void fireDependency(Node dependent, Node dependable) { |
| 213 | DependencyEvent event = new DependencyEvent(this, dependent, dependable); |
| 214 | |
| 215 | HashSet<DependencyListener> listeners; |
| 216 | synchronized(dependencyListeners) { |
| 217 | listeners = (HashSet<DependencyListener>) dependencyListeners.clone(); |
| 218 | } |
| 219 | |
| 220 | for (DependencyListener listener : listeners) { |
| 221 | listener.dependency(event); |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | protected void fireEndClass(String classname) { |
| 226 | DependencyEvent event = new DependencyEvent(this, classname); |
| 227 | |
| 228 | HashSet<DependencyListener> listeners; |
| 229 | synchronized(dependencyListeners) { |
| 230 | listeners = (HashSet<DependencyListener>) dependencyListeners.clone(); |
| 231 | } |
| 232 | |
| 233 | for (DependencyListener listener : listeners) { |
| 234 | listener.endClass(event); |
| 235 | } |
| 236 | } |
| 237 | |
| 238 | protected void fireEndSession() { |
| 239 | DependencyEvent event = new DependencyEvent(this); |
| 240 | |
| 241 | HashSet<DependencyListener> listeners; |
| 242 | synchronized(dependencyListeners) { |
| 243 | listeners = (HashSet<DependencyListener>) dependencyListeners.clone(); |
| 244 | } |
| 245 | |
| 246 | for (DependencyListener listener : listeners) { |
| 247 | listener.endSession(event); |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | private boolean isConfirmed(Attributes atts) { |
| 252 | return atts.getValue("confirmed") == null || "yes".equalsIgnoreCase(atts.getValue("confirmed")); |
| 253 | } |
| 254 | } |