90 lines
2.7 KiB
PHP
90 lines
2.7 KiB
PHP
<?php
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/*
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* $Id$
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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, see
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* <http://www.doctrine-project.org>.
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*/
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namespace Doctrine\ORM\Query\Expr;
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/**
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* Abstract base Expr class for building DQL parts
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*
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link www.doctrine-project.org
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* @since 2.0
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* @version $Revision$
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* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
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* @author Jonathan Wage <jonwage@gmail.com>
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* @author Roman Borschel <roman@code-factory.org>
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*/
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abstract class Base
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{
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protected $_preSeparator = '(';
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protected $_separator = ', ';
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protected $_postSeparator = ')';
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protected $_allowedClasses = array();
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protected $_parts = array();
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public function __construct($args = array())
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{
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$this->addMultiple($args);
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}
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public function addMultiple($args = array())
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{
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foreach ((array) $args as $arg) {
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$this->add($arg);
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}
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return $this;
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}
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public function add($arg)
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{
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if ( $arg !== null || ($arg instanceof self && $arg->count() > 0)) {
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// If we decide to keep Expr\Base instances, we can use this check
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if ( ! is_string($arg)) {
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$class = get_class($arg);
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if ( ! in_array($class, $this->_allowedClasses)) {
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throw new \InvalidArgumentException("Expression of type '$class' not allowed in this context.");
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}
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}
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$this->_parts[] = $arg;
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}
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return $this;
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}
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public function count()
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{
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return count($this->_parts);
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}
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public function __toString()
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{
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if ($this->count() == 1) {
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return (string) $this->_parts[0];
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}
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return $this->_preSeparator . implode($this->_separator, $this->_parts) . $this->_postSeparator;
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}
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}
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