| /* |
| * 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.jetbrains.annotations.NotNull; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| /** |
| * A cache value wrapping a simple string. |
| */ |
| public final class StringValue implements CacheValue { |
| |
| private static final Logger log = LoggerFactory.getLogger(StringValue.class); |
| |
| private final String value; |
| |
| public StringValue(@NotNull String value) { |
| this.value = checkNotNull(value); |
| } |
| |
| @Override |
| public int getMemory() { |
| return getMemory(value); |
| } |
| |
| public static int getMemory(@NotNull String s) { |
| long size = 16 // shallow size |
| + 40 + (long)s.length() * 2; // value |
| 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 int hashCode() { |
| return value.hashCode(); |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (obj == this) { |
| return true; |
| } else if (obj instanceof StringValue) { |
| StringValue other = (StringValue) obj; |
| return value.equals(other.value); |
| } |
| return false; |
| } |
| |
| @Override |
| public String toString() { |
| return value; |
| } |
| |
| public String asString() { |
| return value; |
| } |
| |
| public static StringValue fromString(String value) { |
| return new StringValue(value); |
| } |
| |
| } |