+++ /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.controller.md.sal.dom.store.impl.tree.data;
-
-import java.util.LinkedHashMap;
-import java.util.Map;
-
-import javax.annotation.concurrent.GuardedBy;
-
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.ModificationType;
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.StoreTreeNode;
-import org.opendaylight.controller.md.sal.dom.store.impl.tree.spi.TreeNode;
-import org.opendaylight.yangtools.concepts.Identifiable;
-import org.opendaylight.yangtools.yang.data.api.InstanceIdentifier.PathArgument;
-import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
-
-import com.google.common.base.Optional;
-import com.google.common.base.Predicate;
-
-/**
- * Node Modification Node and Tree
- *
- * Tree which structurally resembles data tree and captures client modifications
- * to the data store tree.
- *
- * This tree is lazily created and populated via {@link #modifyChild(PathArgument)}
- * and {@link StoreMetadataNode} which represents original state {@link #getOriginal()}.
- */
-final class ModifiedNode implements StoreTreeNode<ModifiedNode>, Identifiable<PathArgument>, NodeModification {
-
- public static final Predicate<ModifiedNode> IS_TERMINAL_PREDICATE = new Predicate<ModifiedNode>() {
- @Override
- public boolean apply(final ModifiedNode input) {
- switch (input.getType()) {
- case DELETE:
- case MERGE:
- case WRITE:
- return true;
- case SUBTREE_MODIFIED:
- case UNMODIFIED:
- return false;
- }
-
- throw new IllegalArgumentException(String.format("Unhandled modification type %s", input.getType()));
- }
- };
-
- private final Map<PathArgument, ModifiedNode> children = new LinkedHashMap<>();
- private final Optional<TreeNode> original;
- private final PathArgument identifier;
- private ModificationType modificationType = ModificationType.UNMODIFIED;
- private Optional<TreeNode> snapshotCache;
- private NormalizedNode<?, ?> value;
-
- private ModifiedNode(final PathArgument identifier, final Optional<TreeNode> original) {
- this.identifier = identifier;
- this.original = original;
- }
-
- /**
- *
- *
- * @return
- */
- public NormalizedNode<?, ?> getWrittenValue() {
- return value;
- }
-
- @Override
- public PathArgument getIdentifier() {
- return identifier;
- }
-
- /**
- *
- * Returns original store metadata
- * @return original store metadata
- */
- @Override
- public Optional<TreeNode> getOriginal() {
- return original;
- }
-
- /**
- * Returns modification type
- *
- * @return modification type
- */
- @Override
- public ModificationType getType() {
- return modificationType;
- }
-
- /**
- *
- * Returns child modification if child was modified
- *
- * @return Child modification if direct child or it's subtree
- * was modified.
- *
- */
- @Override
- public Optional<ModifiedNode> getChild(final PathArgument child) {
- return Optional.<ModifiedNode> fromNullable(children.get(child));
- }
-
- /**
- *
- * Returns child modification if child was modified, creates {@link ModifiedNode}
- * for child otherwise.
- *
- * If this node's {@link ModificationType} is {@link ModificationType#UNMODIFIED}
- * changes modification type to {@link ModificationType#SUBTREE_MODIFIED}
- *
- * @param child
- * @return {@link ModifiedNode} for specified child, with {@link #getOriginal()}
- * containing child metadata if child was present in original data.
- */
- public ModifiedNode modifyChild(final PathArgument child) {
- clearSnapshot();
- if (modificationType == ModificationType.UNMODIFIED) {
- updateModificationType(ModificationType.SUBTREE_MODIFIED);
- }
- final ModifiedNode potential = children.get(child);
- if (potential != null) {
- return potential;
- }
-
- final Optional<TreeNode> currentMetadata;
- if (original.isPresent()) {
- final TreeNode orig = original.get();
- currentMetadata = orig.getChild(child);
- } else {
- currentMetadata = Optional.absent();
- }
-
- ModifiedNode newlyCreated = new ModifiedNode(child, currentMetadata);
- children.put(child, newlyCreated);
- return newlyCreated;
- }
-
- /**
- *
- * Returns all recorded direct child modification
- *
- * @return all recorded direct child modifications
- */
- @Override
- public Iterable<ModifiedNode> getChildren() {
- return children.values();
- }
-
- /**
- *
- * Records a delete for associated node.
- *
- */
- public void delete() {
- clearSnapshot();
- updateModificationType(ModificationType.DELETE);
- children.clear();
- this.value = null;
- }
-
- /**
- *
- * Records a write for associated node.
- *
- * @param value
- */
- public void write(final NormalizedNode<?, ?> value) {
- clearSnapshot();
- updateModificationType(ModificationType.WRITE);
- children.clear();
- this.value = value;
- }
-
- public void merge(final NormalizedNode<?, ?> data) {
- clearSnapshot();
- updateModificationType(ModificationType.MERGE);
- // FIXME: Probably merge with previous value.
- this.value = data;
- }
-
- void seal() {
- clearSnapshot();
- for (ModifiedNode child : children.values()) {
- child.seal();
- }
- }
-
- private void clearSnapshot() {
- snapshotCache = null;
- }
-
- public Optional<TreeNode> storeSnapshot(final Optional<TreeNode> snapshot) {
- snapshotCache = snapshot;
- return snapshot;
- }
-
- public Optional<Optional<TreeNode>> getSnapshotCache() {
- return Optional.fromNullable(snapshotCache);
- }
-
- @GuardedBy("this")
- private void updateModificationType(final ModificationType type) {
- modificationType = type;
- clearSnapshot();
- }
-
- @Override
- public String toString() {
- return "NodeModification [identifier=" + identifier + ", modificationType="
- + modificationType + ", childModification=" + children + "]";
- }
-
- public static ModifiedNode createUnmodified(final TreeNode metadataTree) {
- return new ModifiedNode(metadataTree.getIdentifier(), Optional.of(metadataTree));
- }
-}
Code Review / controller.git / blobdiff