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/MapIterator.java

@@ -0,0 +1,109 @@
+// GenericsNote: Converted.
+/*
+ *  Copyright 2003-2004 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.Iterator;
+
+/**
+ * Defines an iterator that operates over a <code>Map</code>.
+ * <p/>
+ * This iterator is a special version designed for maps. It can be more
+ * efficient to use this rather than an entry set iterator where the option
+ * is available, and it is certainly more convenient.
+ * <p/>
+ * A map that provides this interface may not hold the data internally using
+ * Map Entry objects, thus this interface can avoid lots of object creation.
+ * <p/>
+ * In use, this iterator iterates through the keys in the map. After each call
+ * to <code>next()</code>, the <code>getValue()</code> method provides direct
+ * access to the value. The value can also be set using <code>setValue()</code>.
+ * <pre>
+ * MapIterator it = map.mapIterator();
+ * while (it.hasNext()) {
+ *   Object key = it.next();
+ *   Object value = it.getValue();
+ *   it.setValue(newValue);
+ * }
+ * </pre>
+ *
+ * @author Matt Hall, John Watkinson, Stephen Colebourne
+ * @version $Revision: 1.1 $ $Date: 2005/10/11 17:05:19 $
+ * @since Commons Collections 3.0
+ */
+public interface MapIterator <K,V> extends Iterator<K> {
+
+    /**
+     * Checks to see if there are more entries still to be iterated.
+     *
+     * @return <code>true</code> if the iterator has more elements
+     */
+    boolean hasNext();
+
+    /**
+     * Gets the next <em>key</em> from the <code>Map</code>.
+     *
+     * @return the next key in the iteration
+     * @throws java.util.NoSuchElementException
+     *          if the iteration is finished
+     */
+    K next();
+
+    //-----------------------------------------------------------------------
+    /**
+     * Gets the current key, which is the key returned by the last call
+     * to <code>next()</code>.
+     *
+     * @return the current key
+     * @throws IllegalStateException if <code>next()</code> has not yet been called
+     */
+    K getKey();
+
+    /**
+     * Gets the current value, which is the value associated with the last key
+     * returned by <code>next()</code>.
+     *
+     * @return the current value
+     * @throws IllegalStateException if <code>next()</code> has not yet been called
+     */
+    V getValue();
+
+    //-----------------------------------------------------------------------
+    /**
+     * Removes the last returned key from the underlying <code>Map</code> (optional operation).
+     * <p/>
+     * This method can be called once per call to <code>next()</code>.
+     *
+     * @throws UnsupportedOperationException if remove is not supported by the map
+     * @throws IllegalStateException         if <code>next()</code> has not yet been called
+     * @throws IllegalStateException         if <code>remove()</code> has already been called
+     *                                       since the last call to <code>next()</code>
+     */
+    void remove();
+
+    /**
+     * Sets the value associated with the current key (optional operation).
+     *
+     * @param value the new value
+     * @return the previous value
+     * @throws UnsupportedOperationException if setValue is not supported by the map
+     * @throws IllegalStateException         if <code>next()</code> has not yet been called
+     * @throws IllegalStateException         if <code>remove()</code> has been called since the
+     *                                       last call to <code>next()</code>
+     */
+    V setValue(V value);
+
+}