1 files changed, 140 insertions, 0 deletions
diff --git a/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/LoaderUtils.java b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/LoaderUtils.java
new file mode 100644
index 00000000..e0514f65
--- /dev/null
+++ b/framework/src/ant/apache-ant-1.9.6/src/main/org/apache/tools/ant/util/LoaderUtils.java
@@ -0,0 +1,140 @@
+/*
+ *  Licensed to the Apache Software Foundation (ASF) under one or more
+ *  contributor license agreements.  See the NOTICE file distributed with
+ *  this work for additional information regarding copyright ownership.
+ *  The ASF licenses this file to You 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.apache.tools.ant.util;
+
+import java.io.File;
+
+import org.apache.tools.ant.BuildException;
+import org.apache.tools.ant.launch.Locator;
+
+// CheckStyle:HideUtilityClassConstructorCheck OFF - bc
+
+/**
+ * ClassLoader utility methods
+ *
+ */
+public class LoaderUtils {
+
+    /** Utilities used for file operations */
+    private static final FileUtils FILE_UTILS = FileUtils.getFileUtils();
+
+    /**
+     * Set the context classloader
+     *
+     * @param loader the ClassLoader to be used as the context class loader
+     *      on the current thread.
+     */
+    public static void setContextClassLoader(ClassLoader loader) {
+        Thread currentThread = Thread.currentThread();
+        currentThread.setContextClassLoader(loader);
+    }
+
+
+    /**
+     * JDK1.1 compatible access to set the context class loader.
+     *
+     * @return the ClassLoader instance being used as the context
+     *      classloader on the current thread. Returns null on JDK 1.1
+     */
+    public static ClassLoader getContextClassLoader() {
+        Thread currentThread = Thread.currentThread();
+        return currentThread.getContextClassLoader();
+    }
+
+    /**
+     * Indicates if the context class loader methods are available
+     *
+     * @return true if the get and set methods dealing with the context
+     *      classloader are available.
+     */
+    public static boolean isContextLoaderAvailable() {
+        return true;
+    }
+
+    /**
+     * Normalize a source location
+     *
+     * @param source the source location to be normalized.
+     *
+     * @return the normalized source location.
+     */
+    private static File normalizeSource(File source) {
+        if (source != null) {
+            try {
+                source = FILE_UTILS.normalize(source.getAbsolutePath());
+            } catch (BuildException e) {
+                // relative path
+            }
+        }
+
+        return source;
+    }
+
+    /**
+     * Find the directory or jar file the class has been loaded from.
+     *
+     * @param c the class whose location is required.
+     * @return the file or jar with the class or null if we cannot
+     *         determine the location.
+     *
+     * @since Ant 1.6
+     */
+    public static File getClassSource(Class c) {
+        return normalizeSource(Locator.getClassSource(c));
+    }
+
+    /**
+     * Find the directory or a give resource has been loaded from.
+     *
+     * @param c the classloader to be consulted for the source
+     * @param resource the resource whose location is required.
+     *
+     * @return the file with the resource source or null if
+     *         we cannot determine the location.
+     *
+     * @since Ant 1.6
+     */
+    public static File getResourceSource(ClassLoader c, String resource) {
+        if (c == null) {
+            c = LoaderUtils.class.getClassLoader();
+        }
+        return normalizeSource(Locator.getResourceSource(c, resource));
+    }
+
+    /**
+     * Return the resource name of a class name.
+     * @param className the name of the class to convert.
+     * @return the corresponding resource name.
+     * @since Ant 1.7.0.
+     */
+    public static String classNameToResource(String className) {
+        return className.replace('.', '/') + ".class";
+    }
+
+    /**
+     * Check if a classloader has a classname resource.
+     * @param loader the classloader to look it.
+     * @param className the name of the class to look for.
+     * @return true if the classexists, false otherwise
+     * @since Ant 1.7.0.
+     */
+    public static boolean classExists(ClassLoader loader, String className) {
+        return loader.getResource(classNameToResource(className)) != null;
+    }
+}
+