| /* |
| * 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.version; |
| |
| import javax.jcr.RepositoryException; |
| |
| import org.apache.jackrabbit.JcrConstants; |
| import org.apache.jackrabbit.oak.api.Type; |
| import org.apache.jackrabbit.oak.spi.state.NodeBuilder; |
| import org.apache.jackrabbit.util.ISO8601; |
| import org.jetbrains.annotations.NotNull; |
| |
| /** |
| * <i>Inspired by Jackrabbit 2.x</i> |
| * <p> |
| * This Class implements a version selector that selects a version by creation |
| * date. The selected version is the latest that is older or equal than the |
| * given date. If no version could be found {@code null} is returned |
| * unless the {@code returnLatest} flag is set to {@code true}, where |
| * the latest version is returned. |
| * <pre> |
| * V1.0 - 02-Sep-2006 |
| * V1.1 - 03-Sep-2006 |
| * V1.2 - 05-Sep-2006 |
| * |
| * new DateVersionSelector("03-Sep-2006").select() -> V1.1 |
| * new DateVersionSelector("04-Sep-2006").select() -> V1.1 |
| * new DateVersionSelector("01-Sep-2006").select() -> null |
| * new DateVersionSelector("01-Sep-2006", true).select() -> V1.2 |
| * new DateVersionSelector(null, true).select() -> V1.2 |
| * </pre> |
| */ |
| class DateVersionSelector implements VersionSelector { |
| |
| /** |
| * a version date hint |
| */ |
| private final long timestamp; |
| |
| /** |
| * Creates a {@code DateVersionSelector} that will select the latest |
| * version of all those that are older than the given timestamp. |
| * |
| * @param timestamp reference timestamp |
| */ |
| public DateVersionSelector(String timestamp) { |
| this.timestamp = ISO8601.parse(timestamp).getTimeInMillis(); |
| } |
| |
| @Override |
| public NodeBuilder select(@NotNull NodeBuilder history) |
| throws RepositoryException { |
| long latestDate = Long.MIN_VALUE; |
| NodeBuilder latestVersion = null; |
| for (String name: history.getChildNodeNames()) { |
| // OAK-1192 skip hidden child nodes |
| if (name.charAt(0) == ':') { |
| continue; |
| } |
| NodeBuilder v = history.getChildNode(name); |
| if (name.equals(JcrConstants.JCR_ROOTVERSION) |
| || name.equals(JcrConstants.JCR_VERSIONLABELS)) { |
| // ignore root version and labels node |
| continue; |
| } |
| long c = ISO8601.parse(v.getProperty(JcrConstants.JCR_CREATED).getValue(Type.DATE)).getTimeInMillis(); |
| if (c > latestDate && c <= timestamp) { |
| latestDate = c; |
| latestVersion = v; |
| } else if (c == latestDate) { |
| throw new RepositoryException("two versions share the same jcr:created timestamp in history:" + history); |
| } |
| } |
| return latestVersion; |
| } |
| } |