com.speedment.runtime.field.internal.collector.FieldCollectorImpl Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of runtime-field Show documentation

Partly generated model of the fields that represent columns in the database. Fields can be used to produce special predicates and functions that contain metadata that Speedment can analyze runtime.

There is a newer version: 3.2.10

Show newest version

/**
 *
 * Copyright (c) 2006-2017, 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.collector;

import com.speedment.runtime.field.Field;
import com.speedment.runtime.field.collector.FieldCollector;
import static java.util.Objects.requireNonNull;
import java.util.Set;
import java.util.function.BiConsumer;
import java.util.function.BinaryOperator;
import java.util.function.Function;
import java.util.function.Supplier;
import java.util.stream.Collector;

/**
 *
 * @param   the entity type to be collected
 * @param   the intermediate accumulation type of the downstream collector
 * @param   the collected result
 * 
 * @author Emil Forslund
 * @since  3.0.2
 */
public final class FieldCollectorImpl
implements FieldCollector  {

    private final Field field;
    private final Supplier supplier;
    private final BiConsumer accumulator;
    private final BinaryOperator combiner;
    private final Function finisher;
    private final Set characteristics;

    public FieldCollectorImpl(
                Field field,
                Supplier supplier,
                BiConsumer accumulator,
                BinaryOperator combiner,
                Function finisher,
                Set characteristics) {
        
        this.field           = requireNonNull(field);
        this.supplier        = requireNonNull(supplier);
        this.accumulator     = requireNonNull(accumulator);
        this.combiner        = requireNonNull(combiner);
        this.finisher        = requireNonNull(finisher);
        this.characteristics = requireNonNull(characteristics);
    }

    public FieldCollectorImpl(
            Field field,
            Supplier supplier,
            BiConsumer accumulator,
            BinaryOperator combiner,
            Set characteristics) {
        
        this(field, supplier, accumulator, combiner, castingIdentity(), characteristics);
    }
    
    @Override
    public Field getField() {
        return field;
    }

    @Override
    public BiConsumer accumulator() {
        return accumulator;
    }

    @Override
    public Supplier supplier() {
        return supplier;
    }

    @Override
    public BinaryOperator combiner() {
        return combiner;
    }

    @Override
    public Function finisher() {
        return finisher;
    }

    @Override
    public Set characteristics() {
        return characteristics;
    }
    
    @SuppressWarnings("unchecked")
    private static  Function castingIdentity() {
        return i -> (R) i;
    }
}