Initial version. SMACK-71

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@2521 b35dd754-fafc-0310-a699-88a17e54d16e

source/org/jivesoftware/smack/filter/FromMatchesFilter.java

@@ -0,0 +1,71 @@
+/**
+ * $RCSfile$
+ * $Revision$
+ * $Date$
+ *
+ * Copyright 2003-2004 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;
+import org.jivesoftware.smack.util.StringUtils;
+
+/**
+ * Filter for packets where the "from" field exactly matches a specified JID. If the specified
+ * address is a bare JID then the filter will match any address whose bare JID matches the
+ * specified JID. But if the specified address is a full JID then the filter will only match
+ * if the sender of the packet matches the specified resource.
+ *
+ * @author Gaston Dombiak
+ */
+public class FromMatchesFilter implements PacketFilter {
+
+    private String address;
+    /**
+     * Flag that indicates if the checking will be done against bare JID addresses or full JIDs.
+     */
+    private boolean matchBareJID = false;
+
+    /**
+     * Creates a "from" filter using the "from" field part. If the specified address is a bare JID
+     * then the filter will match any address whose bare JID matches the specified JID. But if the
+     * specified address is a full JID then the filter will only match if the sender of the packet
+     * matches the specified resource.
+     *
+     * @param address the from field value the packet must match. Could be a full or bare JID.
+     */
+    public FromMatchesFilter(String address) {
+        if (address == null) {
+            throw new IllegalArgumentException("Parameter cannot be null.");
+        }
+        this.address = address.toLowerCase();
+        matchBareJID = "".equals(StringUtils.parseResource(address));
+    }
+
+    public boolean accept(Packet packet) {
+        if (packet.getFrom() == null) {
+            return false;
+        }
+        else if (matchBareJID) {
+            // Check if the bare JID of the sender of the packet matches the specified JID
+            return packet.getFrom().toLowerCase().startsWith(address);
+        }
+        else {
+            // Check if the full JID of the sender of the packet matches the specified JID
+            return address.equals(packet.getFrom().toLowerCase());
+        }
+    }
+}