Add Intent class and its extended classes

- Intent class is an abstract class for the intents
- ShortestPathIntent class extends Intent class that expresses shortest hop between source-destination pair
- ConstrainedShortestPathIntent class extends ShortestPathIntent class that expresses bandwidth as an additional intention to ShortestPathIntent
- PathIntent class extends Intent class that expresses path

Change-Id: Ia5e8ddb55b333841d9eb438f9eb28866f6e3e300
diff --git a/src/main/java/net/onrc/onos/intent/ShortestPathIntent.java b/src/main/java/net/onrc/onos/intent/ShortestPathIntent.java
new file mode 100644
index 0000000..e7f1a13
--- /dev/null
+++ b/src/main/java/net/onrc/onos/intent/ShortestPathIntent.java
@@ -0,0 +1,56 @@
+package net.onrc.onos.intent;
+
+import net.floodlightcontroller.util.MACAddress;
+import net.onrc.onos.ofcontroller.networkgraph.NetworkGraph;
+import net.onrc.onos.ofcontroller.networkgraph.Port;
+
+/**
+ * @author Toshio Koide (t-koide@onlab.us)
+ */
+public class ShortestPathIntent extends Intent {
+	protected Port srcPort = null;
+	protected Port dstPort = null;
+	protected MACAddress srcMac = null;
+	protected MACAddress dstMac = null;
+
+	public ShortestPathIntent(
+			Port srcPort, MACAddress srcMac,
+			Port dstPort, MACAddress dstMac) {
+		this.srcPort = srcPort;
+		this.dstPort = dstPort;
+		this.srcMac = srcMac;
+		this.dstMac = dstMac;
+	}
+
+	public ShortestPathIntent(NetworkGraph graph,
+			Long srcSwitch, Long srcPort, long srcMac,
+			Long dstSwitch, Long dstPort, long dstMac) {
+		this.srcPort = graph.getSwitch(srcSwitch).getPort(srcPort);
+		this.dstPort = graph.getSwitch(dstSwitch).getPort(srcPort);
+		this.srcMac = MACAddress.valueOf(srcMac);
+		this.dstMac = MACAddress.valueOf(dstMac);
+	}
+
+	public Port getSourcePort() {
+		return srcPort;
+	}
+
+	public MACAddress getSourceMac() {
+		return srcMac;
+	}
+
+	public Port getDestinationPort() {
+		return dstPort;
+	}
+
+	public MACAddress getDestinationMac() {
+		return dstMac;
+	}
+
+	@Override
+	public String toString() {
+		return String.format("srcPort:%s, srcMac:%s, dstPort:%s, dstMac:%s",
+				srcPort.toString(), srcMac.toString(),
+				dstPort.toString(), dstMac.toString());
+	}
+}