First draft of SelfContained Object for Event

Change-Id: Ib590f60d54343376022f36541127d3a475c4f8e1
diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/PortEvent.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/PortEvent.java
new file mode 100644
index 0000000..f51ee58
--- /dev/null
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/PortEvent.java
@@ -0,0 +1,55 @@
+package net.onrc.onos.ofcontroller.networkgraph;
+
+/**
+ * Self-contained Port object for event
+ *
+ * TODO: We probably want common base class/interface for Self-Contained Event Object
+ *
+ */
+public class PortEvent {
+    public static class SwitchPort {
+        public final Long dpid;
+        public final Long number;
+
+        public SwitchPort(Long dpid, Long number) {
+            this.dpid = dpid;
+            this.number = number;
+        }
+
+        public Long getDpid() {
+            return dpid;
+        }
+
+        public Long getNumber() {
+            return number;
+        }
+
+        @Override
+        public String toString() {
+            return "(" + Long.toHexString(dpid) + "@" + number + ")";
+        }
+
+    }
+
+    private final SwitchPort id;
+    // TODO Add Hardware Address
+    // TODO Add Description
+
+    public PortEvent(Long dpid, Long number) {
+	this.id = new SwitchPort(dpid, number);
+    }
+
+    public Long getDpid() {
+	return id.dpid;
+    }
+
+    public Long getNumber() {
+	return id.number;
+    }
+
+    @Override
+    public String toString() {
+	return "[PortEvent 0x" + Long.toHexString(id.dpid) + "@" + id.number + "]";
+    }
+
+}