Mercurial > jdk8-mips64-public > jaxws / file comparison

comparison: src/share/jaxws_classes/com/sun/tools/internal/xjc/reader/internalizer/DOMForestScanner.java

src/share/jaxws_classes/com/sun/tools/internal/xjc/reader/internalizer/DOMForestScanner.java

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1 /*
2 * Copyright (c) 1997, 2011, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. Oracle designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Oracle in the LICENSE file that accompanied this code.
10 *
11 * This code is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
14 * version 2 for more details (a copy is included in the LICENSE file that
15 * accompanied this code).
16 *
17 * You should have received a copy of the GNU General Public License version
18 * 2 along with this work; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20 *
21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22 * or visit www.oracle.com if you need additional information or have any
23 * questions.
24 */
25
26 package com.sun.tools.internal.xjc.reader.internalizer;
27
28 import com.sun.xml.internal.bind.unmarshaller.DOMScanner;
29
30 import org.w3c.dom.Document;
31 import org.w3c.dom.Element;
32 import org.w3c.dom.Node;
33 import org.xml.sax.Attributes;
34 import org.xml.sax.ContentHandler;
35 import org.xml.sax.Locator;
36 import org.xml.sax.SAXException;
37 import org.xml.sax.helpers.XMLFilterImpl;
38
39 /**
40 * Produces a complete series of SAX events from any DOM node
41 * in the DOMForest.
42 *
43 * <p>
44 * This class hides a logic of re-associating {@link Locator}
45 * to the generated SAX event stream.
46 *
47 * @author
48 * Kohsuke Kawaguchi (kohsuke.kawaguchi@sun.com)
49 */
50 public class DOMForestScanner {
51
52 private final DOMForest forest;
53
54 /**
55 * Scans DOM nodes of the given forest.
56 *
57 * DOM node parameters to the scan method must be a part of
58 * this forest.
59 */
60 public DOMForestScanner( DOMForest _forest ) {
61 this.forest = _forest;
62 }
63
64 /**
65 * Generates the whole set of SAX events by treating
66 * element e as if it's a root element.
67 */
68 public void scan( Element e, ContentHandler contentHandler ) throws SAXException {
69 DOMScanner scanner = new DOMScanner();
70
71 // insert the location resolver into the pipe line
72 LocationResolver resolver = new LocationResolver(scanner);
73 resolver.setContentHandler(contentHandler);
74
75 // parse this DOM.
76 scanner.setContentHandler(resolver);
77 scanner.scan(e);
78 }
79
80 /**
81 * Generates the whole set of SAX events from the given Document
82 * in the DOMForest.
83 */
84 public void scan( Document d, ContentHandler contentHandler ) throws SAXException {
85 scan( d.getDocumentElement(), contentHandler );
86 }
87
88 /**
89 * Intercepts the invocation of the setDocumentLocator method
90 * and passes itself as the locator.
91 *
92 * If the client calls one of the methods on the Locator interface,
93 * use the LocatorTable to resolve the source location.
94 */
95 private class LocationResolver extends XMLFilterImpl implements Locator {
96 LocationResolver( DOMScanner _parent ) {
97 this.parent = _parent;
98 }
99
100 private final DOMScanner parent;
101
102 /**
103 * Flag that tells us whether we are processing a start element event
104 * or an end element event.
105 *
106 * DOMScanner's getCurrentLocation method doesn't tell us which, but
107 * this information is necessary to return the correct source line information.
108 *
109 * Thus we set this flag appropriately before we pass an event to
110 * the next ContentHandler, thereby making it possible to figure
111 * out which location to return.
112 */
113 private boolean inStart = false;
114
115 @Override
116 public void setDocumentLocator(Locator locator) {
117 // ignore one set by the parent.
118
119 super.setDocumentLocator(this);
120 }
121
122 @Override
123 public void endElement(String namespaceURI, String localName, String qName) throws SAXException {
124 inStart = false;
125 super.endElement(namespaceURI, localName, qName);
126 }
127
128 @Override
129 public void startElement(String namespaceURI, String localName, String qName, Attributes atts)
130 throws SAXException {
131 inStart = true;
132 super.startElement(namespaceURI, localName, qName, atts);
133 }
134
135 private Locator findLocator() {
136 Node n = parent.getCurrentLocation();
137 if( n instanceof Element ) {
138 Element e = (Element)n;
139 if( inStart )
140 return forest.locatorTable.getStartLocation( e );
141 else
142 return forest.locatorTable.getEndLocation( e );
143 }
144 return null;
145 }
146
147 //
148 //
149 // Locator methods
150 //
151 //
152 public int getColumnNumber() {
153 Locator l = findLocator();
154 if(l!=null) return l.getColumnNumber();
155 return -1;
156 }
157
158 public int getLineNumber() {
159 Locator l = findLocator();
160 if(l!=null) return l.getLineNumber();
161 return -1;
162 }
163
164 public String getPublicId() {
165 Locator l = findLocator();
166 if(l!=null) return l.getPublicId();
167 return null;
168 }
169
170 public String getSystemId() {
171 Locator l = findLocator();
172 if(l!=null) return l.getSystemId();
173 return null;
174 }
175
176 }
177 }

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