/**
 * Copyright (C) 2010-14 diirt developers. See COPYRIGHT.TXT
 * All rights reserved. Use is subject to license terms. See LICENSE.TXT
 */
package org.diirt.datasource.expression;

import org.diirt.datasource.PVDirector;
import org.diirt.datasource.PVWriterDirector;
import org.diirt.datasource.ReadFunction;
import org.diirt.datasource.ReadRecipeBuilder;
import org.diirt.datasource.WriteFunction;
import org.diirt.datasource.WriteRecipeBuilder;

/**
 * Implementation class for {@link DesiredRateReadWriteExpression}.
 *
 * @param <R> type of the read payload
 * @param <W> type of the write payload
 * @author carcassi
 */
public class DesiredRateReadWriteExpressionImpl<R, W> extends DesiredRateReadWriteExpressionListImpl<R, W> implements DesiredRateReadWriteExpression<R, W> {

    private final DesiredRateExpression<R> desiredRateExpression;
    private final WriteExpression<W> writeExpression;

    {
        // Make sure that the list includes this expression
        addThis();
    }

    @Override
    public final DesiredRateReadWriteExpressionImpl<R, W> as(String name) {
        desiredRateExpression.as(name);
        writeExpression.getWriteExpressionImpl().as(name);
        return this;
    }

    /**
     * Creates an expression that can be both read at the desired rate and written.
     *
     * @param desiredRateExpression the read part of the expression
     * @param writeExpression the write part of the expression
     */
    public DesiredRateReadWriteExpressionImpl(DesiredRateExpression<R> desiredRateExpression, WriteExpression<W> writeExpression) {
        this.desiredRateExpression = desiredRateExpression;
        this.writeExpression = writeExpression;
    }

    @Override
    public final String getName() {
        return desiredRateExpression.getName();
    }

    @Override
    public final ReadFunction<R> getFunction() {
        return desiredRateExpression.getFunction();
    }

    @Override
    public final DesiredRateExpressionImpl<R> getDesiredRateExpressionImpl() {
        return desiredRateExpression.getDesiredRateExpressionImpl();
    }

    @Override
    public final WriteExpressionImpl<W> getWriteExpressionImpl() {
        return writeExpression.getWriteExpressionImpl();
    }

    @Override
    public void fillReadRecipe(PVDirector director, ReadRecipeBuilder builder) {
        desiredRateExpression.fillReadRecipe(director, builder);
    }

    @Override
    public final WriteFunction<W> getWriteFunction() {
        return writeExpression.getWriteFunction();
    }

    @Override
    public void fillWriteRecipe(PVWriterDirector director, WriteRecipeBuilder builder) {
        writeExpression.fillWriteRecipe(director, builder);
    }

}