fixed Bug 1024299

[phpeclipse.git] / archive / net.sourceforge.phpeclipse.quantum.sql / src / com / quantum / util / JarUtil.java

diff --git a/archive/net.sourceforge.phpeclipse.quantum.sql/src/com/quantum/util/JarUtil.java b/archive/net.sourceforge.phpeclipse.quantum.sql/src/com/quantum/util/JarUtil.java
index c30bdad..528221e 100644 (file)
--- a/archive/net.sourceforge.phpeclipse.quantum.sql/src/com/quantum/util/JarUtil.java
+++ b/archive/net.sourceforge.phpeclipse.quantum.sql/src/com/quantum/util/JarUtil.java
@@ -21,50 +21,112 @@ public class JarUtil {
 
     private static Hashtable classLoaderCache = new Hashtable();
        
-       public static Driver loadDriver(String driverFile, String className) {
+       public static Driver loadDriver(String[] driverFiles, String className) {
                Driver result = null;
                try {
-               File file = new File(driverFile);
-               if (file.exists() && file.isFile()) {
-                       URLClassLoader loader = getURLClassLoader(file);
-                       Class driverClass = loader.loadClass(className);
+                       Class driverClass = loadDriverClass(driverFiles, className);
+                       if (driverClass != null) {
                    try {
                        result = (Driver) driverClass.newInstance();
                    } catch (ClassCastException e) {
                    }
                }
-               } catch (MalformedURLException e) {
-               } catch (ClassNotFoundException e) {
                } catch (InstantiationException e) {
                } catch (IllegalAccessException e) {
+               } catch (NoClassDefFoundError e) {
+               } catch (RuntimeException e) {
                }
                return result;
        }
        
-       public static String[] getAllDriverNames(String driverFile) {
+       public static Class loadDriverClass(String[] driverFiles, String className) {
+               Class result = null;
+               if (driverFiles != null && driverFiles.length > 0 
+                               && driverFiles[0].trim().length() > 0 && className != null) {
+                       try {
+                       File[] files = getFiles(driverFiles);
+                       URLClassLoader loader = getURLClassLoader(files);
+                       result = loadDriverClass(className, loader);
+                       } catch (MalformedURLException e) {
+                       } catch (ClassNotFoundException e) {
+                       } catch (NoClassDefFoundError e) {
+                       } catch (RuntimeException e) {
+                       }
+               } else if (className != null) {
+                       try {
+                               result = loadDriverClass(className, JarUtil.class.getClassLoader());
+                       } catch (ClassNotFoundException e) {
+                       } catch (NoClassDefFoundError e) {
+                       } catch (RuntimeException e) {
+                       }
+               }
+               return result;
+       }
+       
+       /**
+        * @param driverFiles
+        * @return
+        */
+       private static File[] getFiles(String[] driverFiles) {
+               List list = new ArrayList();
+               
+               for (int i = 0, length = driverFiles == null ? 0 : driverFiles.length; i < length; i++) {
+                       File file = new File(driverFiles[i]);
+                       if (file.exists() && file.isFile()) {
+                               list.add(file);
+                       }
+               }
+               return (File[]) list.toArray(new File[list.size()]);
+       }
+
+       /**
+        * @param className
+        * @param loader
+        * @return
+        * @throws ClassNotFoundException
+        */
+       private static Class loadDriverClass(String className, ClassLoader loader) throws ClassNotFoundException {
+               Class driverClass = loader.loadClass(className);
+               return Driver.class.isAssignableFrom(driverClass) ? driverClass : null;
+       }
+
+       public static String[] getAllDriverNames(String[] driverFile) {
                List list = new ArrayList();
                try {
-                       File file = new File(driverFile);
-                       URLClassLoader loader = getURLClassLoader(file);
-                       JarFile jar = new JarFile(file);
-                       for (Enumeration e = jar.entries(); e.hasMoreElements(); ) {
-                               JarEntry entry = (JarEntry) e.nextElement();
-                               String className = getClassNameFromFileName(entry.getName());
-                               if (className != null) {
-                                       try {
-                                               Class driverClass = loader.loadClass(className);
-                                               if (Driver.class.isAssignableFrom(driverClass)) {
-                                                       list.add(className);
-                                               }
-                                       } catch (ClassNotFoundException ex) {
-                                       }
-                               }
+                       File[] files = getFiles(driverFile);
+                       URLClassLoader loader = getURLClassLoader(files);
+                       for (int i = 0, length = files == null ? 0 : files.length; i < length; i++) {
+                               JarFile jar = new JarFile(files[i]);
+                               addCandidateDriversToList(list, loader, jar);
                        }
                } catch (IOException e) {
                }
                return (String[]) list.toArray(new String[list.size()]);
        }
        
+       /**
+        * @param list
+        * @param loader
+        * @param jar
+        */
+       private static void addCandidateDriversToList(List list, URLClassLoader loader, JarFile jar) {
+               for (Enumeration e = jar.entries(); e.hasMoreElements(); ) {
+                       JarEntry entry = (JarEntry) e.nextElement();
+                       String className = getClassNameFromFileName(entry.getName());
+                       if (className != null) {
+                               try {
+                                       Class driverClass = loadDriverClass(className, loader);
+                                       if (driverClass != null) {
+                                               list.add(className);
+                                       }
+                               } catch (NoClassDefFoundError ex) {
+                               } catch (ClassNotFoundException ex) {
+                               } catch (RuntimeException ex) {
+                               }
+                       }
+               }
+       }
+
        private static String getClassNameFromFileName(String name) {
                String result = null;
                if (name.endsWith(".class")) {
@@ -78,16 +140,36 @@ public class JarUtil {
         * @return
         * @throws MalformedURLException
         */
-       private static URLClassLoader getURLClassLoader(File file) throws MalformedURLException {
-               String driverFile = file.getAbsolutePath();
+       private static URLClassLoader getURLClassLoader(File[] files) throws MalformedURLException {
+               
+               String driverPath = getFilePath(files);
                URLClassLoader loader =
-                   (URLClassLoader) classLoaderCache.get(driverFile);
+                   (URLClassLoader) classLoaderCache.get(driverPath);
                if (loader == null) {
-                   URL urls[] = new URL[1];
-                   urls[0] = file.toURL();
-                   loader = new URLClassLoader(urls);
-                   classLoaderCache.put(driverFile, loader);
+                   URL urls[] = new URL[files == null ? 0 : files.length];
+                   for (int i = 0, length = urls.length; i < length; i++) {
+                           urls[i] = files[i].toURL();
+                       }
+                   loader = urls.length > 0 ? new URLClassLoader(urls) : null;
+                   if (loader != null) {
+                       classLoaderCache.put(driverPath, loader);
+                   }
                }
                return loader;
        }
+
+       /**
+        * @param files
+        * @return
+        */
+       private static String getFilePath(File[] files) {
+               StringBuffer buffer = new StringBuffer();
+               for (int i = 0, length = files == null ? 0 : files.length; i < length; i++) {
+                       buffer.append(files[i].getAbsolutePath());
+                       if (i < length-1) {
+                               buffer.append(File.pathSeparator);
+                       }
+               }
+               return buffer.toString();
+       }
 }