/*
* 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.cluster.datastore.persisted;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import java.util.Collection;
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.tree.DataTreeCandidateNode;
import org.opendaylight.yangtools.yang.data.api.schema.tree.ModificationType;
/**
* Abstract base class for our internal implementation of {@link DataTreeCandidateNode},
* which we instantiate from a serialized stream. We do not retain the before-image and
* do not implement {@link #getModifiedChild(PathArgument)}, as that method is only
* useful for end users. Instances based on this class should never be leaked outside of
* this component.
*/
abstract class AbstractDataTreeCandidateNode implements DataTreeCandidateNode {
private final ModificationType type;
protected AbstractDataTreeCandidateNode(final ModificationType type) {
this.type = Preconditions.checkNotNull(type);
}
@Override
public final DataTreeCandidateNode getModifiedChild(final PathArgument identifier) {
throw new UnsupportedOperationException("Not implemented");
}
@Override
public final ModificationType getModificationType() {
return type;
}
@Override
public final Optional<NormalizedNode<?, ?>> getDataBefore() {
throw new UnsupportedOperationException("Before-image not available after serialization");
}
static DataTreeCandidateNode createUnmodified() {
return new AbstractDataTreeCandidateNode(ModificationType.UNMODIFIED) {
@Override
public PathArgument getIdentifier() {
throw new UnsupportedOperationException("Root node does not have an identifier");
}
@Override
public Optional<NormalizedNode<?, ?>> getDataAfter() {
throw new UnsupportedOperationException("After-image not available after serialization");
}
@Override
public Collection<DataTreeCandidateNode> getChildNodes() {
throw new UnsupportedOperationException("Children not available after serialization");
}
};
}
}