Clover coverage report - dom4j - 1.6.1
Coverage timestamp: ma mei 16 2005 14:23:01 GMT+01:00

file stats: | LOC: | 255 |  | Methods: | 11
| NCLOC: | 84 |  | Classes: | 1

Source file | Conditionals | Statements | Methods | TOTAL

DispatchHandler.java

83,3%

64,1%

36,4%

62,9%

1 |  | /*
2 |  | * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
3 |  | *
4 |  | * This software is open source.
5 |  | * See the bottom of this file for the licence.
6 |  | */
7 |  |
8 |  | package org.dom4j.io;
9 |  |
10 |  | import java.util.ArrayList;
11 |  | import java.util.HashMap;
12 |  |
13 |  | import org.dom4j.Element;
14 |  | import org.dom4j.ElementHandler;
15 |  | import org.dom4j.ElementPath;
16 |  |
17 |  | /**
18 |  | * <p>
19 |  | * <code>DispatchHandler</code> implements the <code>ElementHandler</code>
20 |  | * interface and provides a means to register multiple
21 |  | * <code>ElementHandler</code> instances to be used by an event based
22 |  | * processor. This is a special <code>ElementHandler</code> in that it's
23 |  | * <b>onStart </b> and <b>onEnd </b> implementation methods are called for every
24 |  | * element encountered during the parse. It then delegates to other
25 |  | * <code>ElementHandler</code> instances registered with it to process the
26 |  | * elements encountered.
27 |  | * </p>
28 |  | *
29 |  | * @author <a href="mailto:dwhite@equipecom.com">Dave White </a>
30 |  | * @version $Revision: 1.11 $
31 |  | */
32 |  | class DispatchHandler implements ElementHandler {
33 |  | /** Whether the parser is at the root element or not */
34 |  | private boolean atRoot;
35 |  |
36 |  | /** The current path in the XML tree (i.e. /a/b/c) */
37 |  | private String path;
38 |  |
39 |  | /** maintains a stack of previously encountered paths */
40 |  | private ArrayList pathStack;
41 |  |
42 |  | /** maintains a stack of previously encountered handlers */
43 |  | private ArrayList handlerStack;
44 |  |
45 |  | /**
46 |  | * <code>HashMap</code> maintains the mapping between element paths and
47 |  | * handlers
48 |  | */
49 |  | private HashMap handlers;
50 |  |
51 |  | /**
52 |  | * <code>ElementHandler</code> to use by default for element paths with no
53 |  | * handlers registered
54 |  | */
55 |  | private ElementHandler defaultHandler;
56 |  |
57 | 21 | public DispatchHandler() {
58 | 21 | atRoot = true;
59 | 21 | path = "/";
60 | 21 | pathStack = new ArrayList();
61 | 21 | handlerStack = new ArrayList();
62 | 21 | handlers = new HashMap();
63 |  | }
64 |  |
65 |  | /**
66 |  | * Adds the <code>ElementHandler</code> to be called when the specified
67 |  | * path is encounted.
68 |  | *
69 |  | * @param handlerPath
70 |  | * is the path to be handled
71 |  | * @param handler
72 |  | * is the <code>ElementHandler</code> to be called by the event
73 |  | * based processor.
74 |  | */
75 | 21 | public void addHandler(String handlerPath, ElementHandler handler) {
76 | 21 | handlers.put(handlerPath, handler);
77 |  | }
78 |  |
79 |  | /**
80 |  | * Removes the <code>ElementHandler</code> from the event based processor,
81 |  | * for the specified path.
82 |  | *
83 |  | * @param handlerPath
84 |  | * is the path to remove the <code>ElementHandler</code> for.
85 |  | *
86 |  | * @return DOCUMENT ME!
87 |  | */
88 | 0 | public ElementHandler removeHandler(String handlerPath) {
89 | 0 | return (ElementHandler) handlers.remove(handlerPath);
90 |  | }
91 |  |
92 |  | /**
93 |  | * DOCUMENT ME!
94 |  | *
95 |  | * @param handlerPath
96 |  | * DOCUMENT ME!
97 |  | *
98 |  | * @return true when an <code>ElementHandler</code> is registered for the
99 |  | * specified path.
100 |  | */
101 | 0 | public boolean containsHandler(String handlerPath) {
102 | 0 | return handlers.containsKey(handlerPath);
103 |  | }
104 |  |
105 |  | /**
106 |  | * Get the registered {@link ElementHandler}for the specified path.
107 |  | *
108 |  | * @param handlerPath
109 |  | * XML path to get the handler for
110 |  | *
111 |  | * @return the registered handler
112 |  | */
113 | 0 | public ElementHandler getHandler(String handlerPath) {
114 | 0 | return (ElementHandler) handlers.get(handlerPath);
115 |  | }
116 |  |
117 |  | /**
118 |  | * Returns the number of {@link ElementHandler}objects that are waiting for
119 |  | * their elements closing tag.
120 |  | *
121 |  | * @return number of active handlers
122 |  | */
123 | 0 | public int getActiveHandlerCount() {
124 | 0 | return handlerStack.size();
125 |  | }
126 |  |
127 |  | /**
128 |  | * When multiple <code>ElementHandler</code> instances have been
129 |  | * registered, this will set a default <code>ElementHandler</code> to be
130 |  | * called for any path which does <b>NOT </b> have a handler registered.
131 |  | *
132 |  | * @param handler
133 |  | * is the <code>ElementHandler</code> to be called by the event
134 |  | * based processor.
135 |  | */
136 | 0 | public void setDefaultHandler(ElementHandler handler) {
137 | 0 | defaultHandler = handler;
138 |  | }
139 |  |
140 |  | /**
141 |  | * Used to remove all the Element Handlers and return things back to the way
142 |  | * they were when object was created.
143 |  | */
144 | 0 | public void resetHandlers() {
145 | 0 | atRoot = true;
146 | 0 | path = "/";
147 | 0 | pathStack.clear();
148 | 0 | handlerStack.clear();
149 | 0 | handlers.clear();
150 | 0 | defaultHandler = null;
151 |  | }
152 |  |
153 |  | /**
154 |  | * DOCUMENT ME!
155 |  | *
156 |  | * @return the current path for the parse
157 |  | */
158 | 0 | public String getPath() {
159 | 0 | return path;
160 |  | }
161 |  |
162 |  | // The following methods implement the ElementHandler interface
163 | 78 | public void onStart(ElementPath elementPath) {
164 | 78 | Element element = elementPath.getCurrent();
165 |  |
166 |  | // Save the location of the last (i.e. parent) path
167 | 78 | pathStack.add(path);
168 |  |
169 |  | // Calculate the new path
170 | 78 | if (atRoot) {
171 | 18 | path = path + element.getName();
172 | 18 | atRoot = false;
173 |  | } else {
174 | 60 | path = path + "/" + element.getName();
175 |  | }
176 |  |
177 | 78 | if ((handlers != null) && (handlers.containsKey(path))) {
178 |  | // The current node has a handler associated with it.
179 |  | // Find the handler and save it on the handler stack.
180 | 54 | ElementHandler handler = (ElementHandler) handlers.get(path);
181 | 54 | handlerStack.add(handler);
182 |  |
183 |  | // Call the handlers onStart method.
184 | 54 | handler.onStart(elementPath);
185 |  | } else {
186 |  | // No handler is associated with this node, so use the
187 |  | // defaultHandler it it exists.
188 | 24 | if (handlerStack.isEmpty() && (defaultHandler != null)) {
189 | 0 | defaultHandler.onStart(elementPath);
190 |  | }
191 |  | }
192 |  | }
193 |  |
194 | 78 | public void onEnd(ElementPath elementPath) {
195 | 78 | if ((handlers != null) && (handlers.containsKey(path))) {
196 |  | // This node has a handler associated with it.
197 |  | // Find the handler and pop it from the handler stack.
198 | 54 | ElementHandler handler = (ElementHandler) handlers.get(path);
199 | 54 | handlerStack.remove(handlerStack.size() - 1);
200 |  |
201 |  | // Call the handlers onEnd method
202 | 54 | handler.onEnd(elementPath);
203 |  | } else {
204 |  | // No handler is associated with this node, so use the
205 |  | // defaultHandler it it exists.
206 | 24 | if (handlerStack.isEmpty() && (defaultHandler != null)) {
207 | 0 | defaultHandler.onEnd(elementPath);
208 |  | }
209 |  | }
210 |  |
211 |  | // Set path back to its parent
212 | 78 | path = (String) pathStack.remove(pathStack.size() - 1);
213 |  |
214 | 78 | if (pathStack.size() == 0) {
215 | 18 | atRoot = true;
216 |  | }
217 |  | }
218 |  | }
219 |  |
220 |  | /*
221 |  | * Redistribution and use of this software and associated documentation
222 |  | * ("Software"), with or without modification, are permitted provided that the
223 |  | * following conditions are met:
224 |  | *
225 |  | * 1. Redistributions of source code must retain copyright statements and
226 |  | * notices. Redistributions must also contain a copy of this document.
227 |  | *
228 |  | * 2. Redistributions in binary form must reproduce the above copyright notice,
229 |  | * this list of conditions and the following disclaimer in the documentation
230 |  | * and/or other materials provided with the distribution.
231 |  | *
232 |  | * 3. The name "DOM4J" must not be used to endorse or promote products derived
233 |  | * from this Software without prior written permission of MetaStuff, Ltd. For
234 |  | * written permission, please contact dom4j-info@metastuff.com.
235 |  | *
236 |  | * 4. Products derived from this Software may not be called "DOM4J" nor may
237 |  | * "DOM4J" appear in their names without prior written permission of MetaStuff,
238 |  | * Ltd. DOM4J is a registered trademark of MetaStuff, Ltd.
239 |  | *
240 |  | * 5. Due credit should be given to the DOM4J Project - http://www.dom4j.org
241 |  | *
242 |  | * THIS SOFTWARE IS PROVIDED BY METASTUFF, LTD. AND CONTRIBUTORS ``AS IS'' AND
243 |  | * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
244 |  | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
245 |  | * ARE DISCLAIMED. IN NO EVENT SHALL METASTUFF, LTD. OR ITS CONTRIBUTORS BE
246 |  | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
247 |  | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
248 |  | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
249 |  | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
250 |  | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
251 |  | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
252 |  | * POSSIBILITY OF SUCH DAMAGE.
253 |  | *
254 |  | * Copyright 2001-2005 (C) MetaStuff, Ltd. All Rights Reserved.
255 |  | */