| /* |
| * 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.plugins.document; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.Map; |
| |
| import org.apache.jackrabbit.oak.plugins.document.util.Utils; |
| import org.jetbrains.annotations.NotNull; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Helper class to track when a node was last modified. |
| */ |
| final class LastRevs implements Iterable<Revision> { |
| |
| private final Map<Integer, Revision> revs; |
| |
| private final RevisionVector readRevision; |
| |
| private final Branch branch; |
| |
| private Revision branchRev; |
| |
| LastRevs(RevisionVector readRevision) { |
| this(Collections.<Integer, Revision>emptyMap(), readRevision, null); |
| } |
| |
| LastRevs(Map<Integer, Revision> revs, |
| RevisionVector readRevision, |
| Branch branch) { |
| this.revs = new HashMap<Integer, Revision>(revs); |
| this.readRevision = readRevision; |
| this.branch = branch; |
| } |
| |
| void update(@Nullable Revision rev) { |
| if (rev == null) { |
| return; |
| } |
| Revision r = revs.get(rev.getClusterId()); |
| if (r == null || rev.compareRevisionTime(r) > 0) { |
| revs.put(rev.getClusterId(), rev); |
| } |
| } |
| |
| void updateBranch(@Nullable Revision rev) { |
| if (rev == null) { |
| return; |
| } |
| rev = rev.asBranchRevision(); |
| if (branch != null && branch.containsCommit(rev) |
| && readRevision.getBranchRevision().compareRevisionTime(rev) >= 0) { |
| branchRev = Utils.max(branchRev, rev); |
| } |
| } |
| |
| @Nullable |
| Revision getBranchRevision() { |
| return branchRev; |
| } |
| |
| @Override |
| public Iterator<Revision> iterator() { |
| return revs.values().iterator(); |
| } |
| } |