Introduce ToMatchesFilter

and refactor the FromMatchesFilter into AbstractFromToMatchesFilter.

smack-core/src/main/java/org/jivesoftware/smack/filter/AbstractFromToMatchesFilter.java

@@ -0,0 +1,70 @@
+/**
+ *
+ * Copyright 2017 Florian Schmaus.
+ *
+ * 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.Stanza;
+import org.jxmpp.jid.Jid;
+
+public abstract class AbstractFromToMatchesFilter implements StanzaFilter {
+
+    private final Jid address;
+
+    /**
+     * Flag that indicates if the checking will be done against bare JID addresses or full JIDs.
+     */
+    private final boolean ignoreResourcepart;
+
+    /**
+     * Creates a filter matching on the address returned by {@link #getAddressToCompare(Stanza)}. The address must be
+     * the same as the filter address. The second parameter specifies whether the full or the bare addresses are
+     * compared.
+     *
+     * @param address The address to filter for. If <code>null</code> is given, then
+     *        {@link #getAddressToCompare(Stanza)} must also return <code>null</code> to match.
+     * @param ignoreResourcepart
+     */
+    protected AbstractFromToMatchesFilter(Jid address, boolean ignoreResourcepart) {
+        if (address != null && ignoreResourcepart) {
+            this.address = address.asBareJid();
+        }
+        else {
+            this.address = address;
+        }
+        this.ignoreResourcepart = ignoreResourcepart;
+    }
+
+    public final boolean accept(final Stanza stanza) {
+        Jid stanzaAddress = getAddressToCompare(stanza);
+
+        if (stanzaAddress == null) {
+            return address == null;
+        }
+
+        if (ignoreResourcepart) {
+            stanzaAddress = stanzaAddress.asBareJid();
+        }
+
+        return stanzaAddress.equals(address);
+    }
+
+    protected abstract Jid getAddressToCompare(Stanza stanza);
+
+    public final String toString() {
+        String matchMode = ignoreResourcepart ? "ignoreResourcepart" : "full";
+        return getClass().getSimpleName() + " (" + matchMode + "): " + address;
+    }
+}

smack-core/src/main/java/org/jivesoftware/smack/filter/FromMatchesFilter.java

@@ -1,6 +1,6 @@
 /**
  *
- * Copyright 2003-2014 Jive Software.
+ * Copyright 2003-2014 Jive Software, 2017 Florian Schmaus.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -14,7 +14,6 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-
 package org.jivesoftware.smack.filter;
 
 import org.jivesoftware.smack.packet.Stanza;
@@ -28,14 +27,9 @@ import org.jxmpp.jid.Jid;
  *
  * @author Gaston Dombiak
  */
-public class FromMatchesFilter implements StanzaFilter {
+public final class FromMatchesFilter extends AbstractFromToMatchesFilter {
 
-    private final Jid address;
+    public final static FromMatchesFilter MATCH_NO_FROM_SET = create(null);
-
-    /**
-     * Flag that indicates if the checking will be done against bare JID addresses or full JIDs.
-     */
-    private final boolean ignoreResourcepart;
 
     /**
      * Creates a filter matching on the "from" field. The from address must be the same as the
@@ -47,13 +41,7 @@ public class FromMatchesFilter implements StanzaFilter {
      * @param ignoreResourcepart
      */
     public FromMatchesFilter(Jid address, boolean ignoreResourcepart) {
-        if (address != null && ignoreResourcepart) {
+        super(address, ignoreResourcepart);
-            this.address = address.asBareJid();
-        }
-        else {
-            this.address = address;
-        }
-        this.ignoreResourcepart = ignoreResourcepart;
     }
 
     /**
@@ -61,50 +49,38 @@ public class FromMatchesFilter implements StanzaFilter {
      * the filter address with the bare from address. Otherwise, compares the filter address
      * with the full from address.
      *
-     * @param address The address to filter for. If <code>null</code> is given, the stanza(/packet) must not
+     * @param address The address to filter for. If <code>null</code> is given, the stanza must not
      *        have a from address.
      */
     public static FromMatchesFilter create(Jid address) {
-        return new FromMatchesFilter(address, address.hasNoResource()) ;
+        return new FromMatchesFilter(address, address != null ? address.hasNoResource() : false) ;
     }
 
     /**
      * Creates a filter matching on the "from" field. Compares the bare version of from and filter
      * address.
      *
-     * @param address The address to filter for. If <code>null</code> is given, the stanza(/packet) must not
+     * @param address The address to filter for. If <code>null</code> is given, the stanza must not
      *        have a from address.
      */
     public static FromMatchesFilter createBare(Jid address) {
         return new FromMatchesFilter(address, true);
     }
 
-
     /**
-     * Creates a filter matching on the "from" field. Compares the full version of from and filter
+     * Creates a filter matching on the "from" field. Compares the full version, if available, of from and filter
      * address.
      *
-     * @param address The address to filter for. If <code>null</code> is given, the stanza(/packet) must not
+     * @param address The address to filter for. If <code>null</code> is given, the stanza must not
      *        have a from address.
      */
     public static FromMatchesFilter createFull(Jid address) {
         return new FromMatchesFilter(address, false);
     }
 
-    public boolean accept(Stanza packet) {
+    @Override
-        Jid from = packet.getFrom();
+    protected Jid getAddressToCompare(Stanza stanza) {
-        if (from == null) {
+        return stanza.getFrom();
-            return address == null;
     }
 
-        if (ignoreResourcepart) {
-            from = from.asBareJid();
-        }
-        return from.equals(address);
-    }
-
-    public String toString() {
-        String matchMode = ignoreResourcepart ? "ignoreResourcepart" : "full";
-        return getClass().getSimpleName() + " (" + matchMode + "): " + address;
-    }
 }

smack-core/src/main/java/org/jivesoftware/smack/filter/ToFilter.java

@@ -19,6 +19,12 @@ package org.jivesoftware.smack.filter;
 import org.jivesoftware.smack.packet.Stanza;
 import org.jxmpp.jid.Jid;
 
+/**
+ * Match based on the 'to' attribute of a Stanza.
+ *
+ * @deprecated use {@link ToMatchesFilter} instead.
+ */
+@Deprecated
 public class ToFilter implements StanzaFilter {
 
     private final Jid to;

smack-core/src/main/java/org/jivesoftware/smack/filter/ToMatchesFilter.java

@@ -0,0 +1,69 @@
+/**
+ *
+ * Copyright 2017 Florian Schmaus.
+ *
+ * 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.Stanza;
+import org.jxmpp.jid.Jid;
+
+public final class ToMatchesFilter extends AbstractFromToMatchesFilter {
+
+    public static final ToMatchesFilter MATCH_NO_TO_SET = create(null);
+
+    public ToMatchesFilter(Jid address, boolean ignoreResourcepart) {
+        super(address, ignoreResourcepart);
+    }
+
+    /**
+     * Creates a filter matching on the "to" field. If the filter address is bare, compares
+     * the filter address with the bare from address. Otherwise, compares the filter address
+     * with the full from address.
+     *
+     * @param address The address to filter for. If <code>null</code> is given, the stanza must not
+     *        have a from address.
+     */
+    public static ToMatchesFilter create(Jid address) {
+        return new ToMatchesFilter(address, address != null ? address.hasNoResource() : false) ;
+    }
+
+    /**
+     * Creates a filter matching on the "to" field. Compares the bare version of to and filter
+     * address.
+     *
+     * @param address The address to filter for. If <code>null</code> is given, the stanza must not
+     *        have a from address.
+     */
+    public static ToMatchesFilter createBare(Jid address) {
+        return new ToMatchesFilter(address, true);
+    }
+
+    /**
+     * Creates a filter matching on the "to" field. Compares the full version, if available, of to and filter
+     * address.
+     *
+     * @param address The address to filter for. If <code>null</code> is given, the stanza must not
+     *        have a from address.
+     */
+    public static ToMatchesFilter createFull(Jid address) {
+        return new ToMatchesFilter(address, false);
+    }
+
+    @Override
+    protected Jid getAddressToCompare(Stanza stanza) {
+        return stanza.getTo();
+    }
+
+}

smack-extensions/src/main/java/org/jivesoftware/smackx/muc/MultiUserChat.java

@@ -46,7 +46,7 @@ import org.jivesoftware.smack.filter.NotFilter;
 import org.jivesoftware.smack.filter.StanzaFilter;
 import org.jivesoftware.smack.filter.StanzaExtensionFilter;
 import org.jivesoftware.smack.filter.StanzaTypeFilter;
-import org.jivesoftware.smack.filter.ToFilter;
+import org.jivesoftware.smack.filter.ToMatchesFilter;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.packet.Message;
 import org.jivesoftware.smack.packet.Stanza;
@@ -319,7 +319,7 @@ public class MultiUserChat {
         connection.addSyncStanzaListener(subjectListener, new AndFilter(fromRoomFilter,
                         MessageWithSubjectFilter.INSTANCE, new NotFilter(MessageTypeFilter.ERROR)));
         connection.addSyncStanzaListener(declinesListener, DECLINE_FILTER);
-        connection.addPacketInterceptor(presenceInterceptor, new AndFilter(new ToFilter(room),
+        connection.addPacketInterceptor(presenceInterceptor, new AndFilter(ToMatchesFilter.create(room),
                         StanzaTypeFilter.PRESENCE));
         messageCollector = connection.createStanzaCollector(fromRoomGroupchatFilter);