| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.jackrabbit.oak.jcr.delegate; |
| |
| import java.util.List; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static org.apache.jackrabbit.JcrConstants.JCR_PREDECESSORS; |
| |
| import javax.jcr.RepositoryException; |
| |
| import org.apache.jackrabbit.JcrConstants; |
| import org.apache.jackrabbit.oak.api.Tree; |
| import org.apache.jackrabbit.oak.api.Type; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| import com.google.common.collect.Lists; |
| |
| /** |
| * {@code VersionDelegate}... |
| */ |
| public class VersionDelegate extends NodeDelegate { |
| |
| private VersionDelegate(SessionDelegate sessionDelegate, Tree tree) { |
| super(checkNotNull(sessionDelegate), checkNotNull(tree)); |
| } |
| |
| static VersionDelegate create(@NotNull SessionDelegate sessionDelegate, |
| @NotNull Tree tree) { |
| return new VersionDelegate(sessionDelegate, tree); |
| } |
| |
| @NotNull |
| NodeDelegate getFrozenNode() throws RepositoryException { |
| NodeDelegate frozenNode = getChild(JcrConstants.JCR_FROZENNODE); |
| if (frozenNode == null) { |
| throw new RepositoryException("Inconsistent version storage. " + |
| "Version at " + getPath() + " does not have a jcr:frozenNode"); |
| } |
| return frozenNode; |
| } |
| |
| @NotNull |
| public Iterable<VersionDelegate> getPredecessors() |
| throws RepositoryException { |
| PropertyDelegate p = getPropertyOrNull(JCR_PREDECESSORS); |
| if (p == null) { |
| throw new RepositoryException("Inconsistent version storage. " + |
| "Version does not have a " + JCR_PREDECESSORS + " property."); |
| } |
| List<VersionDelegate> predecessors = Lists.newArrayList(); |
| VersionManagerDelegate vMgr = VersionManagerDelegate.create(sessionDelegate); |
| for (String id : p.getMultiState().getValue(Type.REFERENCES)) { |
| predecessors.add(vMgr.getVersionByIdentifier(id)); |
| } |
| return predecessors; |
| } |
| |
| @Nullable |
| public VersionDelegate getLinearPredecessor() throws RepositoryException { |
| Iterable<VersionDelegate> predecessors = getPredecessors(); |
| if (predecessors.iterator().hasNext()) { |
| // return first predecessor (same behavior as Jackrabbit) |
| return predecessors.iterator().next(); |
| } |
| return null; |
| } |
| } |