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/AbstractMapEntry.java

@@ -0,0 +1,89 @@
+// 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.Map;
+
+/**
+ * Abstract Pair class to assist with creating correct Map Entry implementations.
+ *
+ * @author James Strachan
+ * @author Michael A. Smith
+ * @author Neil O'Toole
+ * @author Matt Hall, John Watkinson, Stephen Colebourne
+ * @version $Revision: 1.1 $ $Date: 2005/10/11 17:05:32 $
+ * @since Commons Collections 3.0
+ */
+public abstract class AbstractMapEntry <K,V> extends AbstractKeyValue<K, V> implements Map.Entry<K, V> {
+
+    /**
+     * Constructs a new entry with the given key and given value.
+     *
+     * @param key   the key for the entry, may be null
+     * @param value the value for the entry, may be null
+     */
+    protected AbstractMapEntry(K key, V value) {
+        super(key, value);
+    }
+
+    // Map.Entry interface
+    //-------------------------------------------------------------------------
+    /**
+     * Sets the value stored in this Map Entry.
+     * <p/>
+     * This Map Entry is not connected to a Map, so only the local data is changed.
+     *
+     * @param value the new value
+     * @return the previous value
+     */
+    public V setValue(V value) {
+        V answer = this.value;
+        this.value = value;
+        return answer;
+    }
+
+    /**
+     * Compares this Map Entry with another Map Entry.
+     * <p/>
+     * Implemented per API documentation of {@link java.util.Map.Entry#equals(Object)}
+     *
+     * @param obj the object to compare to
+     * @return true if equal key and value
+     */
+    public boolean equals(Object obj) {
+        if (obj == this) {
+            return true;
+        }
+        if (obj instanceof Map.Entry == false) {
+            return false;
+        }
+        Map.Entry other = (Map.Entry) obj;
+        return (getKey() == null ? other.getKey() == null : getKey().equals(other.getKey())) && (getValue() == null ? other.getValue() == null : getValue().equals(other.getValue()));
+    }
+
+    /**
+     * Gets a hashCode compatible with the equals method.
+     * <p/>
+     * Implemented per API documentation of {@link java.util.Map.Entry#hashCode()}
+     *
+     * @return a suitable hash code
+     */
+    public int hashCode() {
+        return (getKey() == null ? 0 : getKey().hashCode()) ^ (getValue() == null ? 0 : getValue().hashCode());
+    }
+
+}