removed unused imports

moved json property declaration to variable decalartion

src/main/java/net/floodlightcontroller/routing/Link.java

@@ -17,17 +17,17 @@
 
 package net.floodlightcontroller.routing;
 
-import net.floodlightcontroller.core.web.serializers.DPIDSerializer;
-import net.floodlightcontroller.core.web.serializers.UShortSerializer;
-
 import com.fasterxml.jackson.annotation.JsonProperty;
-import com.fasterxml.jackson.databind.annotation.JsonSerialize;
 import org.openflow.util.HexString;
 
 public class Link implements Comparable<Link> {
+    @JsonProperty("src-switch")
     private long src;
+    @JsonProperty("src-port")
     private short srcPort;
+    @JsonProperty("dst-switch")
     private long dst;
+    @JsonProperty("dst-port")
     private short dstPort;
 
 
@@ -46,30 +46,26 @@ public class Link implements Comparable<Link> {
         this.dstPort = (short) dstPort;
     }
 
+    /*
+     * Do not use this constructor. Used primarily for JSON
+     * Serialization/Deserialization
+     */
     public Link() {
         super();
     }
 
-    @JsonProperty("src-switch")
-    // @JsonSerialize(using=DPIDSerializer.class)
     public long getSrc() {
         return src;
     }
 
-    @JsonProperty("src-port")
-    // @JsonSerialize(using=UShortSerializer.class)
     public short getSrcPort() {
         return srcPort;
     }
 
-    @JsonProperty("dst-switch")
-    // @JsonSerialize(using=DPIDSerializer.class)
     public long getDst() {
         return dst;
     }
 
-    @JsonProperty("dst-port")
-    // @JsonSerialize(using=UShortSerializer.class)
     public short getDstPort() {
         return dstPort;
     }