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46 package org.mr.core.configuration;
47
48 import java.io.File  ;
49 import java.util.ArrayList ;
50 import java.util.HashMap ;
51
52 import javax.xml.parsers.DocumentBuilder ;
53 import javax.xml.parsers.DocumentBuilderFactory ;
54
55 import org.mr.core.log.StartupLogger;
56 import org.w3c.dom.Document ;
57 import org.w3c.dom.Element ;
58 import org.w3c.dom.Node ;
59 import org.w3c.dom.NodeList ;
60
61
66 public class ConfigurationElement {
67 private String name;
68 private ArrayList subConfigurationElements = null;
70 private HashMap subConfigurationElementsMap = null;
71 private String value = null;
73
74 private boolean isLeaf;
75
76 private Element myRoot;
77
78
79 public ConfigurationElement(Element element) {
80 name =element.getNodeName();
81 myRoot = element;
82 NodeList sub = element.getChildNodes();
83 if(sub.getLength()==1 && sub.item(0).getNodeType() == Node.TEXT_NODE){
84 value = sub.item(0).getNodeValue();
86 value = value.trim();
87 isLeaf = true;
88 }else{
89 isLeaf = false;
90 subConfigurationElements = new ArrayList ();
91 subConfigurationElementsMap = new HashMap ();
92 for (int i = 0; i < sub.getLength(); i++) {
93 if(sub.item(i).getNodeType() == Node.ELEMENT_NODE){
94 Element subE = (Element )sub.item(i);
95 ConfigurationElement subElement =getRefOrRealConfigurationElement(subE); subConfigurationElements.add(subElement);
97 String subName = subElement.getName();
98 ArrayList toBeAdded = (ArrayList ) subConfigurationElementsMap.get(subName);
99
100 if(toBeAdded == null){
101 toBeAdded = new ArrayList ();
102 subConfigurationElementsMap.put(subName,toBeAdded);
103 }
104 toBeAdded.add(subElement);
105
106 }
107 }
109 } }
112 public Element getMyElement() {
113 return myRoot;
114 }
115
116 public ArrayList getSubConfigurationElements(String key) {
117 ConfigurationElement element = this;
118 ArrayList result = null;
119 String [] subKeys = key.split("\\.");
120 for (int i = 0; i < subKeys.length; i++) {
121 String subKey = subKeys[i];
122 if(element != null)
123 result = element.getSubConfigurationElementsByName(subKey);
124 if(result == null){
125 return null;
126 }else{
127 element = (ConfigurationElement) result.get(0);
128 }
129 }
130 return result;
131 }
132
133 public ConfigurationElement getSubConfigurationElement(String key) {
134 ConfigurationElement element = this;
135 ArrayList result = null;
136 String [] subKeys = key.split("\\.");
137 for (int i = 0; i < subKeys.length; i++) {
138 String subKey = subKeys[i];
139 result = element.getSubConfigurationElementsByName(subKey);
140 if(result == null){
141 return null;
142 }else{
143 element = (ConfigurationElement) result.get(0);
144 }
145 }
146 return (ConfigurationElement) result.get(0);
147 }
148
149 private ConfigurationElement getRefOrRealConfigurationElement(Element subE) {
150 ConfigurationElement result = null;
151 if(subE.getNodeName().equals("file_ref")){
152 String fileRef = subE.getChildNodes().item(0).getNodeValue();
153 File f = new File (fileRef);
154 if(!f.exists()){
155 StartupLogger.log.fatal("Did not find configuration file reference -"+fileRef, "ConfigurationElement");
157 throw new IllegalArgumentException ("Did not find configuration file reference -"+fileRef);
158 }
159 Element rootElement;
160 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
161 factory.setIgnoringElementContentWhitespace(true);
162
163 try{
164 DocumentBuilder xmlBuilder= factory.newDocumentBuilder();
165 Document xmlDoc = xmlBuilder.parse(f);
166
167 rootElement = xmlDoc.getDocumentElement();
168 result = new ConfigurationElement(rootElement);
169 }catch(Exception e){
170 e.printStackTrace();
171 throw new IllegalArgumentException (e.getLocalizedMessage());
172 }
173 }else{
174 result = new ConfigurationElement(subE);
175 }
176 return result;
177 }
178
179 public boolean isLeaf() {
180 return isLeaf;
181 }
182
183 public ArrayList getSubConfigurationElements() {
184 return subConfigurationElements;
185 }
186
187 public ArrayList getSubConfigurationElementsByName(String subName) {
188 ArrayList result = null;
189 if(subConfigurationElementsMap!=null)
190 result =(ArrayList ) subConfigurationElementsMap.get(subName);
191 return result;
192 }
193 public ConfigurationElement getSubConfigurationElementByName(String subName) {
194 ConfigurationElement result = null;
195 ArrayList sub = (ArrayList ) subConfigurationElementsMap.get(subName);
196 if(sub!=null){
197 result = (ConfigurationElement) sub.get(0);
198 }
199 return result;
200 }
201
202 public String getValue() {
203 return value;
204 }
205 public String getName() {
206 return name;
207 }
208 }
209 |
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