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1
18
19 package org.apache.strutsel.taglib.utils;
20
21 import java.util.Iterator  ;
22 import java.util.Map ;
23
24 import javax.xml.transform.TransformerException ;
25
26 import org.apache.commons.logging.Log;
27 import org.apache.commons.logging.LogFactory;
28 import org.apache.xpath.CachedXPathAPI;
29 import org.w3c.dom.Attr ;
30 import org.w3c.dom.NamedNodeMap ;
31 import org.w3c.dom.Node ;
32 import org.w3c.dom.NodeList ;
33 import org.w3c.dom.Text ;
34
35
36 public class DOMHelper {
37
38 protected static final String spaces = " ";
39
40 private static Log log = LogFactory.getLog(DOMHelper.class);
41
42 public static String getNodeText(org.w3c.dom.Document document,
43 String xpath)
44 throws TransformerException {
45
46 String result = null;
47
48 if (!xpath.endsWith("text()")) {
49
50 if (!xpath.endsWith("/"))
51 xpath += "/";
52
53 xpath += "text()";
54 }
55
56 CachedXPathAPI xpathAPI = new CachedXPathAPI();
57 Node foundNode = xpathAPI.selectSingleNode(document, xpath);
58
59 if (foundNode == null)
60 result = "";
61 else if (foundNode.getNodeType() == Node.TEXT_NODE)
62 result = ((Text )foundNode).getData();
63
64 return (result);
65 }
66
67 public static void recordFoundAttributes(org.w3c.dom.Document document,
68 String xpath, Map map)
69 throws TransformerException {
70
71 CachedXPathAPI xpathAPI = new CachedXPathAPI();
72 Node foundNode = xpathAPI.selectSingleNode(document.getDocumentElement(),
73 xpath);
74
75 if (foundNode != null) {
76
77 NamedNodeMap attrMap = foundNode.getAttributes();
78
79 for (int ctr = 0; ctr < attrMap.getLength(); ++ctr) {
80
81 Attr attrNode = (Attr )attrMap.item(ctr);
82 map.put(attrNode.getName(), attrNode.getValue());
83 }
84 }
85 }
86
87 public static boolean verifyAttributesPresent(Map attrMap,
88 String [] attrNames,
89 boolean allowOthers)
90 throws Exception {
91
92 boolean result = true;
93
94 if (attrNames != null) {
95
96 for (int ctr = 0; ctr < attrNames.length; ++ctr) {
98
99 if (attrMap.get(attrNames[ctr]) == null) {
100 result = false;
101 throw new Exception ("Expected attribute \"" +
102 attrNames[ctr] +
103 "\" was not found in the generated tag.");
104 }
105 }
106
107 if (!allowOthers) {
110
111 for (Iterator iter = attrMap.keySet().iterator();
112 iter.hasNext();) {
113
114 String key = (String )iter.next();
115 boolean found = false;
116
117 for (int ctr = 0; ctr < attrNames.length; ++ctr) {
118
119 if (key.equals(attrNames[ctr])) {
120 found = true;
121
122 break;
123 }
124 }
125
126 if (!found) {
127 throw new Exception ("Attribute \"" + key +
128 "\" was not " +
129 "an expected attribute in the " +
130 "generated tag.");
131 }
132 }
133 }
134 }
135
136 return (result);
137 }
138
139 public static boolean verifyAttributesNotPresent(Map attrMap,
140 String [] attrNames)
141 throws Exception {
142
143 boolean result = true;
144
145 if (attrNames != null) {
146
147 for (int ctr = 0; ctr < attrNames.length; ++ctr) {
148
149 if (attrMap.get(attrNames[ctr]) != null) {
150 result = false;
151
152 break;
153 }
154 }
155 }
156
157 return (result);
158 }
159
160 public static void printNode(Node node) {
161 if (log.isDebugEnabled()) {
162 System.out.println("Node tree:");
163 printNode(node, 0);
164 }
165 }
166
167 public static void printNode(Node node, int level) {
168
169 if (node == null)
170 return;
171
172 String nodeName = node.getNodeName();
173 NodeList children = node.getChildNodes();
174
175 if (children != null) {
176
177 short nodeType = node.getNodeType();
178
179 if (nodeType == Node.TEXT_NODE) {
180
181 String text = ((Text )node).getData();
182 System.out.print(text);
183 } else {
184 System.out.print(spaces.substring(0, level) + "<" + nodeName);
185
186 NamedNodeMap nodeMap = node.getAttributes();
187 if (nodeMap.getLength() > 0) {
188 StringBuffer sb = new StringBuffer ();
189
190 for (int ctr = 0; ctr < nodeMap.getLength(); ++ ctr) {
191 Attr attrnode = (Attr ) nodeMap.item(ctr);
192 String name = attrnode.getName();
193 String value = attrnode.getValue();
194
195 sb.append(" " + name + "=\"" + value + "\"");
196 }
197
198 System.out.print(sb.toString());
199 }
200
201 System.out.println(">");
202 }
203
204 for (int ctr = 0; ctr < children.getLength(); ++ctr) {
205
206 Node child = children.item(ctr);
207 printNode(child, level + 1);
208 }
209
210 if (nodeType != Node.TEXT_NODE)
211 System.out.println(
212 spaces.substring(0, level) + "</" + nodeName + ">");
213 } else
214 System.out.println(
215 spaces.substring(0, level) + "<" + nodeName + "/>");
216 }
217 }
218 |
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