Internal refactoring

Author: garydgregory

src/main/java/org/apache/commons/io/input/ReadAheadInputStream.java

@@ -102,8 +102,7 @@ public Builder() {
          */
         @Override
         public ReadAheadInputStream get() throws IOException {
-            return new ReadAheadInputStream(getInputStream(), getBufferSize(), executorService != null ? executorService : newExecutorService(),
-                    executorService == null);
+            return new ReadAheadInputStream(this);
         }
 
         /**
@@ -196,6 +195,12 @@ private static ExecutorService newExecutorService() {
 
     private final Condition asyncReadComplete = stateChangeLock.newCondition();
 
+    @SuppressWarnings("resource")
+    private ReadAheadInputStream(final Builder builder) throws IOException {
+        this(builder.getInputStream(), builder.getBufferSize(), builder.executorService != null ? builder.executorService : newExecutorService(),
+                builder.executorService == null);
+    }
+
     /**
      * Constructs an instance with the specified buffer size and read-ahead threshold
      *