update odlux and featureaggregator

v2 update odlux and featureaggregator bundles

Issue-ID: SDNC-1008
Signed-off-by: herbert <herbert.eiselt@highstreet-technologies.com>
Change-Id: I0018d7bfa3a0e6896c1b210b539a574af9808e22
Signed-off-by: herbert <herbert.eiselt@highstreet-technologies.com>

1 files changed, 238 insertions, 0 deletions

diff --git a/sdnr/wt/odlux/core/model/src/main/java/com/opensymphony/xwork2/util/ClassLoaderUtil.java b/sdnr/wt/odlux/core/model/src/main/java/com/opensymphony/xwork2/util/ClassLoaderUtil.java
new file mode 100644
index 000000000..133b08494
--- /dev/null
+++ b/sdnr/wt/odlux/core/model/src/main/java/com/opensymphony/xwork2/util/ClassLoaderUtil.java
@@ -0,0 +1,238 @@
+/*
+ * Copyright 2002-2003,2009 The Apache Software Foundation.
+ *
+ * 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 com.opensymphony.xwork2.util;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.util.*;
+
+
+/**
+ * This class is extremely useful for loading resources and classes in a fault tolerant manner
+ * that works across different applications servers.
+ *
+ * It has come out of many months of frustrating use of multiple application servers at Atlassian,
+ * please don't change things unless you're sure they're not going to break in one server or another!
+ *
+ * It was brought in from oscore trunk revision 147.
+ *
+ * @author $Author$
+ * @version $Revision$
+ */
+public class ClassLoaderUtil {
+    //~ Methods ////////////////////////////////////////////////////////////////
+
+    /**
+     * Load all resources with a given name, potentially aggregating all results
+     * from the searched classloaders.  If no results are found, the resource name
+     * is prepended by '/' and tried again.
+     *
+     * This method will try to load the resources using the following methods (in order):
+     * <ul>
+     *  <li>From Thread.currentThread().getContextClassLoader()
+     *  <li>From ClassLoaderUtil.class.getClassLoader()
+     *  <li>callingClass.getClassLoader()
+     * </ul>
+     *
+     * @param resourceName The name of the resources to load
+     * @param callingClass The Class object of the calling object
+     */
+     public static Iterator<URL> getResources(String resourceName, Class<?> callingClass, boolean aggregate) throws IOException {
+
+         AggregateIterator<URL> iterator = new AggregateIterator<>();
+
+         iterator.addEnumeration(Thread.currentThread().getContextClassLoader().getResources(resourceName));
+
+         if (!iterator.hasNext() || aggregate) {
+             iterator.addEnumeration(ClassLoaderUtil.class.getClassLoader().getResources(resourceName));
+         }
+
+         if (!iterator.hasNext() || aggregate) {
+             ClassLoader cl = callingClass.getClassLoader();
+
+             if (cl != null) {
+                 iterator.addEnumeration(cl.getResources(resourceName));
+             }
+         }
+
+         if (!iterator.hasNext() && resourceName != null && (resourceName.length() == 0 || resourceName.charAt(0) != '/')) {
+             return getResources('/' + resourceName, callingClass, aggregate);
+         }
+
+         return iterator;
+     }
+
+    /**
+    * Load a given resource.
+    *
+    * This method will try to load the resource using the following methods (in order):
+    * <ul>
+    *  <li>From Thread.currentThread().getContextClassLoader()
+    *  <li>From ClassLoaderUtil.class.getClassLoader()
+    *  <li>callingClass.getClassLoader()
+    * </ul>
+    *
+    * @param resourceName The name IllegalStateException("Unable to call ")of the resource to load
+    * @param callingClass The Class object of the calling object
+    */
+    public static URL getResource(String resourceName, Class<?> callingClass) {
+        URL url = Thread.currentThread().getContextClassLoader().getResource(resourceName);
+
+        if (url == null) {
+            url = ClassLoaderUtil.class.getClassLoader().getResource(resourceName);
+        }
+
+        if (url == null) {
+            ClassLoader cl = callingClass.getClassLoader();
+
+            if (cl != null) {
+                url = cl.getResource(resourceName);
+            }
+        }
+
+        if (url == null && resourceName != null && (resourceName.length() == 0 || resourceName.charAt(0) != '/')) {
+            return getResource('/' + resourceName, callingClass);
+        }
+
+        return url;
+    }
+
+    /**
+    * This is a convenience method to load a resource as a stream.
+    *
+    * The algorithm used to find the resource is given in getResource()
+    *
+    * @param resourceName The name of the resource to load
+    * @param callingClass The Class object of the calling object
+    */
+    public static InputStream getResourceAsStream(String resourceName, Class<?> callingClass) {
+        URL url = getResource(resourceName, callingClass);
+
+        try {
+            return url != null ? url.openStream() : null;
+        } catch (IOException e) {
+            return null;
+        }
+    }
+
+    /**
+    * Load a class with a given name.
+    *
+    * It will try to load the class in the following order:
+    * <ul>
+    *  <li>From Thread.currentThread().getContextClassLoader()
+    *  <li>Using the basic Class.forName()
+    *  <li>From ClassLoaderUtil.class.getClassLoader()
+    *  <li>From the callingClass.getClassLoader()
+    * </ul>
+    *
+    * @param className The name of the class to load
+    * @param callingClass The Class object of the calling object
+    * @throws ClassNotFoundException If the class cannot be found anywhere.
+    */
+    public static Class<?> loadClass(String className, Class<?> callingClass) throws ClassNotFoundException {
+        try {
+            return Thread.currentThread().getContextClassLoader().loadClass(className);
+        } catch (ClassNotFoundException e) {
+            try {
+                return Class.forName(className);
+            } catch (ClassNotFoundException ex) {
+                try {
+                    return ClassLoaderUtil.class.getClassLoader().loadClass(className);
+                } catch (ClassNotFoundException exc) {
+                    return callingClass.getClassLoader().loadClass(className);
+                }
+            }
+        }
+    }
+
+    /**
+     * Aggregates Enumeration instances into one iterator and filters out duplicates.  Always keeps one
+     * ahead of the enumerator to protect against returning duplicates.
+     */
+    static class AggregateIterator<E> implements Iterator<E> {
+
+        LinkedList<Enumeration<E>> enums = new LinkedList<>();
+        Enumeration<E> cur = null;
+        E next = null;
+        Set<E> loaded = new HashSet<>();
+
+        public AggregateIterator<E> addEnumeration(Enumeration<E> e) {
+            if (e.hasMoreElements()) {
+                if (cur == null) {
+                    cur = e;
+                    next = e.nextElement();
+                    loaded.add(next);
+                } else {
+                    enums.add(e);
+                }
+            }
+            return this;
+        }
+
+        @Override
+        public boolean hasNext() {
+            return next != null;
+        }
+
+        @Override
+        public E next() {
+            if (next != null) {
+                E prev = next;
+                next = loadNext();
+                return prev;
+            } else {
+                throw new NoSuchElementException();
+            }
+        }
+
+        private Enumeration<E> determineCurrentEnumeration() {
+            if (cur != null && !cur.hasMoreElements()) {
+                if (enums.size() > 0) {
+                    cur = enums.removeLast();
+                } else {
+                    cur = null;
+                }
+            }
+            return cur;
+        }
+
+        private E loadNext() {
+            if (determineCurrentEnumeration() != null) {
+                E tmp = cur.nextElement();
+                int loadedSize = loaded.size();
+                while (loaded.contains(tmp)) {
+                    tmp = loadNext();
+                    if (tmp == null || loaded.size() > loadedSize) {
+                        break;
+                    }
+                }
+                if (tmp != null) {
+                    loaded.add(tmp);
+                }
+                return tmp;
+            }
+            return null;
+
+        }
+
+        @Override
+        public void remove() {
+            throw new UnsupportedOperationException();
+        }
+    }
+}