com.google.gwt.core.client.Duration Maven / Gradle / Ivy
/*
* Copyright 2008 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.gwt.core.client;
/**
* A utility class for measuring elapsed time.
*/
public class Duration {
/**
* Returns the same result as {@link System#currentTimeMillis()}, but as a
* double. Because emulated long math is significantly slower than doubles in
* Production Mode, this method is to be preferred.
*/
public static native double currentTimeMillis() /*-{
return (new Date()).getTime();
}-*/;
private static native int uncheckedConversion(double elapsed) /*-{
return elapsed;
}-*/;
private double start = currentTimeMillis();
/**
* Creates a new Duration whose start time is now.
*/
public Duration() {
}
/**
* Returns the number of milliseconds that have elapsed since this object was
* created.
*/
public int elapsedMillis() {
return uncheckedConversion(currentTimeMillis() - start);
}
/**
* Returns the time when the object was created.
*/
public double getStartMillis() {
return start;
}
}