--- /dev/null
+/*
+ * Copyright (c) 2014 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.yangtools.yang.data.impl.schema.tree;
+
+import com.google.common.base.MoreObjects.ToStringHelper;
+import java.util.Optional;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.NodeIdentifier;
+import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.PathArgument;
+import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListEntryNode;
+import org.opendaylight.yangtools.yang.data.api.schema.UnkeyedListNode;
+import org.opendaylight.yangtools.yang.data.api.schema.builder.NormalizedNodeContainerBuilder;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeConfiguration;
+import org.opendaylight.yangtools.yang.data.api.schema.tree.IncorrectDataStructureException;
+import org.opendaylight.yangtools.yang.data.impl.schema.ImmutableNodes;
+import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableUnkeyedListEntryNodeBuilder;
+import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableUnkeyedListNodeBuilder;
+import org.opendaylight.yangtools.yang.data.spi.tree.MutableTreeNode;
+import org.opendaylight.yangtools.yang.data.spi.tree.TreeNode;
+import org.opendaylight.yangtools.yang.data.spi.tree.TreeNodeFactory;
+import org.opendaylight.yangtools.yang.data.spi.tree.Version;
+import org.opendaylight.yangtools.yang.model.api.ListSchemaNode;
+
+final class ListModificationStrategy extends SchemaAwareApplyOperation<ListSchemaNode> {
+ private static final NormalizedNodeContainerSupport<NodeIdentifier, UnkeyedListEntryNode> ITEM_SUPPORT =
+ new NormalizedNodeContainerSupport<>(UnkeyedListEntryNode.class,
+ ImmutableUnkeyedListEntryNodeBuilder::create, ImmutableUnkeyedListEntryNodeBuilder::create);
+
+ private final DataNodeContainerModificationStrategy<ListSchemaNode> entryStrategy;
+ private final UnkeyedListNode emptyNode;
+
+ ListModificationStrategy(final ListSchemaNode schema, final DataTreeConfiguration treeConfig) {
+ entryStrategy = new DataNodeContainerModificationStrategy<>(ITEM_SUPPORT, schema, treeConfig);
+ emptyNode = ImmutableNodes.listNode(schema.getQName());
+ }
+
+ @Override
+ ListSchemaNode getSchema() {
+ return entryStrategy.getSchema();
+ }
+
+ @Override
+ Optional<? extends TreeNode> apply(final ModifiedNode modification, final Optional<? extends TreeNode> storeMeta,
+ final Version version) {
+ return AutomaticLifecycleMixin.apply(super::apply, this::applyWrite, emptyNode, modification, storeMeta,
+ version);
+ }
+
+ @Override
+ protected ChildTrackingPolicy getChildPolicy() {
+ return ChildTrackingPolicy.ORDERED;
+ }
+
+ @Override
+ protected TreeNode applyMerge(final ModifiedNode modification, final TreeNode currentMeta, final Version version) {
+ throw new IllegalStateException(String.format("Merge of modification %s on unkeyed list should never be called",
+ modification));
+ }
+
+ @Override
+ protected TreeNode applyTouch(final ModifiedNode modification, final TreeNode currentMeta, final Version version) {
+ throw new UnsupportedOperationException("UnkeyedList does not support subtree change.");
+ }
+
+ @Override
+ protected TreeNode applyWrite(final ModifiedNode modification, final NormalizedNode newValue,
+ final Optional<? extends TreeNode> currentMeta, final Version version) {
+ final TreeNode newValueMeta = TreeNodeFactory.createTreeNode(newValue, version);
+ if (modification.getChildren().isEmpty()) {
+ return newValueMeta;
+ }
+
+ /*
+ * This is where things get interesting. The user has performed a write and then she applied some more
+ * modifications to it. So we need to make sense of that an apply the operations on top of the written value. We
+ * could have done it during the write, but this operation is potentially expensive, so we have left it out of
+ * the fast path.
+ *
+ * As it turns out, once we materialize the written data, we can share the code path with the subtree change. So
+ * let's create an unsealed TreeNode and run the common parts on it -- which end with the node being sealed.
+ */
+ final MutableTreeNode mutable = newValueMeta.mutable();
+ mutable.setSubtreeVersion(version);
+
+ return mutateChildren(mutable, ImmutableUnkeyedListNodeBuilder.create((UnkeyedListNode) newValue), version,
+ modification.getChildren());
+ }
+
+ /**
+ * Applies write/remove diff operation for each modification child in modification subtree.
+ * Operation also sets the Data tree references for each Tree Node (Index Node) in meta (MutableTreeNode) structure.
+ *
+ * @param meta MutableTreeNode (IndexTreeNode)
+ * @param data DataBuilder
+ * @param nodeVersion Version of TreeNode
+ * @param modifications modification operations to apply
+ * @return Sealed immutable copy of TreeNode structure with all Data Node references set.
+ */
+ @SuppressWarnings({ "rawtypes", "unchecked" })
+ private TreeNode mutateChildren(final MutableTreeNode meta, final NormalizedNodeContainerBuilder data,
+ final Version nodeVersion, final Iterable<ModifiedNode> modifications) {
+
+ for (final ModifiedNode mod : modifications) {
+ final PathArgument id = mod.getIdentifier();
+ final Optional<? extends TreeNode> cm = meta.findChildByArg(id);
+
+ final Optional<? extends TreeNode> result = resolveChildOperation(id).apply(mod, cm, nodeVersion);
+ if (result.isPresent()) {
+ final TreeNode tn = result.get();
+ meta.putChild(tn);
+ data.addChild(tn.getData());
+ } else {
+ meta.removeChild(id);
+ data.removeChild(id);
+ }
+ }
+
+ meta.setData(data.build());
+ return meta.seal();
+ }
+
+ @Override
+ public ModificationApplyOperation childByArg(final PathArgument arg) {
+ return arg instanceof NodeIdentifier ? entryStrategy : null;
+ }
+
+ @Override
+ void verifyValue(final NormalizedNode value) {
+ // NOOP
+ }
+
+ @Override
+ void recursivelyVerifyStructure(final NormalizedNode value) {
+ // NOOP
+ }
+
+ @Override
+ protected void checkTouchApplicable(final ModificationPath path, final NodeModification modification,
+ final Optional<? extends TreeNode> current, final Version version) throws IncorrectDataStructureException {
+ throw new IncorrectDataStructureException(path.toInstanceIdentifier(), "Subtree modification is not allowed.");
+ }
+
+ @Override
+ void mergeIntoModifiedNode(final ModifiedNode node, final NormalizedNode value, final Version version) {
+ // Unkeyed lists are always replaced
+ node.write(value);
+ }
+
+ @Override
+ ToStringHelper addToStringAttributes(final ToStringHelper helper) {
+ return helper.add("entry", entryStrategy);
+ }
+}
Code Review / yangtools.git / blobdiff