/*
 * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
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 *
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package java.util.functions;

/**
 * Given an input object maps to an appropriate {@code double} value; this is
 * the {@code double}-bearing specialization for {@link Mapper}.
 *
 * @param <T> the type of input objects provided to the {@code map} operation.
 *
 * @since  1.8
 */
public interface DoubleMapper<T> {

    /**
     * Map the provided input object to an appropriate {@code double} value.
     *
     * @param t the input object to be mapped.
     * @return the mapped output value.
     */
    double map(T t);
}