Matches the values with the supplied values according to the supplied filter
then maps the results into as according to the supplied function.
/**
* @dataProvider theImplementations
*/
public function testThatExecutionIsDeferred(\Pinq\ITraversable $traversable, array $data)
{
$this->assertThatExecutionIsDeferred(function (callable $function) use($traversable) {
return $traversable->join([])->on($function)->to($function);
});
$this->assertThatExecutionIsDeferred(function (callable $function) use($traversable) {
return $traversable->join([])->onEquality($function, $function)->to($function);
});
}
/**
* Evaluates the join segment values and filter upon the supplied traversable.
*
* @param ITraversable $traversable
* @param Common\Join\Options $join
* @param Queries\IResolvedParameterRegistry $resolvedParameters
*
* @return \Pinq\Interfaces\IJoiningToTraversable
*/
public static function evaluateJoinOptions(ITraversable $traversable, Common\Join\Options $join, Queries\IResolvedParameterRegistry $resolvedParameters)
{
$values = self::evaluateSource($join->getSource(), $resolvedParameters);
$joiningTraversable = $join->isGroupJoin() ? $traversable->groupJoin($values) : $traversable->join($values);
if ($join->hasFilter()) {
$filter = $join->getFilter();
if ($filter instanceof Common\Join\Filter\Custom) {
$joiningTraversable = $joiningTraversable->on($resolvedParameters[$filter->getOnFunction()->getCallableId()]);
} elseif ($filter instanceof Common\Join\Filter\Equality) {
$joiningTraversable = $joiningTraversable->onEquality($resolvedParameters[$filter->getOuterKeyFunction()->getCallableId()], $resolvedParameters[$filter->getInnerKeyFunction()->getCallableId()]);
}
}
if ($join->hasDefault()) {
$joiningTraversable = $joiningTraversable->withDefault($resolvedParameters[$join->getDefaultValueId()], $resolvedParameters[$join->getDefaultKeyId()]);
}
return $joiningTraversable;
}
