125 lines
3.1 KiB
PHP
125 lines
3.1 KiB
PHP
<?php
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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 MIT license. 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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* @link www.doctrine-project.org
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* @since 2.0
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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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/**
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* @var string
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*/
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protected $preSeparator = '(';
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/**
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* @var string
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*/
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protected $separator = ', ';
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/**
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* @var string
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*/
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protected $postSeparator = ')';
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/**
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* @var array
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*/
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protected $allowedClasses = array();
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/**
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* @var array
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*/
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protected $parts = array();
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/**
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* @param array $args
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*/
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public function __construct($args = array())
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{
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$this->addMultiple($args);
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}
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/**
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* @param array $args
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*
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* @return Base
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*/
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public function addMultiple($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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/**
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* @param mixed $arg
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*
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* @return Base
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*
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* @throws \InvalidArgumentException
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*/
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public function add($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 $this;
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}
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/**
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* @return integer
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*/
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public function count()
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{
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return count($this->parts);
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}
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/**
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* @return string
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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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