Bug 2933: Implemented DataTreeChangeService

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

diff --git a/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/BindingDOMDataTreeChangeServiceAdapter.java b/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/BindingDOMDataTreeChangeServiceAdapter.java
new file mode 100644 (file)
index 0000000..04c6ad5
--- /dev/null
+++ b/opendaylight/md-sal/sal-binding-broker/src/main/java/org/opendaylight/controller/md/sal/binding/impl/BindingDOMDataTreeChangeServiceAdapter.java
@@ -0,0 +1,59 @@
+/*
+ * 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 com.google.common.base.Preconditions;
+import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeListener;
+import org.opendaylight.controller.md.sal.binding.api.DataTreeChangeService;
+import org.opendaylight.controller.md.sal.binding.api.DataTreeIdentifier;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeChangeService;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataTreeIdentifier;
+import org.opendaylight.yangtools.concepts.ListenerRegistration;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+
+
+/**
+ *
+ * Adapter exposing Binding {@link DataTreeChangeService} and wrapping
+ * {@link DOMDataTreeChangeService} and is responsible for translation
+ * and instantiation of {@link BindingDOMDataTreeChangeListenerAdapter}
+ * adapters.
+ *
+ * Each registered {@link DataTreeChangeListener} is wrapped using
+ * adapter and registered directly to DOM service.
+ */
+final class BindingDOMDataTreeChangeServiceAdapter implements DataTreeChangeService {
+
+    private final BindingToNormalizedNodeCodec codec;
+    private final DOMDataTreeChangeService dataTreeChangeService;
+
+    private BindingDOMDataTreeChangeServiceAdapter(final BindingToNormalizedNodeCodec codec,
+            final DOMDataTreeChangeService dataTreeChangeService) {
+        this.codec = Preconditions.checkNotNull(codec);
+        this.dataTreeChangeService = Preconditions.checkNotNull(dataTreeChangeService);
+    }
+
+    static DataTreeChangeService create(final BindingToNormalizedNodeCodec codec,
+            final DOMDataTreeChangeService dataTreeChangeService) {
+        return new BindingDOMDataTreeChangeServiceAdapter(codec, dataTreeChangeService);
+    }
+
+    @Override
+    public <L extends DataTreeChangeListener> ListenerRegistration<L> registerDataTreeChangeListener(
+            final DataTreeIdentifier treeId, final L listener) {
+        final DOMDataTreeIdentifier domIdentifier = toDomTreeIdentifier(treeId);
+        final BindingDOMDataTreeChangeListenerAdapter domListener = new BindingDOMDataTreeChangeListenerAdapter(codec,listener, treeId.getDatastoreType());
+        final ListenerRegistration<BindingDOMDataTreeChangeListenerAdapter> domReg = dataTreeChangeService.registerDataTreeChangeListener(domIdentifier, domListener);
+        return new BindingDataTreeChangeListenerRegistration<>(listener,domReg);
+    }
+
+    private DOMDataTreeIdentifier toDomTreeIdentifier(final DataTreeIdentifier treeId) {
+        final YangInstanceIdentifier domPath = codec.toYangInstanceIdentifier(treeId.getRootIdentifier());
+        return new DOMDataTreeIdentifier(treeId.getDatastoreType(), domPath);
+    }
+}