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 }