You can attach {@link ExpressionVisitor} instances to the traverse which
will be invoked for every node of the expression tree.
/**
* @param Expression[] $expressions
* @param string $class
*
* @return \Doctrine\ORM\QueryBuilder
*
* @throws \Exception
*/
public function toQueryBuilder(array $expressions, $class)
{
$expr = $this->buildExpression($expressions);
$qb = $this->em->getRepository($class)->createQueryBuilder('a');
$traverser = new ExpressionTraverser();
$traverser->addVisitor(new QueryBuilderVisitor($qb));
$traverser->traverse($expr);
return $qb;
}
/**
* Builds a {@link BindingDescriptor} expression for a given
* {@link AssetMapping} expression.
*
* @param Expression|null $expr The {@link AssetMapping} expression.
*
* @return Expression The built expression.
*/
public function buildExpression(Expression $expr = null)
{
if (!$this->defaultExpression) {
$this->defaultExpression = Expr::method('isEnabled', Expr::same(true))->andMethod('getTypeName', Expr::same(DiscoveryUrlGenerator::BINDING_TYPE))->andMethod('getBinding', Expr::method('getQuery', Expr::endsWith('{,/**/*}')));
}
if (!$expr) {
return $this->defaultExpression;
}
$traverser = new ExpressionTraverser();
$traverser->addVisitor($this);
return $this->defaultExpression->andX($traverser->traverse($expr));
}
/**
* Builds a {@link BindingDescriptor} expression for a given
* {@link AssetMapping} expression.
*
* @param Expression $expr The {@link AssetMapping} expression.
*
* @return Expression The built expression.
*/
public function buildExpression(Expression $expr = null)
{
if (!$this->defaultExpression) {
$this->defaultExpression = Expr::same(BindingState::ENABLED, BindingDescriptor::STATE)->andSame(DiscoveryUrlGenerator::BINDING_TYPE, BindingDescriptor::TYPE_NAME)->andEndsWith('{,/**/*}', BindingDescriptor::QUERY);
}
if (!$expr) {
return $this->defaultExpression;
}
$traverser = new ExpressionTraverser();
$traverser->addVisitor($this);
return $this->defaultExpression->andX($traverser->traverse($expr));
}
public function testRemoveAllDisjuncts()
{
$expr1 = new OrX(array($gt1 = new GreaterThan(10), $same = new Same('5')));
$visitor = $this->getMock('Webmozart\\Expression\\Traversal\\ExpressionVisitor');
$visitor->expects($this->at(0))->method('enterExpression')->with($this->identicalTo($expr1))->willReturn($expr1);
$visitor->expects($this->at(1))->method('enterExpression')->with($this->identicalTo($gt1))->willReturn($gt1);
$visitor->expects($this->at(2))->method('leaveExpression')->with($this->identicalTo($gt1))->willReturn(null);
$visitor->expects($this->at(3))->method('enterExpression')->with($this->identicalTo($same))->willReturn($same);
$visitor->expects($this->at(4))->method('leaveExpression')->with($this->identicalTo($same))->willReturn(null);
$this->traverser->addVisitor($visitor);
$this->assertNull($this->traverser->traverse($expr1));
}
