<?php
/*
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the MIT license. For more information, see
 * <http://www.doctrine-project.org>.
 */

namespace Doctrine\DBAL\Schema;

use Doctrine\DBAL\Platforms\AbstractPlatform;

/**
 * Marker interface for constraints.
 *
 * @link   www.doctrine-project.org
 * @since  2.0
 * @author Benjamin Eberlei <kontakt@beberlei.de>
 */
interface Constraint
{
    /**
     * @return string
     */
    public function getName();

    /**
     * @param \Doctrine\DBAL\Platforms\AbstractPlatform $platform
     *
     * @return string
     */
    public function getQuotedName(AbstractPlatform $platform);

    /**
     * Returns the names of the referencing table columns
     * the constraint is associated with.
     *
     * @return array
     */
    public function getColumns();

    /**
     * Returns the quoted representation of the column names
     * the constraint is associated with.
     *
     * But only if they were defined with one or a column name
     * is a keyword reserved by the platform.
     * Otherwise the plain unquoted value as inserted is returned.
     *
     * @param \Doctrine\DBAL\Platforms\AbstractPlatform $platform The platform to use for quotation.
     *
     * @return array
     */
    public function getQuotedColumns(AbstractPlatform $platform);
}