public function resolve()
{
$lastIndex = count($this->chain) - 1;
do {
$this->chain = array_values($this->chain);
foreach ($this->chain as $index => $chainValue) {
if ($chainValue instanceof ConditionJob) {
if (!$chainValue->hasLastParameter() && $index < $lastIndex) {
$parameter = $this->chain[$index + 1];
unset($this->chain[$index + 1]);
$chainValue->setLastParameter($parameter);
continue 2;
}
if (!$chainValue->hasFirstParameter() && $index > 0) {
$parameter = $this->chain[$index - 1];
unset($this->chain[$index - 1]);
$chainValue->setFirstParameter($parameter);
continue 2;
}
}
if ($chainValue instanceof Part) {
$chainValue->resolve();
}
}
break;
} while (true);
parent::resolve();
}
public function resolve()
{
if ($this->firstParameter instanceof Part) {
$this->firstParameter->resolve();
}
if ($this->lastParameter instanceof Part) {
$this->lastParameter->resolve();
}
parent::resolve();
}
/**
* Extracts part(s) of a (complicated) condition that map a column of the given table directly to a fixed value.
* (E.g.: "(foo.a > bar.b && baz.c = 1) && (far.d = faz.e || far.f = 3)" results in "baz.c = 1" for table "baz")
*
* Only considers the parts that can directly negate the condition result (those liked with AND operators).
*
* @param ValuePart $condition
* @return array (array of ValuePart)
*/
protected function findFixedConditions(Part $condition)
{
$tableConditions = array();
if ($condition instanceof ValuePart) {
foreach ($condition->getChainValues() as $chainValue) {
if ($chainValue instanceof Part) {
$tableConditions = array_merge($tableConditions, $this->findFixedConditions($chainValue));
}
}
} elseif ($condition instanceof ConditionJob) {
/* @var $condition ConditionJob */
if ($condition->getOperator() === Operator::OP_AND()) {
foreach ([$condition->getFirstParameter(), $condition->getLastParameter()] as $conditionParameter) {
if ($conditionParameter instanceof Part) {
$tableConditions = array_merge($tableConditions, $this->findFixedConditions($conditionParameter));
}
}
} elseif (in_array($condition->getOperator(), [Operator::OP_EQUAL(), Operator::OP_EQUAL_NULLSAFE(), Operator::OP_NOT_EQUAL(), Operator::OP_GREATER(), Operator::OP_GREATEREQUAL(), Operator::OP_LESSER(), Operator::OP_LESSEREQUAL(), Operator::OP_BETWEEN(), Operator::OP_NOT_BETWEEN()])) {
$column = $condition->getFirstParameter();
$fixedValue = $condition->getLastParameter();
if ($fixedValue instanceof ColumnSpecifier) {
list($column, $fixedValue) = [$fixedValue, $column];
}
if ($column instanceof ColumnSpecifier && $this->isFixedValue($fixedValue)) {
$tableConditions[] = $condition;
}
}
}
return $tableConditions;
}