+++ /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 static com.google.common.base.Preconditions.checkArgument;
-import com.google.common.base.Optional;
-import java.util.Collection;
-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.NormalizedNodeContainer;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.DataValidationFailedException;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.ModifiedNodeDoesNotExistException;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.MutableTreeNode;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNodeFactory;
-import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version;
-import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.NormalizedNodeContainerBuilder;
-
-abstract class NormalizedNodeContainerModificationStrategy extends SchemaAwareApplyOperation {
-
- private final Class<? extends NormalizedNode<?, ?>> nodeClass;
-
- protected NormalizedNodeContainerModificationStrategy(final Class<? extends NormalizedNode<?, ?>> nodeClass) {
- this.nodeClass = nodeClass;
- }
-
- @Override
- public void verifyStructure(final ModifiedNode modification) throws IllegalArgumentException {
- for (ModifiedNode childModification : modification.getChildren()) {
- resolveChildOperation(childModification.getIdentifier()).verifyStructure(childModification);
- }
- }
-
- @SuppressWarnings("rawtypes")
- @Override
- protected void verifyWrittenStructure(final NormalizedNode<?, ?> writtenValue) {
- checkArgument(nodeClass.isInstance(writtenValue), "Node %s is not of type %s", writtenValue, nodeClass);
- checkArgument(writtenValue instanceof NormalizedNodeContainer);
-
- NormalizedNodeContainer container = (NormalizedNodeContainer) writtenValue;
- for (Object child : container.getValue()) {
- checkArgument(child instanceof NormalizedNode);
-
- /*
- * FIXME: fail-fast semantics:
- *
- * We can validate the data structure here, aborting the commit
- * before it ever progresses to being committed.
- */
- }
- }
-
- @Override
- protected TreeNode applyWrite(final ModifiedNode modification,
- final Optional<TreeNode> currentMeta, final Version version) {
- final NormalizedNode<?, ?> newValue = modification.getWrittenValue();
- 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.
- *
- * FIXME: this code needs to be moved out from the prepare() path and into
- * the read() and seal() paths. Merging of writes needs to be charged
- * to the code which originated this, not to the code which is
- * attempting to make it visible.
- */
- final MutableTreeNode mutable = newValueMeta.mutable();
- mutable.setSubtreeVersion(version);
-
- @SuppressWarnings("rawtypes")
- final NormalizedNodeContainerBuilder dataBuilder = createBuilder(newValue);
-
- return mutateChildren(mutable, dataBuilder, 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 (ModifiedNode mod : modifications) {
- final YangInstanceIdentifier.PathArgument id = mod.getIdentifier();
- final Optional<TreeNode> cm = meta.getChild(id);
-
- Optional<TreeNode> result = resolveChildOperation(id).apply(mod, cm, nodeVersion);
- if (result.isPresent()) {
- final TreeNode tn = result.get();
- meta.addChild(tn);
- data.addChild(tn.getData());
- } else {
- meta.removeChild(id);
- data.removeChild(id);
- }
- }
-
- meta.setData(data.build());
- return meta.seal();
- }
-
- @Override
- protected TreeNode applyMerge(final ModifiedNode modification, final TreeNode currentMeta,
- final Version version) {
- // For Node Containers - merge is same as subtree change - we only replace children.
- return applySubtreeChange(modification, currentMeta, version);
- }
-
- @Override
- public TreeNode applySubtreeChange(final ModifiedNode modification,
- final TreeNode currentMeta, final Version version) {
- final MutableTreeNode newMeta = currentMeta.mutable();
- newMeta.setSubtreeVersion(version);
-
- /*
- * The user has issued an empty merge operation. In this case we do not perform
- * a data tree mutation, do not pass GO, and do not collect useless garbage.
- */
- final Collection<ModifiedNode> children = modification.getChildren();
- if (children.isEmpty()) {
- modification.resolveModificationType(ModificationType.UNMODIFIED);
- newMeta.setData(currentMeta.getData());
- return newMeta.seal();
- }
-
- @SuppressWarnings("rawtypes")
- NormalizedNodeContainerBuilder dataBuilder = createBuilder(currentMeta.getData());
-
- /*
- * TODO: this is not entirely accurate. If there is only an empty merge operation
- * among the children, its effect is ModificationType.UNMODIFIED. That would
- * mean this operation can be turned into UNMODIFIED, cascading that further
- * up the root -- potentially turning the entire transaction into a no-op
- * from the perspective of physical replication.
- *
- * In order to do that, though, we either have to walk the children ourselves
- * (looking for a non-UNMODIFIED child), or have mutateChildren() pass that
- * information back to us.
- */
- modification.resolveModificationType(ModificationType.SUBTREE_MODIFIED);
- return mutateChildren(newMeta, dataBuilder, version, children);
- }
-
- @Override
- protected void checkSubtreeModificationApplicable(final YangInstanceIdentifier path, final NodeModification modification,
- final Optional<TreeNode> current) throws DataValidationFailedException {
- if (!modification.getOriginal().isPresent() && !current.isPresent()) {
- throw new ModifiedNodeDoesNotExistException(path, String.format("Node %s does not exist. Cannot apply modification to its children.", path));
- }
-
- SchemaAwareApplyOperation.checkConflicting(path, current.isPresent(), "Node was deleted by other transaction.");
- checkChildPreconditions(path, modification, current);
- }
-
- private void checkChildPreconditions(final YangInstanceIdentifier path, final NodeModification modification, final Optional<TreeNode> current) throws DataValidationFailedException {
- final TreeNode currentMeta = current.get();
- for (NodeModification childMod : modification.getChildren()) {
- final YangInstanceIdentifier.PathArgument childId = childMod.getIdentifier();
- final Optional<TreeNode> childMeta = currentMeta.getChild(childId);
-
- YangInstanceIdentifier childPath = path.node(childId);
- resolveChildOperation(childId).checkApplicable(childPath, childMod, childMeta);
- }
- }
-
- @Override
- protected void checkMergeApplicable(final YangInstanceIdentifier path, final NodeModification modification,
- final Optional<TreeNode> current) throws DataValidationFailedException {
- if(current.isPresent()) {
- checkChildPreconditions(path, modification,current);
- }
- }
-
- @SuppressWarnings("rawtypes")
- protected abstract NormalizedNodeContainerBuilder createBuilder(NormalizedNode<?, ?> original);
-}
Code Review / yangtools.git / blobdiff