| /* |
| * Copyright 2000-2014 JetBrains s.r.o. |
| * |
| * Licensed 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 com.intellij.util.text; |
| |
| import com.intellij.util.ReflectionUtil; |
| import org.jetbrains.annotations.NotNull; |
| import sun.reflect.ConstructorAccessor; |
| |
| import java.lang.reflect.Constructor; |
| |
| public class StringFactory { |
| // String(char[], boolean). Works since JDK1.7, earlier JDKs have too slow reflection anyway |
| private static final ConstructorAccessor ourConstructorAccessor; |
| |
| static { |
| ConstructorAccessor constructorAccessor = null; |
| try { |
| Constructor<String> newC = String.class.getDeclaredConstructor(char[].class, boolean.class); |
| constructorAccessor = ReflectionUtil.getConstructorAccessor(newC); |
| } |
| catch (Exception ignored) { |
| } |
| ourConstructorAccessor = constructorAccessor; |
| } |
| |
| |
| /** |
| * @return new instance of String which backed by 'chars' array. |
| * |
| * CAUTION. EXTREMELY DANGEROUS. |
| * DO NOT USE THIS METHOD UNLESS YOU ARE TOO DESPERATE |
| */ |
| @NotNull |
| public static String createShared(@NotNull char[] chars) { |
| if (ourConstructorAccessor != null) { |
| return ReflectionUtil.createInstanceViaConstructorAccessor(ourConstructorAccessor, chars, Boolean.TRUE); |
| } |
| return new String(chars); |
| } |
| } |