/*
* 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 com.google.common.base.Preconditions;
import com.google.common.base.Predicates;
import com.google.common.base.Verify;
import com.google.common.collect.Collections2;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableMap.Builder;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier.AugmentationIdentifier;
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.ChoiceNode;
import org.opendaylight.yangtools.yang.data.api.schema.DataContainerChild;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNodes;
import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTreeConfiguration;
import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.TreeNode;
import org.opendaylight.yangtools.yang.data.api.schema.tree.spi.Version;
import org.opendaylight.yangtools.yang.data.impl.schema.builder.api.DataContainerNodeBuilder;
import org.opendaylight.yangtools.yang.data.impl.schema.builder.impl.ImmutableChoiceNodeBuilder;
import org.opendaylight.yangtools.yang.model.api.AugmentationSchema;
import org.opendaylight.yangtools.yang.model.api.ChoiceCaseNode;
import org.opendaylight.yangtools.yang.model.api.ChoiceSchemaNode;
import org.opendaylight.yangtools.yang.model.api.DataSchemaNode;
final class ChoiceModificationStrategy extends AbstractNodeContainerModificationStrategy {
private final Map<PathArgument, ModificationApplyOperation> childNodes;
// FIXME: enforce leaves not coming from two case statements at the same time
private final Map<CaseEnforcer, Collection<CaseEnforcer>> exclusions;
private final Map<PathArgument, CaseEnforcer> caseEnforcers;
ChoiceModificationStrategy(final ChoiceSchemaNode schemaNode, final DataTreeConfiguration treeConfig) {
super(ChoiceNode.class, treeConfig);
final Builder<PathArgument, ModificationApplyOperation> childBuilder = ImmutableMap.builder();
final Builder<PathArgument, CaseEnforcer> enforcerBuilder = ImmutableMap.builder();
for (final ChoiceCaseNode caze : schemaNode.getCases()) {
final CaseEnforcer enforcer = CaseEnforcer.forTree(caze, treeConfig);
if (enforcer != null) {
for (final Entry<NodeIdentifier, DataSchemaNode> e : enforcer.getChildEntries()) {
childBuilder.put(e.getKey(), SchemaAwareApplyOperation.from(e.getValue(), treeConfig));
enforcerBuilder.put(e.getKey(), enforcer);
}
for (final Entry<AugmentationIdentifier, AugmentationSchema> e : enforcer.getAugmentationEntries()) {
childBuilder.put(e.getKey(), new AugmentationModificationStrategy(e.getValue(), caze, treeConfig));
enforcerBuilder.put(e.getKey(), enforcer);
}
}
}
childNodes = childBuilder.build();
caseEnforcers = enforcerBuilder.build();
final Map<CaseEnforcer, Collection<CaseEnforcer>> exclusionsBuilder = new HashMap<>();
for (final CaseEnforcer e : caseEnforcers.values()) {
exclusionsBuilder.put(e, ImmutableList.copyOf(
Collections2.filter(caseEnforcers.values(), Predicates.not(Predicates.equalTo(e)))));
}
exclusions = ImmutableMap.copyOf(exclusionsBuilder);
}
@Override
public Optional<ModificationApplyOperation> getChild(final PathArgument child) {
return Optional.fromNullable(childNodes.get(child));
}
@Override
@SuppressWarnings("rawtypes")
protected DataContainerNodeBuilder createBuilder(final NormalizedNode<?, ?> original) {
checkArgument(original instanceof ChoiceNode);
return ImmutableChoiceNodeBuilder.create((ChoiceNode) original);
}
@Override
void verifyStructure(final NormalizedNode<?, ?> writtenValue, final boolean verifyChildren) {
if (verifyChildrenStructure() && verifyChildren) {
enforceCases(writtenValue);
}
super.verifyStructure(writtenValue, verifyChildren);
}
private void enforceCases(final TreeNode tree) {
enforceCases(tree.getData());
}
private void enforceCases(final NormalizedNode<?, ?> normalizedNode) {
Verify.verify(normalizedNode instanceof ChoiceNode);
final Collection<DataContainerChild<?, ?>> children = ((ChoiceNode) normalizedNode).getValue();
if (!children.isEmpty()) {
final DataContainerChild<?, ?> firstChild = children.iterator().next();
final CaseEnforcer enforcer = caseEnforcers.get(firstChild.getIdentifier());
Verify.verifyNotNull(enforcer, "Case enforcer cannot be null. Most probably, child node %s of choice node %s does not belong in current tree type.", firstChild.getIdentifier(), normalizedNode.getIdentifier());
// Make sure no leaves from other cases are present
for (final CaseEnforcer other : exclusions.get(enforcer)) {
for (final PathArgument id : other.getAllChildIdentifiers()) {
final Optional<NormalizedNode<?, ?>> maybeChild = NormalizedNodes.getDirectChild(normalizedNode, id);
Preconditions.checkArgument(!maybeChild.isPresent(),
"Child %s (from case %s) implies non-presence of child %s (from case %s), which is %s",
firstChild.getIdentifier(), enforcer, id, other, maybeChild.orNull());
}
}
// Make sure all mandatory children are present
enforcer.enforceOnTreeNode(normalizedNode);
}
}
@Override
protected TreeNode applyMerge(final ModifiedNode modification, final TreeNode currentMeta, final Version version) {
final TreeNode ret = super.applyMerge(modification, currentMeta, version);
enforceCases(ret);
return ret;
}
@Override
protected TreeNode applyWrite(final ModifiedNode modification, final Optional<TreeNode> currentMeta,
final Version version) {
final TreeNode ret = super.applyWrite(modification, currentMeta, version);
enforceCases(ret);
return ret;
}
@Override
protected TreeNode applyTouch(final ModifiedNode modification, final TreeNode currentMeta, final Version version) {
final TreeNode ret = super.applyTouch(modification, currentMeta, version);
enforceCases(ret);
return ret;
}
@Override
protected NormalizedNode<?, ?> createEmptyValue(final NormalizedNode<?, ?> original) {
checkArgument(original instanceof ChoiceNode);
return ImmutableChoiceNodeBuilder.create().withNodeIdentifier(((ChoiceNode) original).getIdentifier()).build();
}
}