Java > Open Source Codes > org > jfree > xml > generator > JavaSourceCollector


1 /* ========================================================================
2  * JCommon : a free general purpose class library for the Java(tm) platform
3  * ========================================================================
4  *
5  * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
6  *
7  * Project Info: http://www.jfree.org/jcommon/index.html
8  *
9  * This library is free software; you can redistribute it and/or modify it
10  * under the terms of the GNU Lesser General Public License as published by
11  * the Free Software Foundation; either version 2.1 of the License, or
12  * (at your option) any later version.
13  *
14  * This library is distributed in the hope that it will be useful, but
15  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16  * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
17  * License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with this library; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
22  * USA.
23  *
24  * [Java is a trademark or registered trademark of Sun Microsystems, Inc.
25  * in the United States and other countries.]
26  *
27  * ------------------------
28  * JavaSourceCollector.java
29  * ------------------------
30  * (C)opyright 2003, 2004, by Thomas Morgner and Contributors.
31  *
32  * Original Author: Thomas Morgner;
33  * Contributor(s): David Gilbert (for Object Refinery Limited);
34  *
35  * $Id: JavaSourceCollector.java,v 1.3 2005/10/18 13:32:20 mungady Exp $
36  *
37  * Changes
38  * -------------------------
39  * 21.06.2003 : Initial version
40  *
41  */
42
43 package org.jfree.xml.generator;
44
45 import java.io.File ;
46 import java.io.FileFilter ;
47 import java.lang.reflect.Modifier ;
48 import java.util.ArrayList ;
49
50 import org.jfree.ui.ExtensionFileFilter;
51 import org.jfree.util.Log;
52 import org.jfree.util.ObjectUtilities;
53
54 /**
55  * The class collects all class-files and loads the class objects named
56  * by these files.
57  */
58 public class JavaSourceCollector implements SourceCollector {
59
60     /**
61      * A file filter.
62      */
63     private static class CollectorFileFilter extends ExtensionFileFilter implements FileFilter {
64         /**
65          * Creates a new instance.
66          *
67          * @param description the file description.
68          * @param extension the file extension.
69          */
70         public CollectorFileFilter(final String description, final String extension) {
71             super(description, extension);
72         }
73     }
74
75     /** A file filter. */
76     private CollectorFileFilter eff;
77     
78     /** The file list. */
79     private ArrayList fileList;
80     
81     /** A list of ignored packages. */
82     private ArrayList ignoredPackages;
83
84     /** A list of ignored base classes. */
85     private ArrayList ignoredBaseClasses;
86     
87     /** The start directory. */
88     private File startDirectory;
89     
90     /** The initial package name. */
91     private String initialPackageName;
92
93     /**
94      * Creates a new source collector.
95      *
96      * @param startDirectory the start directory.
97      */
98     public JavaSourceCollector(final File startDirectory) {
99         this(startDirectory, "");
100     }
101
102     /**
103      * Creates a new source collector.
104      *
105      * @param startDirectory the base directory.
106      * @param packageName the base package name.
107      */
108     public JavaSourceCollector(final File startDirectory, final String packageName) {
109         this.eff = new CollectorFileFilter("<ignore>", ".java");
110         this.fileList = new ArrayList ();
111         this.startDirectory = startDirectory;
112         this.initialPackageName = packageName;
113         this.ignoredPackages = new ArrayList ();
114         this.ignoredBaseClasses = new ArrayList ();
115     }
116
117     /**
118      * Adds a package that should be ignored.
119      *
120      * @param pkg the package name.
121      */
122     public void addIgnoredPackage(final String pkg) {
123         Log.debug (new Log.SimpleMessage("Added IgnPackage: " , pkg));
124         this.ignoredPackages.add(pkg);
125     }
126
127     /**
128      * Adds a base class that should be ignored.
129      *
130      * @param baseClass the base class name.
131      */
132     public void addIgnoredBaseClass(final String baseClass) {
133         final Class loadedClass = loadClass(baseClass);
134         if (loadedClass != null) {
135             Log.debug (new Log.SimpleMessage("Added IgnClass: " , baseClass));
136             this.ignoredBaseClasses.add(loadedClass);
137         }
138     }
139
140     /**
141      * Adds a class to the list of ignored base classes.
142      *
143      * @param baseClass the class.
144      */
145     public void addIgnoredBaseClass(final Class baseClass) {
146         this.ignoredBaseClasses.add(baseClass);
147     }
148
149     /**
150      * Returns <code>true</code> if the named class is being ignored (because of the package that
151      * it belongs to), and <code>false</code> otherwise.
152      *
153      * @param classname the name of the class to test.
154      *
155      * @return A boolean.
156      */
157     protected boolean isIgnoredPackage(final String classname) {
158         for (int i = 0; i < this.ignoredPackages.size(); i++) {
159             final String ignoredPackage = (String ) this.ignoredPackages.get(i);
160             if (classname.startsWith(ignoredPackage)) {
161                 return true;
162             }
163         }
164         return false;
165     }
166
167     /**
168      * Returns <code>true</code> if the named class is being ignored (because it is a descendant
169      * of an ignored base class), and <code>false</code> otherwise.
170      *
171      * @param c the class name.
172      *
173      * @return A boolean.
174      */
175     protected boolean isIgnoredBaseClass(final Class c) {
176         for (int i = 0; i < this.ignoredBaseClasses.size(); i++) {
177             final Class ignoredClass = (Class ) this.ignoredBaseClasses.get(i);
178             if (ignoredClass.isAssignableFrom(c)) {
179                 return true;
180             }
181         }
182         return false;
183     }
184
185     /**
186      * Collects the files/classes.
187      */
188     public void collectFiles() {
189         collectFiles(this.startDirectory, this.initialPackageName);
190     }
191
192     /**
193      * Collects the files/classes.
194      *
195      * @param directory the starting directory.
196      * @param packageName the initial package name.
197      */
198     protected void collectFiles(final File directory, final String packageName) {
199         final File [] files = directory.listFiles(this.eff);
200         for (int i = 0; i < files.length; i++) {
201             if (files[i].isDirectory()) {
202                 collectFiles(files[i], buildJavaName(packageName, files[i].getName()));
203             }
204             else {
205                 final String fname = files[i].getName();
206                 final String className = fname.substring(0, fname.length() - 5);
207                 final String fullName = buildJavaName(packageName, className);
208                 if (isIgnoredPackage(fullName)) {
209                     Log.debug (new Log.SimpleMessage("Do not process: Ignored: ", className));
210                     continue;
211                 }
212                 final Class jclass = loadClass(fullName);
213                 if (jclass == null || isIgnoredBaseClass(jclass)) {
214                     continue;
215                 }
216                 if (jclass.isInterface() || Modifier.isAbstract(jclass.getModifiers())) {
217                     Log.debug (new Log.SimpleMessage("Do not process: Abstract: ", className));
218                     continue;
219                 }
220                 if (!Modifier.isPublic(jclass.getModifiers())) {
221                     Log.debug (new Log.SimpleMessage("Do not process: Not public: ", className));
222                     continue;
223                 }
224                 this.fileList.add(jclass);
225             }
226         }
227     }
228
229     /**
230      * Loads a class by its fully qualified name.
231      *
232      * @param name the class name.
233      *
234      * @return The class (or <code>null</code> if there was a problem loading the class).
235      */
236     protected Class loadClass(final String name) {
237         try {
238             return ObjectUtilities.getClassLoader(JavaSourceCollector.class).loadClass(name);
239         }
240         catch (Exception e) {
241             Log.warn (new Log.SimpleMessage("Do not process: Failed to load class:", name));
242             return null;
243         }
244     }
245
246     /**
247      * Creates a fully qualified Java class or package name.
248      *
249      * @param packageName the base package name.
250      * @param newPackage the class/package name.
251      *
252      * @return The fully qualified package/class name.
253      */
254     protected String buildJavaName(final String packageName, final String newPackage) {
255         if (packageName.length() == 0) {
256             return newPackage;
257         }
258         else {
259             return packageName + "." + newPackage;
260         }
261     }
262
263     /**
264      * Returns the list of classes as an array.
265      *
266      * @return The list of classes.
267      */
268     public Class [] getClasses() {
269         return (Class []) this.fileList.toArray(new Class [0]);
270     }
271     
272 }
273

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