From e07e7868ece6aa3b9111253a8372c0e3064f64cd Mon Sep 17 00:00:00 2001
From: Martin Thompson <mjpt777@gmail.com>
Date: Thu, 2 Mar 2017 11:27:34 +0000
Subject: [PATCH] [Java] Simplify SubscriptionLink.isLinked() method.

---
 .../src/main/java/io/aeron/driver/SubscriptionLink.java         | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/aeron-driver/src/main/java/io/aeron/driver/SubscriptionLink.java b/aeron-driver/src/main/java/io/aeron/driver/SubscriptionLink.java
index c261dbc2a2..a2da87c069 100644
--- a/aeron-driver/src/main/java/io/aeron/driver/SubscriptionLink.java
+++ b/aeron-driver/src/main/java/io/aeron/driver/SubscriptionLink.java
@@ -92,7 +92,7 @@ public boolean matches(final int streamId)
 
     public boolean isLinked(final Subscribable subscribable)
     {
-        return null != positionBySubscribableMap.get(subscribable);
+        return positionBySubscribableMap.containsKey(subscribable);
     }
 
     public void link(final Subscribable subscribable, final ReadablePosition position)