1 /* 2 * Copyright 2017 Google Inc. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * https://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package trebuchet.util 18 19 import trebuchet.io.DataSlice 20 import java.util.concurrent.ConcurrentHashMap 21 22 class StringCache { 23 // we're gonna have a lot of strings probably 24 private val cache: MutableMap<DataSlice, String> = HashMap(1_000) 25 stringFornull26 fun stringFor(slice: DataSlice): String { 27 var ret = cache[slice] 28 if (ret == null) { 29 ret = slice.toString() 30 cache.putIfAbsent(slice.compact(), ret) 31 } 32 return ret 33 } 34 }