Created new chat manager which handles the creation of Chats.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@6213 b35dd754-fafc-0310-a699-88a17e54d16e

source/org/jivesoftware/smack/util/collections/AbstractEmptyIterator.java

@@ -0,0 +1,89 @@
+// GenericsNote: Converted.
+/*
+ *  Copyright 2004 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 org.jivesoftware.smack.util.collections;
+
+import java.util.NoSuchElementException;
+
+/**
+ * Provides an implementation of an empty iterator.
+ *
+ * @author Matt Hall, John Watkinson, Stephen Colebourne
+ * @version $Revision: 1.1 $ $Date: 2005/10/11 17:05:24 $
+ * @since Commons Collections 3.1
+ */
+abstract class AbstractEmptyIterator <E> {
+
+    /**
+     * Constructor.
+     */
+    protected AbstractEmptyIterator() {
+        super();
+    }
+
+    public boolean hasNext() {
+        return false;
+    }
+
+    public E next() {
+        throw new NoSuchElementException("Iterator contains no elements");
+    }
+
+    public boolean hasPrevious() {
+        return false;
+    }
+
+    public E previous() {
+        throw new NoSuchElementException("Iterator contains no elements");
+    }
+
+    public int nextIndex() {
+        return 0;
+    }
+
+    public int previousIndex() {
+        return -1;
+    }
+
+    public void add(E obj) {
+        throw new UnsupportedOperationException("add() not supported for empty Iterator");
+    }
+
+    public void set(E obj) {
+        throw new IllegalStateException("Iterator contains no elements");
+    }
+
+    public void remove() {
+        throw new IllegalStateException("Iterator contains no elements");
+    }
+
+    public E getKey() {
+        throw new IllegalStateException("Iterator contains no elements");
+    }
+
+    public E getValue() {
+        throw new IllegalStateException("Iterator contains no elements");
+    }
+
+    public E setValue(E value) {
+        throw new IllegalStateException("Iterator contains no elements");
+    }
+
+    public void reset() {
+        // do nothing
+    }
+
+}