/*
 * Copyright (c) 2022-2023 nosqlbench
 *
 * 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 io.nosqlbench.virtdata.library.basics.shared.from_double.to_double;

import io.nosqlbench.virtdata.api.annotations.Categories;
import io.nosqlbench.virtdata.api.annotations.Category;
import io.nosqlbench.virtdata.api.annotations.ThreadSafeMapper;
import io.nosqlbench.virtdata.api.bindings.VirtDataConversions;

import java.util.List;
import java.util.function.LongToDoubleFunction;

/**
 * Compute the sum of a set of functions.
 */
@ThreadSafeMapper
@Categories({Category.general})
public class SumFunctions implements LongToDoubleFunction {

    private final List<LongToDoubleFunction> functions;
    public SumFunctions(Object... funcs) {
        this.functions = VirtDataConversions.adaptFunctionList(funcs, LongToDoubleFunction.class);
    }

    @Override
    public double applyAsDouble(long value) {
        double sum = 0.0d;
        for (LongToDoubleFunction function : functions) {
            sum+=function.applyAsDouble(value);
        }
        return sum;
    }
}
