X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?p=controller.git;a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-binding-api%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fmd%2Fsal%2Fbinding%2Fapi%2FWriteTransaction.java;h=044a700d84f26b968cb29f6fe3cd6a80e0dbf0ec;hp=0cef81d35922650357ee4bd7e502b5c79f11a3f8;hb=4c84760ea597cf452a0cd904be7c4a5de5f63ec9;hpb=03ee21b4d6ae3dd6fd3a6991253e877dc96fabf5

diff --git a/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/WriteTransaction.java b/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/WriteTransaction.java
index 0cef81d359..044a700d84 100644
--- a/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/WriteTransaction.java
+++ b/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/WriteTransaction.java
@@ -18,8 +18,46 @@ import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
  * For more information on usage and examples, please see the documentation in {@link AsyncWriteTransaction}.
  */
 public interface WriteTransaction extends AsyncWriteTransaction<InstanceIdentifier<?>, DataObject> {
-    @Override
-    void put(LogicalDatastoreType store, InstanceIdentifier<?> path, DataObject data);
+
+    /**
+     * Stores a piece of data at the specified path. This acts as an add / replace
+     * operation, which is to say that whole subtree will be replaced by the specified data.
+     * <p>
+     * For more information on usage and examples, please see the documentation in {@link AsyncWriteTransaction}.
+     * <p>
+     * If you need to make sure that a parent object exists but you do not want modify
+     * its pre-existing state by using put, consider using {@link #merge} instead.
+     *
+     * @param store
+     *            the logical data store which should be modified
+     * @param path
+     *            the data object path
+     * @param data
+     *            the data object to be written to the specified path
+     * @throws IllegalStateException
+     *             if the transaction has already been submitted
+     */
+    <T extends DataObject> void put(LogicalDatastoreType store, InstanceIdentifier<T> path, T data);
+
+    /**
+     * Merges a piece of data with the existing data at a specified path. Any pre-existing data
+     * which is not explicitly overwritten will be preserved. This means that if you store a container,
+     * its child lists will be merged.
+     * <p>
+     * For more information on usage and examples, please see the documentation in {@link AsyncWriteTransaction}.
+     *<p>
+     * If you require an explicit replace operation, use {@link #put} instead.
+     *
+     * @param store
+     *            the logical data store which should be modified
+     * @param path
+     *            the data object path
+     * @param data
+     *            the data object to be merged to the specified path
+     * @throws IllegalStateException
+     *             if the transaction has already been submitted
+     */
+    <T extends DataObject> void merge(LogicalDatastoreType store, InstanceIdentifier<T> path, T data);
 
     @Override
     void delete(LogicalDatastoreType store, InstanceIdentifier<?> path);