1 files changed, 61 insertions, 0 deletions
diff --git a/src/org/jivesoftware/smack/filter/PacketExtensionFilter.java b/src/org/jivesoftware/smack/filter/PacketExtensionFilter.java
new file mode 100644
index 0000000..3cdc09c
--- /dev/null
+++ b/src/org/jivesoftware/smack/filter/PacketExtensionFilter.java
@@ -0,0 +1,61 @@
+/**
+ * $RCSfile$
+ * $Revision$
+ * $Date$
+ *
+ * Copyright 2003-2007 Jive Software.
+ *
+ * All rights reserved. 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.filter;
+
+import org.jivesoftware.smack.packet.Packet;
+
+/**
+ * Filters for packets with a particular type of packet extension.
+ *
+ * @author Matt Tucker
+ */
+public class PacketExtensionFilter implements PacketFilter {
+
+    private String elementName;
+    private String namespace;
+
+    /**
+     * Creates a new packet extension filter. Packets will pass the filter if
+     * they have a packet extension that matches the specified element name
+     * and namespace.
+     *
+     * @param elementName the XML element name of the packet extension.
+     * @param namespace the XML namespace of the packet extension.
+     */
+    public PacketExtensionFilter(String elementName, String namespace) {
+        this.elementName = elementName;
+        this.namespace = namespace;
+    }
+
+    /**
+     * Creates a new packet extension filter. Packets will pass the filter if they have a packet
+     * extension that matches the specified namespace.
+     *
+     * @param namespace the XML namespace of the packet extension.
+     */
+    public PacketExtensionFilter(String namespace) {
+        this(null, namespace);
+    }
+
+    public boolean accept(Packet packet) {
+        return packet.getExtension(elementName, namespace) != null;
+    }
+}