1 /* 2 * Copyright (C) 2009 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 * http://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 com.google.android.mail.common.base; 18 19 20 /** 21 * Methods factored out so that they can be emulated differently in GWT. 22 * 23 * @author Jesse Wilson 24 */ 25 final class Platform { 26 private Platform() {} 27 28 /** 29 * Calls {@link Class#isInstance(Object)}. 30 * 31 * <p>This method is not supported in GWT yet. 32 */ 33 static boolean isInstance(Class<?> clazz, Object obj) { 34 return clazz.isInstance(obj); 35 } 36 37 /** Returns a thread-local 1024-char array. */ 38 static char[] charBufferFromThreadLocal() { 39 return DEST_TL.get(); 40 } 41 42 /** 43 * A thread-local destination buffer to keep us from creating new buffers. 44 * The starting size is 1024 characters. If we grow past this we don't 45 * put it back in the threadlocal, we just keep going and grow as needed. 46 */ 47 private static final ThreadLocal<char[]> DEST_TL = new ThreadLocal<char[]>() { 48 @Override 49 protected char[] initialValue() { 50 return new char[1024]; 51 } 52 }; 53 54 static CharMatcher precomputeCharMatcher(CharMatcher matcher) { 55 return matcher.precomputedInternal(); 56 } 57 } 58
