[Arakhnê-Dev] [38] Add getSubClasses() function into ReflectionUtil class.

[subversion@xxxxxxxxxxxxx]

Revision: 38
Author:   galland
Date:     2009-04-03 01:04:53 +0200 (Fri, 03 Apr 2009)

Log Message:
-----------
Add getSubClasses() function into ReflectionUtil class.

Modified Paths:
--------------
    trunk/arakhneVmutils/java/src/main/java/org/arakhne/vmutil/ReflectionUtil.java
    trunk/arakhneVmutils/java/src/main/resources/Changelog
    trunk/arakhneVmutils/java/src/main/resources/VERSION
    trunk/pom.xml


Modified: trunk/arakhneVmutils/java/src/main/java/org/arakhne/vmutil/ReflectionUtil.java
===================================================================
--- trunk/arakhneVmutils/java/src/main/java/org/arakhne/vmutil/ReflectionUtil.java	2009-03-10 10:17:48 UTC (rev 37)
+++ trunk/arakhneVmutils/java/src/main/java/org/arakhne/vmutil/ReflectionUtil.java	2009-04-02 23:04:53 UTC (rev 38)
@@ -26,6 +26,7 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Enumeration;
+import java.util.List;
 import java.util.jar.JarEntry;
 import java.util.jar.JarFile;
 
@@ -333,4 +334,109 @@
 		}
 	}
 	
+	/**
+	 * Replies the list of all the subclasses of the given class
+	 * in the current classpath..
+	 * @param className is the name of the class to explore.
+	 * @return the list of subclasses.
+	 */
+	public static <T> Collection<Class<? extends T>> getSubClasses(Class<T> className) {
+		Collection<Class<? extends T>> classes = new ArrayList<Class<? extends T>>();
+	 
+		String[] entries = System.getProperty("java.class.path").split(System.getProperty("path.separator")); //$NON-NLS-1$//$NON-NLS-2$
+		String lentry;			
+		
+		for(String path : entries) {
+			lentry = path.toLowerCase();
+			if(lentry.endsWith(".jar") || lentry.endsWith(".war")) { //$NON-NLS-1$//$NON-NLS-2$
+				getSubClassesFromJar(classes, path, className);
+			}else{
+				getSubClassesFromFileSystem(classes, path, className);
+			}
+	 
+		}
+	 
+		return classes;
+	}
+
+	@SuppressWarnings("unchecked")
+	private static <T> void getSubClassesFromJar(Collection<Class<? extends T>> classes, String jarFilename, Class<T> className) {
+		try {
+			JarFile jarFile = new JarFile(jarFilename);
+			String classN = className.getCanonicalName();
+			if (classN!=null) {
+				Enumeration<JarEntry> entries = jarFile.entries();
+				JarEntry entry;
+				String entryPath, entryClassname;
+				
+				while (entries.hasMoreElements()) {
+					entry = entries.nextElement();
+					entryPath = entry.getName();
+		
+					// In package and not inner class
+					if (entryPath.endsWith(".class") //$NON-NLS-1$
+						&& !entryPath.contains("$")) { //$NON-NLS-1$
+						entryClassname = entryPath.substring(0, entryPath.length()-6).replaceAll(File.separator, "."); //$NON-NLS-1$
+						try {
+							Class<?> clazz = Class.forName(entryClassname);
+							if (className.isAssignableFrom(clazz))
+								classes.add((Class<? extends T>)clazz);
+						}
+						catch(Throwable _) {
+							//
+						}
+					}	
+				}
+			}
+		}
+		catch(IOException _) {
+			//
+		}
+	}
+
+	@SuppressWarnings("unchecked")
+	private static <T> void getSubClassesFromFileSystem(Collection<Class<? extends T>> classes, String directory, Class<T> className) {
+		String classN = className.getCanonicalName();
+		if (classN!=null) {
+			List<String> directories = new ArrayList<String>();
+			directories.add(""); //$NON-NLS-1$
+			
+			String ldir, entryClassname;
+			File dir, fullFile;
+			
+			while (!directories.isEmpty()) {
+				ldir = directories.remove(0);
+				dir = new File(directory, ldir);
+				if (dir.isDirectory()) {
+					for(String entryPath : dir.list()) {
+			
+						fullFile = new File(dir,entryPath);
+						
+						if (fullFile.isDirectory()) {
+							if (ldir==null || "".equals(ldir)) { //$NON-NLS-1$
+								directories.add(entryPath);
+							}
+							else {
+								directories.add(new File(ldir,entryPath).toString());
+							}
+						}
+						// In package and not inner class
+						else if (entryPath.endsWith(".class") //$NON-NLS-1$
+							&& !entryPath.contains("$")) { //$NON-NLS-1$
+							entryClassname = ldir.replaceAll(File.separator, ".") + "." + FileSystem.shortBasename(entryPath); //$NON-NLS-1$ //$NON-NLS-2$
+							try {
+								Class<?> clazz = Class.forName(entryClassname);
+								if (className.isAssignableFrom(clazz))
+									classes.add((Class<? extends T>)clazz);
+							}
+							catch(Throwable _) {
+								//
+							}
+						}
+					}
+				}
+			}
+		}
+	}
+	
 }

Modified: trunk/arakhneVmutils/java/src/main/resources/Changelog
===================================================================
--- trunk/arakhneVmutils/java/src/main/resources/Changelog	2009-03-10 10:17:48 UTC (rev 37)
+++ trunk/arakhneVmutils/java/src/main/resources/Changelog	2009-04-02 23:04:53 UTC (rev 38)
@@ -1,3 +1,9 @@
+arakhneVmutils-4.0
+
+* Add function getSubClasses() in ReflectionUtil class.
+
+-- Stephane GALLAND <galland@xxxxxxxxxxx> Fri, 03 Apr 2009 01:03:45 +0200
+
 arakhneVmutils-3.0
 
 * Add class ReflectionUtil.

Modified: trunk/arakhneVmutils/java/src/main/resources/VERSION
===================================================================
--- trunk/arakhneVmutils/java/src/main/resources/VERSION	2009-03-10 10:17:48 UTC (rev 37)
+++ trunk/arakhneVmutils/java/src/main/resources/VERSION	2009-04-02 23:04:53 UTC (rev 38)
@@ -1 +1 @@
-arakhneVmutils 3.0
+arakhneVmutils 4.0

Modified: trunk/pom.xml
===================================================================
--- trunk/pom.xml	2009-03-10 10:17:48 UTC (rev 37)
+++ trunk/pom.xml	2009-04-02 23:04:53 UTC (rev 38)
@@ -19,7 +19,7 @@
 		<version_myjdk>1.6</version_myjdk>
 		<version_arakhnelogger>1.1-SNAPSHOT</version_arakhnelogger>
 		<version_arakhnerefs>5.1-SNAPSHOT</version_arakhnerefs>
-		<version_arakhnevmutils>3.0-SNAPSHOT</version_arakhnevmutils>
+		<version_arakhnevmutils>4.0-SNAPSHOT</version_arakhnevmutils>
 	</properties>
 
 	<dependencyManagement>