Built REST APIs to look at the in-memory network graph state.
Amended to clean up serializer code.

Change-Id: Ie020d1173fa108eec12e324e3ae37353c7ca8a00
diff --git a/src/main/java/net/onrc/onos/ofcontroller/networkgraph/serializers/SwitchSerializer.java b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/serializers/SwitchSerializer.java
new file mode 100644
index 0000000..774377d
--- /dev/null
+++ b/src/main/java/net/onrc/onos/ofcontroller/networkgraph/serializers/SwitchSerializer.java
@@ -0,0 +1,36 @@
+package net.onrc.onos.ofcontroller.networkgraph.serializers;
+
+import java.io.IOException;
+
+import net.onrc.onos.ofcontroller.networkgraph.Port;
+import net.onrc.onos.ofcontroller.networkgraph.Switch;
+
+import org.codehaus.jackson.JsonGenerator;
+import org.codehaus.jackson.JsonProcessingException;
+import org.codehaus.jackson.map.SerializerProvider;
+import org.codehaus.jackson.map.ser.std.SerializerBase;
+import org.openflow.util.HexString;
+
+public class SwitchSerializer extends SerializerBase<Switch> {
+
+	public SwitchSerializer() {
+		super(Switch.class);
+	}
+
+	@Override
+	public void serialize(Switch sw, JsonGenerator jsonGenerator,
+			SerializerProvider serializerProvider) throws IOException,
+			JsonProcessingException {
+		
+		jsonGenerator.writeStartObject();
+		jsonGenerator.writeStringField("dpid", HexString.toHexString(sw.getDpid()));
+		jsonGenerator.writeStringField("state", "ACTIVE");
+		jsonGenerator.writeArrayFieldStart("ports");
+		for (Port port : sw.getPorts()) {
+			jsonGenerator.writeObject(port);
+		}
+		jsonGenerator.writeEndArray();
+		jsonGenerator.writeEndObject();
+	}
+
+}