| /* |
| * 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.util; |
| |
| import org.apache.jackrabbit.oak.cache.CacheValue; |
| import org.apache.jackrabbit.oak.plugins.document.Revision; |
| import org.apache.jackrabbit.oak.plugins.document.RevisionVector; |
| import org.jetbrains.annotations.NotNull; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * A cache key implementation which consists of two {@link Revision}s. |
| */ |
| public final class RevisionsKey implements CacheValue, Comparable<RevisionsKey> { |
| |
| private static final Logger log = LoggerFactory.getLogger(RevisionsKey.class); |
| |
| private final RevisionVector r1, r2; |
| |
| public RevisionsKey(RevisionVector r1, RevisionVector r2) { |
| this.r1 = checkNotNull(r1); |
| this.r2 = checkNotNull(r2); |
| } |
| |
| public RevisionVector getRev1() { |
| return r1; |
| } |
| |
| public RevisionVector getRev2() { |
| return r2; |
| } |
| |
| @Override |
| public int getMemory() { |
| long size = 32 + (long)r1.getMemory() + (long)r2.getMemory(); |
| if (size > Integer.MAX_VALUE) { |
| log.debug("Estimated memory footprint larger than Integer.MAX_VALUE: {}.", size); |
| size = Integer.MAX_VALUE; |
| } |
| return (int) size; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (!(obj instanceof RevisionsKey)) { |
| return false; |
| } |
| RevisionsKey other = (RevisionsKey) obj; |
| return r1.equals(other.r1) && r2.equals(other.r2); |
| } |
| |
| @Override |
| public int hashCode() { |
| return r1.hashCode() ^ r2.hashCode(); |
| } |
| |
| @Override |
| public String toString() { |
| return asString(); |
| } |
| |
| public String asString() { |
| return r1 + "/" + r2; |
| } |
| |
| public int compareTo(@NotNull RevisionsKey k) { |
| int c = r1.compareTo(k.r1); |
| if (c != 0) { |
| return c; |
| } |
| return r2.compareTo(k.r2); |
| } |
| |
| public static RevisionsKey fromString(String s) { |
| int idx = s.indexOf('/'); |
| if (idx == -1) { |
| throw new IllegalArgumentException(s); |
| } |
| return new RevisionsKey( |
| RevisionVector.fromString(s.substring(0, idx)), |
| RevisionVector.fromString(s.substring(idx + 1))); |
| } |
| } |