com.google.common.base.Platform Maven / Gradle / Ivy
/*
* Copyright (C) 2009 Google Inc.
*
* 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.google.common.base;
import com.google.common.annotations.GwtCompatible;
/**
* Methods factored out so that they can be emulated differently in GWT.
*
* @author Jesse Wilson
*/
@GwtCompatible(emulated = true)
final class Platform {
private Platform() {}
/**
* Calls {@link Class#isInstance(Object)}.
*
* This method is not supported in GWT yet.
*/
static boolean isInstance(Class clazz, Object obj) {
return clazz.isInstance(obj);
}
/** Returns a thread-local 1024-char array. */
static char[] charBufferFromThreadLocal() {
return DEST_TL.get();
}
/** Calls {@link System#nanoTime()}. */
static long systemNanoTime() {
return System.nanoTime();
}
/**
* A thread-local destination buffer to keep us from creating new buffers.
* The starting size is 1024 characters. If we grow past this we don't
* put it back in the threadlocal, we just keep going and grow as needed.
*/
private static final ThreadLocal DEST_TL = new ThreadLocal() {
@Override
protected char[] initialValue() {
return new char[1024];
}
};
static CharMatcher precomputeCharMatcher(CharMatcher matcher) {
return matcher.precomputedInternal();
}
}