com.netflix.spectator.api.ValueFunction Maven / Gradle / Ivy
/**
* Copyright 2015 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.
*
* @deprecated Use {@link ToDoubleFunction} instead.
*/
@Deprecated
public interface ValueFunction extends ToDoubleFunction {
/**
* Returns a double value based on the object {@code ref}.
*
* @param ref
* An object to use for extracting the value.
* @return
* Double value based on the object.
*/
double apply(T ref);
@Override default double applyAsDouble(T ref) {
return apply(ref);
}
}