1 /* ====================================================================
2 * The Apache Software License, Version 1.1
3 *
4 * Copyright (c) 2000 The Apache Software Foundation. All rights
5 * reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 *
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in
16 * the documentation and/or other materials provided with the
17 * distribution.
18 *
19 * 3. The end-user documentation included with the redistribution,
20 * if any, must include the following acknowledgment:
21 * "This product includes software developed by the
22 * Apache Software Foundation (http://www.apache.org/)."
23 * Alternately, this acknowledgment may appear in the software itself,
24 * if and wherever such third-party acknowledgments normally appear.
25 *
26 * 4. The names "Apache" and "Apache Software Foundation" must
27 * not be used to endorse or promote products derived from this
28 * software without prior written permission. For written
29 * permission, please contact apache@apache.org.
30 *
31 * 5. Products derived from this software may not be called "Apache",
32 * nor may "Apache" appear in their name, without prior written
33 * permission of the Apache Software Foundation.
34 *
35 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
36 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
37 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
38 * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
39 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
40 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
41 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
42 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
43 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
44 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
45 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
46 * SUCH DAMAGE.
47 * ====================================================================
48 *
49 * This software consists of voluntary contributions made by many
50 * individuals on behalf of the Apache Software Foundation. For more
51 * information on the Apache Software Foundation, please see
52 * <http://www.apache.org/>;.
53 *
54 * Portions of this software are based upon public domain software
55 * originally written at the National Center for Supercomputing Applications,
56 * University of Illinois, Urbana-Champaign.
57 */
58
59 package net.sourceforge.jane.lang.jjtree;
60
61 import net.sourceforge.jane.Jane;
62 import net.sourceforge.jane.JaneException;
63 import net.sourceforge.jane.lang.ClassInfo;
64 import net.sourceforge.jane.lang.LazyClassInfo;
65 import net.sourceforge.jane.jjtree.JavaImportDeclaration;
66 import net.sourceforge.jane.jjtree.ChildNodeEnumeration;
67
68 import org.apache.commons.logging.Log;
69 import org.apache.commons.logging.LogFactory;
70
71 /***
72 * A {@link LazyClassInfo} implementation that lazily loads a {@link ClassInfo}
73 * from jjTree information.
74 */
75 public class JJTreeLazyClassInfo extends LazyClassInfo
76 {
77
78 private Log log = LogFactory.getLog(JJTreeLazyClassInfo.class);
79
80 private String className;
81 private</b> String packageName;
82 private ChildNodeEnumeration imports;
83
84 /***
85 * Create a new <code>JJTreeLazyClassInfo</code>.
86 */
87 public JJTreeLazyClassInfo(Jane aJane,
88 String aPackageName,
89 String aClassName,
90 ChildNodeEnumeration theImports)
91 {
92 super(aJane);
93 packageName = aPackageName;
94 className = aClassName;
95 imports = theImports;
96 }
97
98 /***
99 * Load the delegate.
100 */
101 protected ClassInfo loadDelegate()
102 {
103 ClassInfo found = null;
104
105 found = findClassAsFullyQualified();
106
107 if (found != null)
108 return found;
109
110 found = findClassUsingExplicitImport();
111
112 if (found != null)
113 return found;
114
115 found = findClassUsingImplicitImport();
116
117 if (found != null)
118 return found;
119
120 found = findClassInPackage("java.lang");
121
122 if (found != null)
123 return found;
124
125 found = findClassInPackage(packageName);
126
127 if (found != null)
128 return found;
129
130 // TODO: Figure out how to find inner classes.
131 // TODO: Figure out what to return instead of null.
132 return null;
133 }
134
135 /***
136 * Attempt to find the specified class as fully-qualified.
137 */
138 private ClassInfo findClassAsFullyQualified()
139 {
140 try {
141 if (log.isTraceEnabled())
142 log.trace("Search for class as fully-qualified: " + className);
143 return jane.findClass(className);
144 } catch (JaneException e) {
145 log.error("Error finding class: " + className, e);
146 }
147 return null;
148 }
149
150 /***
151 * Attempt to find the specified class from an explicit import.
152 */
153 private ClassInfo findClassUsingExplicitImport()
154 {
155 ClassInfo clazz = null;
156 while (imports.hasMoreNodes()) {
157 JavaImportDeclaration node = (JavaImportDeclaration) imports.nextNode();
158 if (node.isExplicit()) {
159 String value = node.getValue();
160 if (value.endsWith("." + className)) {
161 if (log.isTraceEnabled())
162 log.trace("Search for class using explicit import: " + value);
163 try {
164 clazz = jane.findClass(value);
165 } catch (JaneException e) {
166 log.error("Error resolving: " + value, e);
167 }
168 }
169 }
170 }
171 imports.reset();
172 return clazz;
173 }
174
175 /***
176 * Attempt to find the specified class from an implicit import.
177 */
178 private ClassInfo findClassUsingImplicitImport()
179 {
180 ClassInfo clazz = null;
181 while (imports.hasMoreNodes() && clazz == null) {
182 JavaImportDeclaration node = (JavaImportDeclaration) imports.nextNode();
183 if (!node.isExplicit()) {
184 String value = node.getValue();
185 clazz = findClassInPackage(value);
186 }
187 }
188 imports.reset();
189 return clazz;
190 }
191
192 /***
193 * Attempt to find the given class in the given package.
194 */
195 private ClassInfo findClassInPackage(String pkg)
196 {
197 if (log.isTraceEnabled())
198 log.trace("Search for class in package: " + pkg);
199 try {
200 return jane.findClass(pkg + "." + className);
201 } catch (JaneException e) {
202 log.error("Error resolving: name=" + className + " pkg=" + pkg, e);
203 }
204 return null;
205 }
206
207 }
208
This page was automatically generated by Maven