Initial opendaylight infrastructure commit!!

[controller.git] / opendaylight / sal / yang-prototype / sal / sal-broker-impl / src / main / java / org / opendaylight / controller / sal / core / impl / Utils.java

diff --git a/opendaylight/sal/yang-prototype/sal/sal-broker-impl/src/main/java/org/opendaylight/controller/sal/core/impl/Utils.java b/opendaylight/sal/yang-prototype/sal/sal-broker-impl/src/main/java/org/opendaylight/controller/sal/core/impl/Utils.java
new file mode 100644 (file)
index 0000000..810049f
--- /dev/null
+++ b/opendaylight/sal/yang-prototype/sal/sal-broker-impl/src/main/java/org/opendaylight/controller/sal/core/impl/Utils.java
@@ -0,0 +1,40 @@
+/*\r
+ * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.\r
+ *\r
+ * This program and the accompanying materials are made available under the\r
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,\r
+ * and is available at http://www.eclipse.org/legal/epl-v10.html\r
+ */\r
+package org.opendaylight.controller.sal.core.impl;\r
+\r
+import java.util.ArrayList;\r
+import java.util.List;\r
+import java.util.Map;\r
+\r
+import org.opendaylight.controller.yang.common.QName;\r
+\r
+\r
+public class Utils {\r
+\r
+    public static <T> void addToMap(Map<QName, List<T>> map, QName key, T value) {\r
+        List<T> list = map.get(key);\r
+        if (list == null) {\r
+            list = new ArrayList<T>();\r
+            map.put(key, list);\r
+        }\r
+        list.add(value);\r
+    }\r
+\r
+    public static <T> void removeFromMap(Map<QName, List<T>> map, QName key,\r
+            T value) {\r
+        List<T> list = map.get(key);\r
+        if (list == null) {\r
+            return;\r
+        }\r
+        list.remove(value);\r
+        if (list.isEmpty()) {\r
+            map.remove(key);\r
+        }\r
+    }\r
+}\r
+