jersey.repackaged.com.google.common.base.Platform Maven / Gradle / Ivy
/*
* Copyright (C) 2009 The Guava Authors
*
* 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 jersey.repackaged.com.google.common.base;
import jersey.repackaged.com.google.common.annotations.GwtCompatible;
import java.lang.ref.WeakReference;
/**
* 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 System#nanoTime()}. */
static long systemNanoTime() {
return System.nanoTime();
}
static CharMatcher precomputeCharMatcher(CharMatcher matcher) {
return matcher.precomputedInternal();
}
static > Optional getEnumIfPresent(Class enumClass, String value) {
WeakReference> ref = Enums.getEnumConstants(enumClass).get(value);
return ref == null
? Optional.absent()
: Optional.of(enumClass.cast(ref.get()));
}
}