diff --git a/src/main/java/net/onrc/onos/core/intent/PathIntentMap.java b/src/main/java/net/onrc/onos/core/intent/PathIntentMap.java
index 6f66cb7..ad6b1a5 100644
--- a/src/main/java/net/onrc/onos/core/intent/PathIntentMap.java
+++ b/src/main/java/net/onrc/onos/core/intent/PathIntentMap.java
@@ -13,99 +13,100 @@
  * @author Toshio Koide (t-koide@onlab.us)
  */
 public class PathIntentMap extends IntentMap {
-	private HashMap<Long, HashMap<Long, HashSet<PathIntent>>> intents;
+    private HashMap<Long, HashMap<Long, HashSet<PathIntent>>> intents;
 
-	public PathIntentMap() {
-		intents = new HashMap<>();
-	}
+    public PathIntentMap() {
+        intents = new HashMap<>();
+    }
 
-	private HashSet<PathIntent> get(SwitchPort swPort) {
-		Long dpid = swPort.getDpid();
-		Long port = swPort.getNumber();
-		HashMap<Long, HashSet<PathIntent>> portToIntents = intents.get(dpid);
-		if (portToIntents == null) {
-			portToIntents = new HashMap<>();
-			intents.put(dpid, portToIntents);
-		}
-		HashSet<PathIntent> targetIntents = portToIntents.get(port);
-		if (targetIntents == null) {
-			targetIntents = new HashSet<>();
-			portToIntents.put(port, targetIntents);
-		}
-		return targetIntents;
-	}
+    private HashSet<PathIntent> get(SwitchPort swPort) {
+        Long dpid = swPort.getDpid();
+        Long port = swPort.getNumber();
+        HashMap<Long, HashSet<PathIntent>> portToIntents = intents.get(dpid);
+        if (portToIntents == null) {
+            portToIntents = new HashMap<>();
+            intents.put(dpid, portToIntents);
+        }
+        HashSet<PathIntent> targetIntents = portToIntents.get(port);
+        if (targetIntents == null) {
+            targetIntents = new HashSet<>();
+            portToIntents.put(port, targetIntents);
+        }
+        return targetIntents;
+    }
 
-	private void put(SwitchPort swPort, PathIntent intent) {
-		get(swPort).add(intent);
-	}
+    private void put(SwitchPort swPort, PathIntent intent) {
+        get(swPort).add(intent);
+    }
 
-	@Override
-	protected void putIntent(Intent intent) {
-		if (!(intent instanceof PathIntent)) return; // TODO throw exception
-		super.putIntent(intent);
+    @Override
+    protected void putIntent(Intent intent) {
+        if (!(intent instanceof PathIntent)) return; // TODO throw exception
+        super.putIntent(intent);
 
-		PathIntent pathIntent = (PathIntent) intent;
-		for (LinkEvent linkEvent: pathIntent.getPath()) {
-			put(linkEvent.getSrc(), (PathIntent) intent);
-			put(linkEvent.getDst(), (PathIntent) intent);
-		}
-	}
+        PathIntent pathIntent = (PathIntent) intent;
+        for (LinkEvent linkEvent : pathIntent.getPath()) {
+            put(linkEvent.getSrc(), (PathIntent) intent);
+            put(linkEvent.getDst(), (PathIntent) intent);
+        }
+    }
 
-	@Override
-	protected void removeIntent(String intentId) {
-		PathIntent intent = (PathIntent) getIntent(intentId);
-		for (LinkEvent linkEvent: intent.getPath()) {
-			get(linkEvent.getSrc()).remove(intent);
-			get(linkEvent.getDst()).remove(intent);
-		}
-		super.removeIntent(intentId);
-	}
+    @Override
+    protected void removeIntent(String intentId) {
+        PathIntent intent = (PathIntent) getIntent(intentId);
+        for (LinkEvent linkEvent : intent.getPath()) {
+            get(linkEvent.getSrc()).remove(intent);
+            get(linkEvent.getDst()).remove(intent);
+        }
+        super.removeIntent(intentId);
+    }
 
-	public Collection<PathIntent> getIntentsByLink(LinkEvent linkEvent) {
-		return getIntentsByPort(
-				linkEvent.getSrc().getDpid(),
-				linkEvent.getSrc().getNumber());
-	}
+    public Collection<PathIntent> getIntentsByLink(LinkEvent linkEvent) {
+        return getIntentsByPort(
+                linkEvent.getSrc().getDpid(),
+                linkEvent.getSrc().getNumber());
+    }
 
-	public Collection<PathIntent> getIntentsByPort(Long dpid, Long port) {
-		HashMap<Long, HashSet<PathIntent>> portToIntents = intents.get(dpid);
-		if (portToIntents != null) {
-			HashSet<PathIntent> targetIntents = portToIntents.get(port);
-			if (targetIntents != null) {
-				return Collections.unmodifiableCollection(targetIntents);
-			}
-		}
-		return new HashSet<>();
-	}
+    public Collection<PathIntent> getIntentsByPort(Long dpid, Long port) {
+        HashMap<Long, HashSet<PathIntent>> portToIntents = intents.get(dpid);
+        if (portToIntents != null) {
+            HashSet<PathIntent> targetIntents = portToIntents.get(port);
+            if (targetIntents != null) {
+                return Collections.unmodifiableCollection(targetIntents);
+            }
+        }
+        return new HashSet<>();
+    }
 
-	public Collection<PathIntent> getIntentsByDpid(Long dpid) {
-		HashSet<PathIntent> result = new HashSet<>();
-		HashMap<Long, HashSet<PathIntent>> portToIntents = intents.get(dpid);
-		if (portToIntents != null) {
-			for (HashSet<PathIntent> targetIntents: portToIntents.values()) {
-				result.addAll(targetIntents);
-			}
-		}
-		return result;
-	}
+    public Collection<PathIntent> getIntentsByDpid(Long dpid) {
+        HashSet<PathIntent> result = new HashSet<>();
+        HashMap<Long, HashSet<PathIntent>> portToIntents = intents.get(dpid);
+        if (portToIntents != null) {
+            for (HashSet<PathIntent> targetIntents : portToIntents.values()) {
+                result.addAll(targetIntents);
+            }
+        }
+        return result;
+    }
 
-	/**
-	 * calculate available bandwidth of specified link
-	 * @param link
-	 * @return
-	 */
-	public Double getAvailableBandwidth(Link link) {
-		if (link == null) return null;
-		Double bandwidth = link.getCapacity();
-		LinkEvent linkEvent = new LinkEvent(link);
-		if (!bandwidth.isInfinite()) {
-			for (PathIntent intent: getIntentsByLink(linkEvent)) {
-				Double intentBandwidth = intent.getBandwidth();
-				if (intentBandwidth == null || intentBandwidth.isInfinite() || intentBandwidth.isNaN())
-					continue;
-				bandwidth -= intentBandwidth;
-			}
-		}
-		return bandwidth;
-	}
+    /**
+     * calculate available bandwidth of specified link
+     *
+     * @param link
+     * @return
+     */
+    public Double getAvailableBandwidth(Link link) {
+        if (link == null) return null;
+        Double bandwidth = link.getCapacity();
+        LinkEvent linkEvent = new LinkEvent(link);
+        if (!bandwidth.isInfinite()) {
+            for (PathIntent intent : getIntentsByLink(linkEvent)) {
+                Double intentBandwidth = intent.getBandwidth();
+                if (intentBandwidth == null || intentBandwidth.isInfinite() || intentBandwidth.isNaN())
+                    continue;
+                bandwidth -= intentBandwidth;
+            }
+        }
+        return bandwidth;
+    }
 }