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<?php
namespace Illuminate\Database\Query;
use Closure;
class JoinClause extends Builder
{
/**
* The type of join being performed.
*
* @var string
*/
public $type;
/**
* The table the join clause is joining to.
*
* @var string
*/
public $table;
/**
* The connection of the parent query builder.
*
* @var \Illuminate\Database\ConnectionInterface
*/
protected $parentConnection;
/**
* The grammar of the parent query builder.
*
* @var \Illuminate\Database\Query\Grammars\Grammar
*/
protected $parentGrammar;
/**
* The processor of the parent query builder.
*
* @var \Illuminate\Database\Query\Processors\Processor
*/
protected $parentProcessor;
/**
* The class name of the parent query builder.
*
* @var string
*/
protected $parentClass;
/**
* Create a new join clause instance.
*
* @param \Illuminate\Database\Query\Builder $parentQuery
* @param string $type
* @param string $table
* @return void
*/
public function __construct(Builder $parentQuery, $type, $table)
{
$this->type = $type;
$this->table = $table;
$this->parentClass = get_class($parentQuery);
$this->parentGrammar = $parentQuery->getGrammar();
$this->parentProcessor = $parentQuery->getProcessor();
$this->parentConnection = $parentQuery->getConnection();
parent::__construct(
$this->parentConnection, $this->parentGrammar, $this->parentProcessor
);
}
/**
* Add an "on" clause to the join.
*
* On clauses can be chained, e.g.
*
* $join->on('contacts.user_id', '=', 'users.id')
* ->on('contacts.info_id', '=', 'info.id')
*
* will produce the following SQL:
*
* on `contacts`.`user_id` = `users`.`id` and `contacts`.`info_id` = `info`.`id`
*
* @param \Closure|string $first
* @param string|null $operator
* @param \Illuminate\Database\Query\Expression|string|null $second
* @param string $boolean
* @return $this
*
* @throws \InvalidArgumentException
*/
public function on($first, $operator = null, $second = null, $boolean = 'and')
{
if ($first instanceof Closure) {
return $this->whereNested($first, $boolean);
}
return $this->whereColumn($first, $operator, $second, $boolean);
}
/**
* Add an "or on" clause to the join.
*
* @param \Closure|string $first
* @param string|null $operator
* @param string|null $second
* @return \Illuminate\Database\Query\JoinClause
*/
public function orOn($first, $operator = null, $second = null)
{
return $this->on($first, $operator, $second, 'or');
}
/**
* Get a new instance of the join clause builder.
*
* @return \Illuminate\Database\Query\JoinClause
*/
public function newQuery()
{
return new static($this->newParentQuery(), $this->type, $this->table);
}
/**
* Create a new query instance for sub-query.
*
* @return \Illuminate\Database\Query\Builder
*/
protected function forSubQuery()
{
return $this->newParentQuery()->newQuery();
}
/**
* Create a new parent query instance.
*
* @return \Illuminate\Database\Query\Builder
*/
protected function newParentQuery()
{
$class = $this->parentClass;
return new $class($this->parentConnection, $this->parentGrammar, $this->parentProcessor);
}
}