1 files changed, 85 insertions, 0 deletions
diff --git a/framework/src/onos/incubator/net/src/main/java/org/onosproject/incubator/net/mcast/impl/MulticastData.java b/framework/src/onos/incubator/net/src/main/java/org/onosproject/incubator/net/mcast/impl/MulticastData.java
new file mode 100644
index 00000000..946d8c6e
--- /dev/null
+++ b/framework/src/onos/incubator/net/src/main/java/org/onosproject/incubator/net/mcast/impl/MulticastData.java
@@ -0,0 +1,85 @@
+/*
+ * 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.incubator.net.mcast.impl;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Lists;
+import org.onosproject.net.ConnectPoint;
+
+import java.util.Collections;
+import java.util.List;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Simple entity maintaining a mapping between a source and a collection of sink
+ * connect points.
+ */
+public final class MulticastData {
+
+    private final ConnectPoint source;
+    private final List<ConnectPoint> sinks;
+    private final boolean isEmpty;
+
+    private MulticastData() {
+        this.source = null;
+        this.sinks = Collections.EMPTY_LIST;
+        isEmpty = true;
+    }
+
+    public MulticastData(ConnectPoint source, List<ConnectPoint> sinks) {
+        this.source = checkNotNull(source, "Multicast source cannot be null.");
+        this.sinks = checkNotNull(sinks, "List of sinks cannot be null.");
+        isEmpty = false;
+    }
+
+    public MulticastData(ConnectPoint source, ConnectPoint sink) {
+        this.source = checkNotNull(source, "Multicast source cannot be null.");
+        this.sinks = Lists.newArrayList(checkNotNull(sink, "Sink cannot be null."));
+        isEmpty = false;
+    }
+
+    public MulticastData(ConnectPoint source) {
+        this.source = checkNotNull(source, "Multicast source cannot be null.");
+        this.sinks = Lists.newArrayList();
+        isEmpty = false;
+    }
+
+    public ConnectPoint source() {
+        return source;
+    }
+
+    public List<ConnectPoint> sinks() {
+        return ImmutableList.copyOf(sinks);
+    }
+
+    public void appendSink(ConnectPoint sink) {
+        sinks.add(sink);
+    }
+
+    public boolean removeSink(ConnectPoint sink) {
+        return sinks.remove(sink);
+    }
+
+    public boolean isEmpty() {
+        return isEmpty;
+    }
+
+    public static MulticastData empty() {
+        return new MulticastData();
+    }
+
+}