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1
36
37 package jnlp.sample.servlet;
38
39 import javax.xml.parsers.*;
40 import java.util.ArrayList  ;
41 import java.util.List ;
42 import org.xml.sax.*;
43 import org.w3c.dom.*;
44
45
48 public class XMLParsing {
49
50 public static XMLNode convert(Node n) {
51 if (n == null) {
52 return null;
53 } else if (n instanceof Text) {
54 Text tn = (Text)n;
55 return new XMLNode(tn.getNodeValue());
56 } else if (n instanceof Element) {
57 Element en = (Element)n;
58
59 XMLAttribute xmlatts = null;
60 NamedNodeMap attributes = en.getAttributes();
61 for(int i = attributes.getLength() - 1; i >= 0; i--) {
62 Attr ar = (Attr)attributes.item(i);
63 xmlatts = new XMLAttribute(ar.getName(), ar.getValue(), xmlatts);
64 }
65
66 XMLNode thisNode = new XMLNode(en.getNodeName(), xmlatts, null, null);;
68 XMLNode last = null;
69 Node nn = en.getFirstChild();
70 while(nn != null) {
71 if (thisNode.getNested() == null) {
72 last = convert(nn);
73 thisNode.setNested(last);
74 } else {
75 XMLNode nnode = convert(nn);
76 last.setNext(nnode);
77 last = nnode;
78 }
79 last.setParent(thisNode);
80 nn = nn.getNextSibling();
81 }
82
83 return thisNode;
84 }
85 return null;
86 }
87
88
89 static public boolean isElementPath(XMLNode root, String path) {
90 return findElementPath(root, path) != null;
91 }
92
93
94
95 static public String getPathString(XMLNode e) {
96 return (e == null || !(e.isElement())) ? "" : getPathString(e.getParent()) + "<" + e.getName() + ">";
97 }
98
99
100
101 static public String getElementContent(XMLNode root, String path) {
102 return getElementContent(root, path, null);
103 }
104
105
106 static public String [] getMultiElementContent(XMLNode root, String path) {
107 final List list = new ArrayList ();
108 visitElements(root, path, new ElementVisitor() {
109 public void visitElement(XMLNode n) {
110 String value = getElementContent(n, "");
111 if (value != null) list.add(value);
112 }
113 });
114 if (list.size() == 0) return null;
115 return (String [])list.toArray(new String [list.size()]);
116 }
117
118
121 static public String getElementContent(XMLNode root, String path, String defaultvalue) {
122 XMLNode e = findElementPath(root, path);
123 if (e == null) return defaultvalue;
124 XMLNode n = e.getNested();
125 if (n != null && !n.isElement()) return n.getName();
126 return defaultvalue;
127 }
128
129
133 static public XMLNode findElementPath(XMLNode elem, String path) {
134 if (elem == null) return null;
136 if (path == null || path.length() == 0) return elem;
138
139 int idx = path.indexOf('>');
141 String head = path.substring(1, idx);
142 String tail = path.substring(idx + 1);
143 return findElementPath(findChildElement(elem, head), tail);
144 }
145
146
147 static public XMLNode findChildElement(XMLNode elem, String tag) {
148 XMLNode n = elem.getNested();
149 while(n != null) {
150 if (n.isElement() && n.getName().equals(tag)) return n;
151 n = n.getNext();
152 }
153 return null;
154 }
155
156
157 public abstract static class ElementVisitor {
158 abstract public void visitElement(XMLNode e);
159 }
160
161
164 static public void visitElements(XMLNode root, String path, ElementVisitor ev) {
165 int idx = path.lastIndexOf('<');
167 String head = path.substring(0, idx);
168 String tag = path.substring(idx + 1, path.length() - 1);
169
170 XMLNode elem = findElementPath(root, head);
171 if (elem == null) return;
172
173 XMLNode n = elem.getNested();
175 while(n != null) {
176 if (n.isElement() && n.getName().equals(tag)) {
177 ev.visitElement(n);
178 }
179 n = n.getNext();
180 }
181 }
182
183 static public void visitChildrenElements(XMLNode elem, ElementVisitor ev) {
184 XMLNode n = elem.getNested();
186 while(n != null) {
187 if (n.isElement()) ev.visitElement(n);
188 n = n.getNext();
189 }
190 }
191 }
192
193 |
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