com.netflix.spectator.api.DoubleFunction Maven / Gradle / Ivy
/*
* Copyright 2014-2019 Netflix, 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.netflix.spectator.api;
import java.util.function.ToDoubleFunction;
/**
* Function to extract a double value from an object.
*/
public abstract class DoubleFunction implements ToDoubleFunction {
@Override public double applyAsDouble(T n) {
return apply(n.doubleValue());
}
/**
* Apply a transform to the value `v`.
*
* @param v
* Double value to transform.
* @return
* Result of applying this function to `v`.
*/
public abstract double apply(double v);
}