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16 package org.apache.cocoon.components.xscript;
17
18 import org.xml.sax.Attributes  ;
19 import org.xml.sax.SAXException ;
20 import org.xml.sax.helpers.DefaultHandler ;
21
22 import java.util.Stack ;
23
24
25
34 public class StringBufferContentHandler extends DefaultHandler {
35 private static Object marker = new Object ();
36
37 private Stack namespaces = new Stack ();
38 private StringBuffer stringBuffer;
39
40 public StringBufferContentHandler(StringBuffer stringBuffer) {
41 this.stringBuffer = stringBuffer;
42 }
43
44 public void startPrefixMapping(String prefix, String uri)
45 throws SAXException {
46 namespaces.push(new NPU(prefix, uri));
47 }
48
49 public void endPrefixMapping(String prefix)
50 throws SAXException {
51 namespaces.pop();
52 }
53
54 public void startElement(String uri, String loc, String qName, Attributes a)
55 throws SAXException {
56 int lastNamespaceIndex = 0;
57
58 lastNamespaceIndex = namespaces.size() - 1;
59 while (lastNamespaceIndex >= 0
60 && namespaces.elementAt(lastNamespaceIndex) != marker) {
61 lastNamespaceIndex--;
62 }
63
64 if (lastNamespaceIndex < 0) {
65 lastNamespaceIndex = 0;
66 } else if (namespaces.elementAt(lastNamespaceIndex) == marker) {
67 lastNamespaceIndex++;
68 }
69
70 namespaces.push(marker);
71 stringBuffer.append("<").append(qName);
72
73 for (int i = 0, len = a.getLength(); i < len; i++) {
74 String attrName = a.getQName(i);
79 if (attrName.startsWith("xmlns:")) {
80 String name = a.getLocalName(i);
82
83 boolean found = false;
85 for (int j = namespaces.size() - 1;
86 j >= lastNamespaceIndex;
87 j--) {
88 Object obj = namespaces.elementAt(j);
89 if (obj == marker) {
90 continue;
91 }
92 NPU npu = (NPU) obj;
93
94 if (name.equals(npu.prefix)) {
95 found = true;
96 break;
97 }
98 }
99
100 if (!found) {
101 namespaces.push(new NPU(name, a.getValue(i)));
102 }
103 } else {
104 stringBuffer.append(" ").append(a.getQName(i)).append("=\"");
106 escape(stringBuffer, a.getValue(i));
107 stringBuffer.append("\"");
108 }
109 }
110
111 if (namespaces.size() != 0) {
112 for (int i = namespaces.size() - 1; i >= lastNamespaceIndex; i--) {
113 Object obj = namespaces.elementAt(i);
114 if (obj == marker) {
115 continue;
116 }
117 NPU npu = (NPU) obj;
118 if ("".equals(npu.prefix)) {
119 stringBuffer.append(" xmlns").append("=\"").append(npu.uri).append("\"");
121 } else {
122 stringBuffer.append(" xmlns:").append(npu.prefix).append("=\"").append(npu.uri).append("\"");
123 }
124 }
125 }
126
127 stringBuffer.append(">");
128 }
129
130 public void endElement(String uri, String loc, String qName)
131 throws SAXException {
132 stringBuffer.append("</").append(qName).append(">");
133
134 Object obj;
135 do {
136 obj = namespaces.pop();
137 } while (obj != marker);
138 }
139
140 public void characters(char ch[], int start, int len)
141 throws SAXException {
142 escape(stringBuffer, ch, start, len);
143 }
144
145
146
151 private static void escape(StringBuffer buffer, String s) {
152 char[] ch = s.toCharArray();
153 escape(buffer, ch, 0, ch.length);
154 }
155
156
161 private static void escape(StringBuffer buffer, char ch[], int start, int len) {
162 for (int i = start; i < start + len; i++) {
163 switch (ch[i]) {
164 case '<':
165 buffer.append("<");
166 break;
167 case '&':
168 buffer.append("&");
169 break;
170 case '>':
171 buffer.append(">");
172 break;
173 default:
174 buffer.append(ch[i]);
175 break;
176 }
177 }
178 }
179 }
180
181 class NPU {
182 public String prefix;
183 public String uri;
184
185 NPU(String prefix, String uri) {
186 this.prefix = prefix;
187 this.uri = uri;
188 }
189
190 public String toString() {
191 return this.prefix + "=" + this.uri;
192 }
193 }
194 |
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