1 /**
2 * Redistribution and use of this software and associated documentation ("Software"), with or
3 * without modification, are permitted provided that the following conditions are met:
4 *
5 * 1. Redistributions of source code must retain copyright statements and notices. Redistributions
6 * must also contain a copy of this document.
7 *
8 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
9 * conditions and the following disclaimer in the documentation and/or other materials provided with
10 * the distribution.
11 *
12 * 3. The name "Exolab" must not be used to endorse or promote products derived from this Software
13 * without prior written permission of Intalio, Inc. For written permission, please contact
14 * info@exolab.org.
15 *
16 * 4. Products derived from this Software may not be called "Exolab" nor may "Exolab" appear in
17 * their names without prior written permission of Intalio, Inc. Exolab is a registered trademark of
18 * Intalio, Inc.
19 *
20 * 5. Due credit should be given to the Exolab Project (http://www.exolab.org/).
21 *
22 * THIS SOFTWARE IS PROVIDED BY INTALIO, INC. AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESSED OR
23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
24 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTALIO, INC. OR ITS
25 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
28 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY
29 * WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * Copyright 1999 (C) Intalio, Inc. All Rights Reserved.
32 *
33 * $Id$
34 */
35
36
37 package org.exolab.castor.dsml;
38
39
40 import java.util.Enumeration;
41 import org.xml.sax.DocumentHandler;
42 import org.xml.sax.SAXException;
43 import org.xml.sax.AttributeList;
44 import org.xml.sax.Locator;
45 import org.castor.core.util.Messages;
46
47
48 /**
49 *
50 *
51 * @author <a href="mailto:arkin@intalio.com">Assaf Arkin</a>
52 * @version $Revision$ $Date: 2006-04-26 13:58:52 -0600 (Wed, 26 Apr 2006) $
53 */
54 public abstract class Consumer implements DocumentHandler {
55
56
57 private boolean _insideRoot;
58
59
60 private DocumentHandler _redirect;
61
62
63 public Consumer() {}
64
65
66 public abstract Enumeration getResults();
67
68
69 protected abstract DocumentHandler getEntryConsumer();
70
71
72 public void startElement(String tagName, AttributeList attr) throws SAXException {
73 if (_redirect != null) {
74 // When redirecting all element creations pass directly to
75 // the other handler, we only look for closure.
76 _redirect.startElement(tagName, attr);
77 } else if (tagName.equals(XML.Namespace.ROOT)) {
78 // Flag when entering (and leaving) the root element.
79 if (_insideRoot)
80 throw new SAXException(Messages.format("dsml.elementNested", XML.Namespace.ROOT));
81 _insideRoot = true;
82 } else {
83 if (!_insideRoot)
84 throw new SAXException(
85 Messages.format("dsml.expectingOpeningTag", XML.Namespace.ROOT, tagName));
86 if (tagName.equals(XML.Schema.ELEMENT) || tagName.equals(XML.Entries.ELEMENT)) {
87 DocumentHandler entry;
88
89 entry = getEntryConsumer();
90 entry.startElement(tagName, attr);
91 _redirect = entry;
92 } else {
93 throw new SAXException(Messages.format("dsml.openingTagNotRecognized", tagName));
94 }
95 }
96 }
97
98
99 public void endElement(String tagName) throws SAXException {
100 if (_redirect == null) {
101 // This is the only case where we expect the root element
102 // to be closed.
103 if (tagName.equals(XML.Namespace.ROOT)) {
104 if (_insideRoot == true)
105 _insideRoot = false;
106 else
107 throw new SAXException(Messages.format("dsml.closingOutsideRoot", tagName));
108 } else {
109 throw new SAXException(
110 Messages.format("dsml.expectingClosingTag", XML.Namespace.ROOT, tagName));
111 }
112 } else {
113 _redirect.endElement(tagName);
114
115 if (tagName.equals(XML.Schema.ELEMENT) || tagName.equals(XML.Entries.ELEMENT)) {
116 // If we've reached this point we must be inside the
117 // entries/schema redirect.
118 _redirect = null;
119 }
120 // If we've reached this point we must be inside the
121 // entries/schema redirect, we ignore all closing tags.
122 }
123 }
124
125
126 public void characters(char[] ch, int offset, int length) throws SAXException {
127 if (_redirect != null) {
128 _redirect.characters(ch, offset, length);
129 }
130 }
131
132
133 public void ignorableWhitespace(char[] ch, int offset, int length) throws SAXException {
134 if (_redirect != null) {
135 _redirect.ignorableWhitespace(ch, offset, length);
136 }
137 }
138
139
140 public void processingInstruction(String target, String instruction) throws SAXException {
141 if (_redirect != null) {
142 _redirect.processingInstruction(target, instruction);
143 }
144 }
145
146
147 public void startDocument() throws SAXException {}
148
149
150 public void endDocument() throws SAXException {
151 if (_insideRoot)
152 throw new SAXException(Messages.message("dsml.documentRootStillOpen"));
153 }
154
155
156 public void setDocumentLocator(Locator locator) {}
157
158
159 }
160