--- /dev/null
+/*
+ * 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.Optional;
+import com.google.common.base.Preconditions;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.List;
+import org.opendaylight.controller.md.sal.binding.api.DataObjectModification;
+import org.opendaylight.yangtools.binding.data.codec.api.BindingCodecTreeNode;
+import org.opendaylight.yangtools.yang.binding.ChildOf;
+import org.opendaylight.yangtools.yang.binding.DataObject;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier;
+import org.opendaylight.yangtools.yang.binding.InstanceIdentifier.PathArgument;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeCandidateNode;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Lazily translated {@link DataObjectModification} based on {@link DataTreeCandidateNode}.
+ *
+ * {@link LazyDataObjectModification} 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.
+ *
+ * @param <T> Type of Binding Data Object
+ */
+class LazyDataObjectModification<T extends DataObject> implements DataObjectModification<T> {
+
+ private final static Logger LOG = LoggerFactory.getLogger(LazyDataObjectModification.class);
+
+ private final BindingCodecTreeNode<T> codec;
+ private final DataTreeCandidateNode domData;
+ private final PathArgument identifier;
+ private Collection<DataObjectModification<? extends DataObject>> childNodesCache;
+
+ private LazyDataObjectModification(final BindingCodecTreeNode<T> codec, final DataTreeCandidateNode domData) {
+ this.codec = Preconditions.checkNotNull(codec);
+ this.domData = Preconditions.checkNotNull(domData);
+ this.identifier = codec.deserializePathArgument(domData.getIdentifier());
+ }
+
+ static DataObjectModification<? extends DataObject> create(final BindingCodecTreeNode<?> codec,
+ final DataTreeCandidateNode domData) {
+ return new LazyDataObjectModification<>(codec,domData);
+ }
+
+ static Collection<DataObjectModification<? extends DataObject>> from(final BindingCodecTreeNode<?> parentCodec,
+ final Collection<DataTreeCandidateNode> domChildNodes) {
+ final ArrayList<DataObjectModification<? extends DataObject>> result = new ArrayList<>(domChildNodes.size());
+ populateList(result, parentCodec, domChildNodes);
+ return result;
+ }
+
+ private static void populateList(final List<DataObjectModification<? extends DataObject>> result,
+ final BindingCodecTreeNode<?> parentCodec, final Collection<DataTreeCandidateNode> domChildNodes) {
+ for (final DataTreeCandidateNode domChildNode : domChildNodes) {
+ final BindingStructuralType type = BindingStructuralType.from(domChildNode);
+ if (type != BindingStructuralType.NOT_ADDRESSABLE) {
+ /*
+ * Even if type is UNKNOWN, from perspective of BindingStructuralType
+ * we try to load codec for it. We will use that type to further specify
+ * debug log.
+ */
+ try {
+ final BindingCodecTreeNode<?> childCodec =
+ parentCodec.yangPathArgumentChild(domChildNode.getIdentifier());
+ populateList(result,type, childCodec, domChildNode);
+ } catch (final IllegalArgumentException e) {
+ if(type == BindingStructuralType.UNKNOWN) {
+ LOG.debug("Unable to deserialize unknown DOM node {}",domChildNode,e);
+ } else {
+ LOG.debug("Binding representation for DOM node {} was not found",domChildNode,e);
+ }
+ }
+ }
+ }
+ }
+
+
+ private static void populateList(final List<DataObjectModification<? extends DataObject>> result,
+ final BindingStructuralType type, final BindingCodecTreeNode<?> childCodec,
+ final DataTreeCandidateNode domChildNode) {
+ switch (type) {
+ case INVISIBLE_LIST:
+ // We use parent codec intentionally.
+ populateListWithSingleCodec(result, childCodec, domChildNode.getChildNodes());
+ break;
+ case INVISIBLE_CONTAINER:
+ populateList(result, childCodec, domChildNode.getChildNodes());
+ break;
+ case UNKNOWN:
+ case VISIBLE_CONTAINER:
+ result.add(create(childCodec, domChildNode));
+ default:
+ break;
+ }
+ }
+
+ private static void populateListWithSingleCodec(final List<DataObjectModification<? extends DataObject>> result,
+ final BindingCodecTreeNode<?> codec, final Collection<DataTreeCandidateNode> childNodes) {
+ for (final DataTreeCandidateNode child : childNodes) {
+ result.add(create(codec, child));
+ }
+ }
+
+ @Override
+ public T getDataAfter() {
+ return deserialize(domData.getDataAfter());
+ }
+
+ @Override
+ public Class<T> getDataType() {
+ return codec.getBindingClass();
+ }
+
+ @Override
+ public PathArgument getIdentifier() {
+ return identifier;
+ }
+
+ @Override
+ public DataObjectModification.ModificationType getModificationType() {
+ switch(domData.getModificationType()) {
+ case WRITE:
+ return DataObjectModification.ModificationType.WRITE;
+ case SUBTREE_MODIFIED:
+ return DataObjectModification.ModificationType.SUBTREE_MODIFIED;
+ case DELETE:
+ return DataObjectModification.ModificationType.DELETE;
+
+ default:
+ // TODO: Should we lie about modification type instead of exception?
+ throw new IllegalStateException("Unsupported DOM Modification type " + domData.getModificationType());
+ }
+ }
+
+ @Override
+ public Collection<DataObjectModification<? extends DataObject>> getModifiedChildren() {
+ if(childNodesCache == null) {
+ childNodesCache = from(codec,domData.getChildNodes());
+ }
+ return childNodesCache;
+ }
+
+ public DataObjectModification<? extends DataObject> getModifiedChild(final PathArgument arg) {
+ final List<YangInstanceIdentifier.PathArgument> domArgumentList = new ArrayList<>();
+ final BindingCodecTreeNode<?> childCodec = codec.bindingPathArgumentChild(arg, domArgumentList);
+ final Iterator<YangInstanceIdentifier.PathArgument> toEnter = domArgumentList.iterator();
+ DataTreeCandidateNode current = domData;
+ while (toEnter.hasNext() && current != null) {
+ current = current.getModifiedChild(toEnter.next());
+ }
+ if (current != null) {
+ return create(childCodec, current);
+ }
+ return null;
+ }
+
+ @SuppressWarnings("unchecked")
+ public <C extends ChildOf<T>> DataObjectModification<C> getModifiedChild(final Class<C> arg) {
+ return (DataObjectModification<C>) getModifiedChild(new InstanceIdentifier.Item<>(arg));
+ }
+
+ private T deserialize(final Optional<NormalizedNode<?, ?>> dataAfter) {
+ if(dataAfter.isPresent()) {
+ return codec.deserialize(dataAfter.get());
+ }
+ return null;
+ }
+}
Code Review / mdsal.git / blobdiff