Cleanup PathArgumentTypes

[controller.git] / opendaylight / md-sal / sal-clustering-commons / src / main / java / org / opendaylight / controller / cluster / datastore / node / utils / stream / PathArgumentTypes.java

diff --git a/opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/datastore/node/utils/stream/PathArgumentTypes.java b/opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/datastore/node/utils/stream/PathArgumentTypes.java
index b01beb8c779b5b80907a0afcf51cc04f58c54d60..07ed12ab52e686cadc8ed27bc1576da8e012cf5a 100644 (file)
--- a/opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/datastore/node/utils/stream/PathArgumentTypes.java
+++ b/opendaylight/md-sal/sal-clustering-commons/src/main/java/org/opendaylight/controller/cluster/datastore/node/utils/stream/PathArgumentTypes.java
@@ -5,35 +5,37 @@
  * terms of the Eclipse Public License v1.0 which accompanies this distribution,
  * and is available at http://www.eclipse.org/legal/epl-v10.html
  */
-
 package org.opendaylight.controller.cluster.datastore.node.utils.stream;
 
-import com.google.common.collect.ImmutableMap;
-import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import static com.google.common.base.Preconditions.checkArgument;
 
+import com.google.common.collect.ImmutableMap;
 import java.util.Map;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifierWithPredicates;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeWithValue;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
+
+final class PathArgumentTypes {
+    static final byte AUGMENTATION_IDENTIFIER = 1;
+    static final byte NODE_IDENTIFIER = 2;
+    static final byte NODE_IDENTIFIER_WITH_VALUE = 3;
+    static final byte NODE_IDENTIFIER_WITH_PREDICATES = 4;
+
+    private PathArgumentTypes() {
+        throw new UnsupportedOperationException("Utility class");
+    }
 
-public class PathArgumentTypes {
-    public static final byte AUGMENTATION_IDENTIFIER = 1;
-    public static final byte NODE_IDENTIFIER = 2;
-    public static final byte NODE_IDENTIFIER_WITH_VALUE = 3;
-    public static final byte NODE_IDENTIFIER_WITH_PREDICATES = 4;
-
-    private static Map<Class<?>, Byte> CLASS_TO_ENUM_MAP =
-            ImmutableMap.<Class<?>, Byte>builder().
-                put(YangInstanceIdentifier.AugmentationIdentifier.class, AUGMENTATION_IDENTIFIER).
-                put(YangInstanceIdentifier.NodeIdentifier.class, NODE_IDENTIFIER).
-                put(YangInstanceIdentifier.NodeIdentifierWithPredicates.class, NODE_IDENTIFIER_WITH_PREDICATES).
-                put(YangInstanceIdentifier.NodeWithValue.class, NODE_IDENTIFIER_WITH_VALUE).build();
-
-    public static byte getSerializablePathArgumentType(YangInstanceIdentifier.PathArgument pathArgument){
-
-        Byte type = CLASS_TO_ENUM_MAP.get(pathArgument.getClass());
-        if(type == null) {
-            throw new IllegalArgumentException("Unknown type of PathArgument = " + pathArgument);
-        }
+    private static final Map<Class<?>, Byte> CLASS_TO_ENUM_MAP = ImmutableMap.<Class<?>, Byte>builder()
+            .put(AugmentationIdentifier.class, AUGMENTATION_IDENTIFIER)
+            .put(NodeIdentifier.class, NODE_IDENTIFIER)
+            .put(NodeIdentifierWithPredicates.class, NODE_IDENTIFIER_WITH_PREDICATES)
+            .put(NodeWithValue.class, NODE_IDENTIFIER_WITH_VALUE).build();
 
+    static byte getSerializablePathArgumentType(final PathArgument pathArgument) {
+        final Byte type = CLASS_TO_ENUM_MAP.get(pathArgument.getClass());
+        checkArgument(type != null, "Unknown type of PathArgument = %s", pathArgument);
         return type;
     }
-
 }