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<?php
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/*
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 *  $Id: UniqueValidator.php 1262 2009-10-26 20:54:39Z francois $
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 *
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 * This software consists of voluntary contributions made by many individuals
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 * and is licensed under the LGPL. For more information please see
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 * <http://propel.phpdb.org>.
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 */
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/**
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 * A validator for unique column names.
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 *
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 * <code>
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 *   <column name="username" type="VARCHAR" size="25" required="true" />
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 *
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 *   <validator column="username">
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 *     <rule name="unique" message="Username already exists !" />
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 *   </validator>
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 * </code>
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 *
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 * @author     Michael Aichler <aichler@mediacluster.de>
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 * @version    $Revision: 1262 $
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 * @package    propel.validator
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 */
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class UniqueValidator implements BasicValidator
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{
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	/**
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	 * @see        BasicValidator::isValid()
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	 */
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	public function isValid (ValidatorMap $map, $str)
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	{
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		$column = $map->getColumn();
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		$c = new Criteria();
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		$c->add($column->getFullyQualifiedName(), $str, Criteria::EQUAL);
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		$table = $column->getTable()->getClassName();
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		$clazz = $table . 'Peer';
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		$count = call_user_func(array($clazz, 'doCount'), $c);
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		$isValid = ($count === 0);
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		return $isValid;
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	}
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}