135 lines
3.5 KiB
PHP
135 lines
3.5 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\DBAL\Query\Expression;
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/**
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* Composite expression is responsible to build a group of similar expression.
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*
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* @link www.doctrine-project.org
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* @since 2.1
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* @author Guilherme Blanco <guilhermeblanco@hotmail.com>
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* @author Benjamin Eberlei <kontakt@beberlei.de>
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*/
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class CompositeExpression implements \Countable
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{
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/**
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* Constant that represents an AND composite expression.
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*/
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const TYPE_AND = 'AND';
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/**
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* Constant that represents an OR composite expression.
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*/
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const TYPE_OR = 'OR';
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/**
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* The instance type of composite expression.
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*
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* @var string
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*/
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private $type;
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/**
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* Each expression part of the composite expression.
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*
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* @var array
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*/
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private $parts = array();
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/**
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* Constructor.
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*
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* @param string $type Instance type of composite expression.
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* @param array $parts Composition of expressions to be joined on composite expression.
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*/
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public function __construct($type, array $parts = array())
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{
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$this->type = $type;
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$this->addMultiple($parts);
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}
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/**
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* Adds multiple parts to composite expression.
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*
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* @param array $parts
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*
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* @return \Doctrine\DBAL\Query\Expression\CompositeExpression
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*/
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public function addMultiple(array $parts = array())
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{
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foreach ((array) $parts as $part) {
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$this->add($part);
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}
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return $this;
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}
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/**
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* Adds an expression to composite expression.
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*
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* @param mixed $part
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*
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* @return \Doctrine\DBAL\Query\Expression\CompositeExpression
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*/
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public function add($part)
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{
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if ( ! empty($part) || ($part instanceof self && $part->count() > 0)) {
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$this->parts[] = $part;
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}
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return $this;
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}
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/**
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* Retrieves the amount of expressions on composite expression.
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*
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* @return integer
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*/
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public function count()
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{
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return count($this->parts);
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}
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/**
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* Retrieves the string representation of this composite expression.
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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 (count($this->parts) === 1) {
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return (string) $this->parts[0];
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}
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return '(' . implode(') ' . $this->type . ' (', $this->parts) . ')';
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}
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/**
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* Returns the type of this composite expression (AND/OR).
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*
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* @return string
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*/
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public function getType()
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{
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return $this->type;
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}
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}
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