HONEYCOMB-8: Move data layer from impl module into submodules

Change-Id: Ic75793f65cfcad7cc2c96e7a09093e0e1802e4e5
Signed-off-by: Marek Gradzki <mgradzki@cisco.com>
Signed-off-by: Maros Marsalek <mmarsale@cisco.com>

1 files changed, 76 insertions, 0 deletions

diff --git a/v3po/data-impl/src/main/java/io/fd/honeycomb/v3po/data/impl/DataTreeUtils.java b/v3po/data-impl/src/main/java/io/fd/honeycomb/v3po/data/impl/DataTreeUtils.java
new file mode 100644
index 000000000..83ed0f263
--- /dev/null
+++ b/v3po/data-impl/src/main/java/io/fd/honeycomb/v3po/data/impl/DataTreeUtils.java
@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2016 Cisco and/or its affiliates.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.fd.honeycomb.v3po.data.impl;
+
+import com.google.common.base.Preconditions;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import javax.annotation.Nonnull;
+import org.opendaylight.mdsal.binding.dom.codec.api.BindingNormalizedNodeSerializer;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
+import org.opendaylight.yangtools.yang.data.api.schema.DataContainerNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Utility class for various operations on DataTree.
+ */
+final class DataTreeUtils {
+    private static final Logger LOG = LoggerFactory.getLogger(DataTreeUtils.class);
+
+    private DataTreeUtils() {
+        throw new UnsupportedOperationException("Can't instantiate util class");
+    }
+
+    /**
+     * Translates children of supplied YANG ContainerNode into Binding data.
+     *
+     * @param parent     ContainerNode representing data
+     * @param serializer service for serialization between Java Binding Data representation and NormalizedNode
+     *                   representation.
+     * @return NormalizedNode representation of parent's node children
+     */
+    static Map<InstanceIdentifier<?>, DataObject> childrenFromNormalized(@Nonnull final DataContainerNode parent,
+                                                                         @Nonnull final BindingNormalizedNodeSerializer serializer) {
+
+        Preconditions.checkNotNull(parent, "parent node should not be null");
+        Preconditions.checkNotNull(serializer, "serializer should not be null");
+
+        final Map<InstanceIdentifier<?>, DataObject> map = new HashMap<>();
+
+        final Collection<DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?>> children =
+                parent.getValue();
+
+        for (final DataContainerChild<? extends YangInstanceIdentifier.PathArgument, ?> child : children) {
+            final YangInstanceIdentifier.PathArgument pathArgument = child.getIdentifier();
+            final YangInstanceIdentifier identifier = YangInstanceIdentifier.create(pathArgument);
+            LOG.debug("VppConfigDataProxy.extractDataObject() child={}, pathArgument={}, identifier={}", child,
+                    pathArgument, identifier);
+
+            final Map.Entry<InstanceIdentifier<?>, DataObject> entry = serializer.fromNormalizedNode(identifier, child);
+            if (entry != null) {
+                map.put(entry.getKey(), entry.getValue());
+            }
+        }
+
+        return map;
+    }
+}