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1
11 package org.eclipse.pde.internal.core.plugin;
12
13 import java.io.StringReader  ;
14 import java.util.Stack ;
15
16 import javax.xml.parsers.DocumentBuilderFactory ;
17 import javax.xml.parsers.ParserConfigurationException ;
18
19 import org.eclipse.pde.internal.core.util.IdUtil;
20 import org.w3c.dom.DOMException ;
21 import org.w3c.dom.Document ;
22 import org.w3c.dom.Element ;
23 import org.w3c.dom.Node ;
24 import org.w3c.dom.Text ;
25 import org.xml.sax.Attributes ;
26 import org.xml.sax.InputSource ;
27 import org.xml.sax.Locator ;
28 import org.xml.sax.SAXException ;
29 import org.xml.sax.helpers.DefaultHandler ;
30
31 public class PluginHandler extends DefaultHandler {
32 private Document fDocument;
33 private Element fRootElement;
34 private Stack fOpenElements = new Stack ();
35
36 private String fSchemaVersion;
37 private boolean fAbbreviated;
38 private Locator fLocator;
39 private boolean fPop;
40
41 public PluginHandler(boolean abbreviated) {
42 fAbbreviated = abbreviated;
43 }
44
45 public void startElement(String uri, String localName, String qName, Attributes attributes)
46 throws SAXException {
47
48 fPop = true;
49
50 if (fAbbreviated && fOpenElements.size() == 2) {
51 Element parent = (Element )fOpenElements.peek();
52 if (parent.getNodeName().equals("extension") && !isInterestingExtension((Element )fOpenElements.peek())) { fPop = false;
54 return;
55 }
56 }
57
58 Element element = fDocument.createElement(qName);
59 for (int i = 0; i < attributes.getLength(); i++) {
60 element.setAttribute(attributes.getQName(i), attributes.getValue(i));
61 if ("extension".equals(qName) || "extension-point".equals(qName)) { element.setAttribute("line", Integer.toString(fLocator.getLineNumber())); }
64 }
65
66 if (fRootElement == null)
67 fRootElement = element;
68 else
69 ((Element )fOpenElements.peek()).appendChild(element);
70
71 fOpenElements.push(element);
72 }
73
74 protected boolean isInterestingExtension(Element element) {
75 String point = element.getAttribute("point"); return IdUtil.isInterestingExtensionPoint(point);
77 }
78
79 public void endElement(String uri, String localName, String qName) throws SAXException {
80 if (fPop || (qName.equals("extension") && fOpenElements.size() == 2)) { fOpenElements.pop();
82 }
83 }
84
85
88 public void setDocumentLocator(Locator locator) {
89 fLocator = locator;
90 }
91
92
95 public void startDocument() throws SAXException {
96 DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
97 try {
98 fDocument = factory.newDocumentBuilder().newDocument();
99 } catch (ParserConfigurationException e) {
100 }
101 }
102
103
106 public void endDocument() throws SAXException {
107 fDocument.appendChild(fRootElement);
108 }
109
110
113 public void processingInstruction(String target, String data) throws SAXException {
114 if ("eclipse".equals(target)) { fSchemaVersion = "version=\"3.0\"".equals(data) ? "3.0" : "3.2"; }
117 }
118
119
122 public void characters(char[] characters, int start, int length) throws SAXException {
123 if (fAbbreviated)
124 return;
125
126 processCharacters(characters, start, length);
127 }
128
129
135 protected void processCharacters(char[] characters, int start, int length)
136 throws DOMException {
137 StringBuffer buff = new StringBuffer ();
138 for (int i = 0; i < length; i++) {
139 buff.append(characters[start + i]);
140 }
141 Text text = fDocument.createTextNode(buff.toString());
142 if (fRootElement == null)
143 fDocument.appendChild(text);
144 else
145 ((Element )fOpenElements.peek()).appendChild(text);
146 }
147
148 public Node getDocumentElement() {
149 if (fRootElement != null) {
150 fRootElement.normalize();
151 }
152 return fRootElement;
153 }
154
155 public String getSchemaVersion() {
156 return fSchemaVersion;
157 }
158
159 public InputSource resolveEntity(String publicId, String systemId) throws SAXException {
160 return new InputSource (new StringReader ("")); }
165
166 }
167 |
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