From: Erik Brakkee <erik@brakkee.org>
Date: Sat, 2 Sep 2006 20:10:33 +0000 (+0000)
Subject: (no commit message)
X-Git-Tag: wamblee-utils-0.7~920
X-Git-Url: http://wamblee.org/gitweb/?a=commitdiff_plain;h=5c51df8069feb393d1c2118b3d4ba52d612cb46d;p=utils

---

diff --git a/support/src/main/java/org/wamblee/general/ClassPathHacker.java b/support/src/main/java/org/wamblee/general/ClassPathHacker.java
new file mode 100644
index 00000000..b8d52738
--- /dev/null
+++ b/support/src/main/java/org/wamblee/general/ClassPathHacker.java
@@ -0,0 +1,72 @@
+/*
+ * Copyright 2006 the original author or authors.
+ * 
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.wamblee.general;
+
+import java.io.IOException;
+import java.io.File;
+import java.net.URLClassLoader;
+import java.net.URL;
+import java.lang.reflect.Method;
+
+public class ClassPathHacker {
+
+    private static final Class[] PARAMETERS = new Class[] { URL.class };
+
+    private static final String JAR_SUFFIX = ".jar";
+
+    public static void addJarsInDirectory(File aDirectory) throws IOException {
+        System.out.println("directory '" + aDirectory + "'");
+
+        for (File aFile : aDirectory.listFiles()) {
+            System.out
+                    .println("Considering '" + aFile.getCanonicalPath() + "'");
+            if (aFile.getName().toLowerCase().endsWith(JAR_SUFFIX)) {
+                System.out.println("Adding '" + aFile.getCanonicalPath()
+                        + "' to classpath.");
+                addFile(aFile);
+            }
+        }
+    }
+
+    public static void addFile(String s) throws IOException {
+        File f = new File(s);
+        addFile(f);
+    }
+
+    public static void addFile(File f) throws IOException {
+        addURL(f.toURL());
+    }
+
+    public static void addURL(URL u) throws IOException {
+
+        URLClassLoader sysloader = (URLClassLoader) ClassLoader
+                .getSystemClassLoader();
+        Class sysclass = URLClassLoader.class;
+
+        try {
+            Method method = sysclass.getDeclaredMethod("addURL", PARAMETERS);
+            method.setAccessible(true);
+            method.invoke(sysloader, new Object[] { u });
+        } catch (Throwable t) {
+            t.printStackTrace();
+            throw new IOException(
+                    "Error, could not add URL to system classloader");
+        }
+
+    }
+
+}