Move ID byte[] generation code to Event object

Change-Id: Iaf8812d8fa8d99f085dd4d4217a8ab6454608c2a
diff --git a/src/main/java/net/onrc/onos/datastore/topology/RCDevice.java b/src/main/java/net/onrc/onos/datastore/topology/RCDevice.java
index a431490..8d696ed 100644
--- a/src/main/java/net/onrc/onos/datastore/topology/RCDevice.java
+++ b/src/main/java/net/onrc/onos/datastore/topology/RCDevice.java
@@ -21,6 +21,7 @@
 import net.onrc.onos.datastore.topology.RCLink.STATUS;
 import net.onrc.onos.datastore.utils.ByteArrayComparator;
 import net.onrc.onos.datastore.utils.ByteArrayUtil;
+import net.onrc.onos.ofcontroller.networkgraph.DeviceEvent;
 
 public class RCDevice extends RCObject {
     @SuppressWarnings("unused")
@@ -53,8 +54,7 @@
 
     // Assuming mac is unique cluster-wide
     public static byte[] getDeviceID(final byte[] mac) {
-	return ByteBuffer.allocate(2 + mac.length).putChar('D').put(mac)
-	        .array();
+        return DeviceEvent.getDeviceID(mac);
     }
 
     public static StringBuilder keysToSB(Collection<byte[]> keys) {
diff --git a/src/main/java/net/onrc/onos/datastore/topology/RCLink.java b/src/main/java/net/onrc/onos/datastore/topology/RCLink.java
index caf446d..9ce8857 100644
--- a/src/main/java/net/onrc/onos/datastore/topology/RCLink.java
+++ b/src/main/java/net/onrc/onos/datastore/topology/RCLink.java
@@ -15,6 +15,8 @@
 import edu.stanford.ramcloud.JRamCloud;
 import net.onrc.onos.datastore.RCObject;
 import net.onrc.onos.datastore.RCTable;
+import net.onrc.onos.ofcontroller.networkgraph.LinkEvent;
+import net.onrc.onos.ofcontroller.networkgraph.PortEvent;
 
 public class RCLink extends RCObject {
     @SuppressWarnings("unused")
@@ -77,13 +79,10 @@
     private final SwitchPort dst;
     private STATUS status;
 
-    public static final int LINKID_BYTES = 2 + RCPort.PORTID_BYTES * 2;
-
     public static byte[] getLinkID(Long src_dpid, Long src_port_no,
 	    Long dst_dpid, Long dst_port_no) {
-	return ByteBuffer.allocate(LINKID_BYTES).putChar('L')
-	        .put(RCPort.getPortID(src_dpid, src_port_no))
-	        .put(RCPort.getPortID(dst_dpid, dst_port_no)).array();
+	return LinkEvent.getLinkID(src_dpid, src_port_no, dst_dpid,
+		dst_port_no);
     }
 
     public static StringBuilder keysToSB(Collection<byte[]> keys) {
@@ -118,7 +117,7 @@
 	    throw new IllegalArgumentException("Invalid Link key");
 	}
 	long src_port_pair[] = RCPort.getPortPairFromKey(keyBuf.slice());
-	keyBuf.position(2 + RCPort.PORTID_BYTES);
+	keyBuf.position(2 + PortEvent.PORTID_BYTES);
 	long dst_port_pair[] = RCPort.getPortPairFromKey(keyBuf.slice());
 
 	tuple[0] = src_port_pair[0];
diff --git a/src/main/java/net/onrc/onos/datastore/topology/RCPort.java b/src/main/java/net/onrc/onos/datastore/topology/RCPort.java
index b1f3bef..c3cdf86 100644
--- a/src/main/java/net/onrc/onos/datastore/topology/RCPort.java
+++ b/src/main/java/net/onrc/onos/datastore/topology/RCPort.java
@@ -21,6 +21,7 @@
 import net.onrc.onos.datastore.RCTable;
 import net.onrc.onos.datastore.utils.ByteArrayComparator;
 import net.onrc.onos.datastore.utils.ByteArrayUtil;
+import net.onrc.onos.ofcontroller.networkgraph.PortEvent;
 
 public class RCPort extends RCObject {
     private static final Logger log = LoggerFactory.getLogger(RCPort.class);
@@ -69,17 +70,8 @@
     @Deprecated
     transient boolean isDeviceIdsModified;
 
-    public static final int PORTID_BYTES = RCSwitch.SWITCHID_BYTES + 2 + 8;
-
     public static byte[] getPortID(Long dpid, Long number) {
-	if (dpid == null) {
-	    throw new IllegalArgumentException("dpid cannot be null");
-	}
-	if (number == null) {
-	    throw new IllegalArgumentException("number cannot be null");
-	}
-	return ByteBuffer.allocate(PORTID_BYTES).putChar('S').putLong(dpid)
-	        .putChar('P').putLong(number).array();
+        return PortEvent.getPortID(dpid, number);
     }
 
     public static StringBuilder keysToSB(Collection<byte[]> keys) {
diff --git a/src/main/java/net/onrc/onos/datastore/topology/RCSwitch.java b/src/main/java/net/onrc/onos/datastore/topology/RCSwitch.java
index 3b00084..a0dd037 100644
--- a/src/main/java/net/onrc/onos/datastore/topology/RCSwitch.java
+++ b/src/main/java/net/onrc/onos/datastore/topology/RCSwitch.java
@@ -14,6 +14,7 @@
 import net.onrc.onos.datastore.RCObject;
 import net.onrc.onos.datastore.RCTable;
 import net.onrc.onos.datastore.utils.ByteArrayComparator;
+import net.onrc.onos.ofcontroller.networkgraph.SwitchEvent;
 
 import org.openflow.util.HexString;
 import org.slf4j.Logger;
@@ -70,14 +71,8 @@
     @Deprecated
     transient private boolean isPortIdsModified;
 
-    public static final int SWITCHID_BYTES = 2 + 8;
-
     public static byte[] getSwitchID(Long dpid) {
-	if (dpid == null) {
-	    throw new IllegalArgumentException("dpid cannot be null");
-	}
-	return ByteBuffer.allocate(SWITCHID_BYTES).putChar('S').putLong(dpid)
-	        .array();
+        return SwitchEvent.getSwitchID(dpid);
     }
 
     public static StringBuilder keysToSB(Collection<byte[]> keys) {