Initial checkin of Spark Open Source

git-svn-id: http://svn.igniterealtime.org/svn/repos/spark/trunk@4456 b35dd754-fafc-0310-a699-88a17e54d16e

src/java/org/jivesoftware/spark/plugin/PluginClassLoader.java

@@ -0,0 +1,74 @@
+/**
+ * $Revision: $
+ * $Date: $
+ *
+ * Copyright (C) 2006 Jive Software. All rights reserved.
+ *
+ * This software is published under the terms of the GNU Lesser Public License (LGPL),
+ * a copy of which is included in this distribution.
+ */
+
+package org.jivesoftware.spark.plugin;
+
+import java.io.File;
+import java.io.FilenameFilter;
+import java.net.MalformedURLException;
+import java.net.URL;
+import java.net.URLClassLoader;
+
+/**
+ * A simple classloader to extend the classpath to
+ * include all jars in a lib directory.<p>
+ * <p/>
+ * The new classpath includes all <tt>*.jar files.
+ *
+ * @author Derek DeMoro
+ */
+public class PluginClassLoader extends URLClassLoader {
+
+    /**
+     * Constructs the classloader.
+     *
+     * @param parent the parent class loader (or null for none).
+     * @param libDir the directory to load jar files from.
+     * @throws java.net.MalformedURLException if the libDir path is not valid.
+     */
+    public PluginClassLoader(ClassLoader parent, File libDir) throws MalformedURLException {
+        super(new URL[]{libDir.toURL()}, parent);
+    }
+
+    /**
+     * Adds all archives in a plugin to the classpath.
+     *
+     * @param pluginDir the directory of the plugin.
+     * @throws MalformedURLException the exception thrown if URL is not valid.
+     */
+    public void addPlugin(File pluginDir) throws MalformedURLException {
+        File libDir = new File(pluginDir, "lib");
+
+        File[] jars = libDir.listFiles(new FilenameFilter() {
+            public boolean accept(File dir, String name) {
+                boolean accept = false;
+                String smallName = name.toLowerCase();
+                if (smallName.endsWith(".jar")) {
+                    accept = true;
+                }
+                else if (smallName.endsWith(".zip")) {
+                    accept = true;
+                }
+                return accept;
+            }
+        });
+
+        // Do nothing if no jar or zip files were found
+        if (jars == null) {
+            return;
+        }
+
+        for (int i = 0; i < jars.length; i++) {
+            if (jars[i].isFile()) {
+                addURL(jars[i].toURL());
+            }
+        }
+    }
+}