X-Git-Url: https://git.opendaylight.org/gerrit/gitweb?a=blobdiff_plain;f=opendaylight%2Fmd-sal%2Fsal-binding-api%2Fsrc%2Fmain%2Fjava%2Forg%2Fopendaylight%2Fcontroller%2Fmd%2Fsal%2Fbinding%2Fapi%2FReadTransaction.java;h=cc85d4337b93d5b1a2322af009052b7c26091bd8;hb=c222e37f2a0f0f3f6266242fbea2d3b018f4e6e3;hp=a7b5f3295778c4f758e1c23785f3ef9fef9426bd;hpb=b2e6c299fad844633c8b40a2e180780f5774a4ae;p=controller.git

diff --git a/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/ReadTransaction.java b/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/ReadTransaction.java
index a7b5f32957..cc85d4337b 100644
--- a/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/ReadTransaction.java
+++ b/opendaylight/md-sal/sal-binding-api/src/main/java/org/opendaylight/controller/md/sal/binding/api/ReadTransaction.java
@@ -15,7 +15,32 @@ import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
 import com.google.common.base.Optional;
 import com.google.common.util.concurrent.ListenableFuture;
 
+/**
+ * A transaction that provides read access to a logical data store.
+ * <p>
+ * For more information on usage and examples, please see the documentation in {@link AsyncReadTransaction}.
+ */
 public interface ReadTransaction extends AsyncReadTransaction<InstanceIdentifier<?>, DataObject> {
-    @Override
-    ListenableFuture<Optional<DataObject>> read(LogicalDatastoreType store, InstanceIdentifier<?> path);
+
+    /**
+     * Reads data from the provided logical data store located at the provided path.
+     *<p>
+     * If the target is a subtree, then the whole subtree is read (and will be
+     * accessible from the returned data object).
+     *
+     * @param store
+     *            Logical data store from which read should occur.
+     * @param path
+     *            Path which uniquely identifies subtree which client want to
+     *            read
+     * @return Listenable Future which contains read result
+     *         <ul>
+     *         <li>If data at supplied path exists the
+     *         {@link ListeblaFuture#get()} returns Optional object containing
+     *         data once read is done.
+     *         <li>If data at supplied path does not exists the
+     *         {@link ListenbleFuture#get()} returns {@link Optional#absent()}.
+     *         </ul>
+     */
+    <T extends DataObject> ListenableFuture<Optional<T>> read(LogicalDatastoreType store, InstanceIdentifier<T> path);
 }