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<?php

/**
 * This file is part of the Lean Mapper library (http://www.leanmapper.com)
 *
 * Copyright (c) 2013 Vojtěch Kohout (aka Tharos)
 *
 * For the full copyright and license information, please view the file
 * license-mit.txt that was distributed with this source code.
 */

namespace LeanMapper\Relationship;

/**
 * Base class for belongs to relationships
 *
 * @author Vojtěch Kohout
 */
abstract class BelongsTo
{

    /** @var string|null */
    private $columnReferencingSourceTable;

    /** @var string|null */
    private $targetTable;

    /** @var string */
    private $strategy;


    /**
     * @param string|null $columnReferencingSourceTable
     * @param string|null $targetTable
     * @param string $strategy
     */
    public function __construct($columnReferencingSourceTable, $targetTable, $strategy)
    {
        $this->columnReferencingSourceTable = $columnReferencingSourceTable;
        $this->targetTable = $targetTable;
        $this->strategy = $strategy;
    }

    /**
     * Gets name of column referencing source table
     *
     * @return string|null
     */
    public function getColumnReferencingSourceTable()
    {
        return $this->columnReferencingSourceTable;
    }

    /**
     * Gets name of target table
     *
     * @return string|null
     */
    public function getTargetTable()
    {
        return $this->targetTable;
    }

    /**
     * Gets strategy used to get referencing result
     *
     * @return string strategy
     */
    public function getStrategy()
    {
        return $this->strategy;
    }

}