/**
* Parse the expression
*
* @see library/ODataProducer/QueryProcessor/ODataProducer\QueryProcessor.
* ExpressionParser::parseFilter()
*
* @return AbstractExpression
*
* @throws ODataException
*/
public function parseFilter()
{
$expression = parent::parseFilter();
if (!$expression->typeIs(new Boolean())) {
ODataException::createSyntaxError(Messages::expressionParser2BooleanRequired());
}
if (!$this->_isCustomExpressionProvider) {
$resultExpression = $this->_processNodeForNullability($expression, null);
if ($resultExpression != null) {
return $resultExpression;
}
}
return $expression;
}
public function testFunctionCallExpression()
{
try {
$expression = 'year(datetime\'1988-11-11\')';
$parser = new ExpressionParser($expression, $this->_northWindMetadata->resolveResourceSet('Customers')->getResourceType(), false);
$expr = $parser->parseFilter();
$this->AssertEquals($expr instanceof FunctionCallExpression, true);
$this->AssertEquals($expr->getType() instanceof Int32, true);
$expression = "substring('pspl', 1) eq 'pl'";
$parser->resetParser($expression);
$expr = $parser->parseFilter();
$this->AssertEquals($expr instanceof RelationalExpression, true);
$this->AssertEquals($expr->getLeft() instanceof FunctionCallExpression, true);
$this->AssertEquals($expr->getLeft()->getFunctionDescription()->functionName, 'strcmp');
$paramExpressions = $expr->getLeft()->getParamExpressions();
$this->AssertEquals(count($paramExpressions), 2);
$this->AssertEquals($paramExpressions[0] instanceof FunctionCallExpression, true);
$this->AssertEquals($paramExpressions[0]->getFunctionDescription()->functionName, 'substring');
$paramExpressions1 = $paramExpressions[0]->getParamExpressions();
$this->AssertEquals(count($paramExpressions1), 2);
$this->AssertEquals($paramExpressions1[0] instanceof ConstantExpression, true);
$this->AssertEquals($paramExpressions1[0]->getValue(), '\'pspl\'');
$exceptionThrown = false;
try {
$expression = 'unknownFun(1, 3)';
$parser->resetParser($expression);
$expr = $parser->parseFilter();
} catch (ODataException $exception) {
$this->assertStringStartsWith('Unknown function \'unknownFun\' at position 0', $exception->getMessage());
$exceptionThrown = true;
}
if (!$exceptionThrown) {
$this->fail('An expected ODataException for and unknown function was not thrown');
}
$exceptionThrown = false;
try {
$expression = 'endswith(\'mystring\'';
$parser->resetParser($expression);
$expr = $parser->parseFilter();
} catch (ODataException $exception) {
$this->assertStringStartsWith('Close parenthesis expected', $exception->getMessage());
$exceptionThrown = true;
}
if (!$exceptionThrown) {
$this->fail('An expected ODataException for function without closing bracket was not thrown');
}
$exceptionThrown = false;
try {
$expression = 'trim()';
$parser->resetParser($expression);
$expr = $parser->parseFilter();
} catch (ODataException $exception) {
$this->assertStringStartsWith('No applicable function found for \'trim\' at position 0 with the specified arguments. The functions considered are: Edm.String trim(Edm.String)', $exception->getMessage());
$exceptionThrown = true;
}
if (!$exceptionThrown) {
$this->fail('An expected ODataException for \'No applicable function found\' was not thrown for trim');
}
$exceptionThrown = false;
try {
$expression = 'month(123.4)';
$parser->resetParser($expression);
$expr = $parser->parseFilter();
} catch (ODataException $exception) {
$this->assertStringStartsWith('No applicable function found for \'month\' at position', $exception->getMessage());
$exceptionThrown = true;
}
if (!$exceptionThrown) {
$this->fail('An expected ODataException for \'No applicable function found\' was not thrown for month');
}
} catch (ODataException $exception) {
$this->fail('An unexpected ODataException has been raised');
}
}