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A Speedment bundle that shades all dependencies into one jar. This is useful when deploying an application on a server.

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/*
 *
 * Copyright (c) 2006-2019, Speedment, Inc. All Rights Reserved.
 *
 * 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.speedment.runtime.field.internal.expression;

import com.speedment.runtime.compute.ToDouble;
import com.speedment.runtime.field.ReferenceField;
import com.speedment.runtime.field.expression.FieldToDouble;

import java.util.function.ToDoubleFunction;

/**
 * Default implementation of {@link FieldToDouble}.
 *
 * @author Emil Forslund
 * @since  3.1.0
 */
public final class FieldToDoubleImpl
extends AbstractFieldMapper, ToDoubleFunction>
implements FieldToDouble {

    public FieldToDoubleImpl(ReferenceField field,
                             ToDoubleFunction mapper) {
        super(field, mapper);
    }

    @Override
    public Double apply(ENTITY entity) {
        final V value = field.get(entity);
        if (value == null) return null;
        else return mapper.applyAsDouble(value);
    }

    @Override
    public double applyAsDouble(ENTITY object) throws NullPointerException {
        return mapper.applyAsDouble(field.get(object));
    }
}