[ONOS-3172] Add arp_spa or arp_tpa Criteria to onos

Change-Id: I3eef59b71ba062ecb475f16decc7a6a0cd59032f

+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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.onosproject.net.flow.criteria;
+
+import static com.google.common.base.MoreObjects.toStringHelper;
+
+import java.util.Objects;
+
+import org.onlab.packet.Ip4Address;
+
+/**
+ * Implementation of arp spa or tpa address criterion.
+ */
+public final class ArpPaCriterion implements Criterion {
+    private final Ip4Address ip;
+    private final Type type;
+
+    /**
+     * Constructor.
+     *
+     * @param ip the Ip4 Address to match.
+     * @param type the match type. Should be one of the following:
+     * Type.ARP_SPA, Type.ARP_TPA
+     */
+    ArpPaCriterion(Ip4Address ip, Type type) {
+        this.ip = ip;
+        this.type = type;
+    }
+
+    @Override
+    public Type type() {
+        return this.type;
+    }
+
+    /**
+     * Gets the Ip4 Address to match.
+     *
+     * @return the Ip4 Address to match
+     */
+    public Ip4Address ip() {
+        return this.ip;
+    }
+
+    @Override
+    public String toString() {
+        return toStringHelper(type().toString())
+                .add("ip", ip).toString();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(type().ordinal(), ip);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof ArpPaCriterion) {
+            ArpPaCriterion that = (ArpPaCriterion) obj;
+            return Objects.equals(ip, that.ip) &&
+                    Objects.equals(type, that.type);
+        }
+        return false;
+    }
+}
\ No newline at end of file

@@ -16,6 +16,7 @@
 package org.onosproject.net.flow.criteria;
 
 import org.onlab.packet.EthType;
+import org.onlab.packet.Ip4Address;
 import org.onlab.packet.Ip6Address;
 import org.onlab.packet.IpPrefix;
 import org.onlab.packet.MacAddress;
@@ -25,11 +26,11 @@ import org.onlab.packet.VlanId;
 import org.onosproject.net.IndexedLambda;
 import org.onosproject.net.Lambda;
 import org.onosproject.net.OchSignal;
+import org.onosproject.net.OchSignalType;
 import org.onosproject.net.OduSignalId;
 import org.onosproject.net.OduSignalType;
 import org.onosproject.net.PortNumber;
 import org.onosproject.net.flow.criteria.Criterion.Type;
-import org.onosproject.net.OchSignalType;
 
 /**
  * Factory class to create various traffic selection criteria.
@@ -508,6 +509,16 @@ public final class Criteria {
         return new OduSignalTypeCriterion(signalType);
     }
 
+    /**
+     * Creates a match on IPv4 source field using the specified value.
+     *
+     * @param ip ipv4 source value
+     * @return match criterion
+     */
+    public static Criterion matchArpTpa(Ip4Address ip) {
+        return new ArpPaCriterion(ip, Type.ARP_TPA);
+    }
+
     public static Criterion dummy() {
         return new DummyCriterion();
     }