Bug 2933: Implemented DataTreeChangeService

[controller.git] / opendaylight / md-sal / sal-binding-broker / src / main / java / org / opendaylight / controller / md / sal / binding / impl / LazyDataTreeModification.java

diff --git a/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/LazyDataTreeModification.java b/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/LazyDataTreeModification.java
new file mode 100644 (file)
index 0000000..26fd420
--- /dev/null
+++ b/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/LazyDataTreeModification.java
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * 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.md.sal.binding.impl;
+
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.List;
+import java.util.Map.Entry;
+import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
+import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
+import org.opendaylight.controller.md.sal.binding.api.DataTreeModification;
+import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.yangtools.binding.data.codec.api.BindingCodecTreeNode;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidate;
+
+/**
+ * Lazily translated {@link DataTreeModification} based on {@link DataTreeCandidate}.
+ *
+ * {@link DataTreeModification} represents Data tree change event,
+ * but whole tree is not translated or resolved eagerly, but only child nodes
+ * which are directly accessed by user of data object modification.
+ *
+ */
+class LazyDataTreeModification implements DataTreeModification {
+
+    private final DataTreeIdentifier path;
+    private final DataObjectModification<?> rootNode;
+
+    LazyDataTreeModification(final LogicalDatastoreType datastoreType, final InstanceIdentifier<?> path, final BindingCodecTreeNode<?> codec, final DataTreeCandidate domChange) {
+        this.path = new DataTreeIdentifier(datastoreType, path);
+        this.rootNode = LazyDataObjectModification.create(codec, domChange.getRootNode());
+    }
+
+    @Override
+    public DataObjectModification<? extends DataObject> getRootNode() {
+        return rootNode;
+    }
+
+    @Override
+    public DataTreeIdentifier getRootPath() {
+        return path;
+    }
+
+    static DataTreeModification create(final BindingToNormalizedNodeCodec codec, final DataTreeCandidate domChange,
+            final LogicalDatastoreType datastoreType) {
+        final Entry<InstanceIdentifier<?>, BindingCodecTreeNode<?>> codecCtx =
+                codec.getSubtreeCodec(domChange.getRootPath());
+        return new LazyDataTreeModification(datastoreType, codecCtx.getKey(), codecCtx.getValue(), domChange);
+    }
+
+    static Collection<DataTreeModification> from(final BindingToNormalizedNodeCodec codec,
+            final Collection<DataTreeCandidate> domChanges, final LogicalDatastoreType datastoreType) {
+        final List<DataTreeModification> result = new ArrayList<>(domChanges.size());
+        for (final DataTreeCandidate domChange : domChanges) {
+            result.add(create(codec, domChange, datastoreType));
+        }
+        return result;
+    }
+
+}