/**
* Will generate the code used before the original function body
*
* @param bool $injectNeeded Determine if we have to use a try...catch block
* @param FunctionDefinition $functionDefinition The function definition object
*
* @return string
*/
protected function generateBeforeCode($injectNeeded, FunctionDefinition $functionDefinition)
{
$suffix = PBC_ORIGINAL_FUNCTION_SUFFIX . str_replace('.', '', microtime(true));
$code = PBC_CONTRACT_CONTEXT . ' = \\TechDivision\\PBC\\ContractContext::open();';
// Invariant is not needed in private or static functions.
// Also make sure that there is none in front of the constructor check
if ($functionDefinition->getVisibility() !== 'private' && !$functionDefinition->getIsStatic() && $functionDefinition->getName() !== '__construct') {
$code .= PBC_INVARIANT_PLACEHOLDER . PBC_PLACEHOLDER_CLOSE;
}
$code .= PBC_PRECONDITION_PLACEHOLDER . $functionDefinition->getName() . PBC_PLACEHOLDER_CLOSE . PBC_OLD_SETUP_PLACEHOLDER . $functionDefinition->getName() . PBC_PLACEHOLDER_CLOSE;
// If we inject something we might need a try ... catch around the original call.
if ($injectNeeded === true) {
$code .= 'try {';
}
// Build up the call to the original function.
$code .= PBC_KEYWORD_RESULT . ' = ' . $functionDefinition->getHeader('call', $suffix) . ';';
// Finish the try ... catch and place the inject marker
if ($injectNeeded === true) {
$code .= '} catch (\\Exception $e) {}' . PBC_METHOD_INJECT_PLACEHOLDER . $functionDefinition->getName() . PBC_PLACEHOLDER_CLOSE;
}
// No just place all the other placeholder for other filters to come
$code .= PBC_POSTCONDITION_PLACEHOLDER . $functionDefinition->getName() . PBC_PLACEHOLDER_CLOSE;
// Invariant is not needed in private or static functions
if ($functionDefinition->getVisibility() !== 'private' && !$functionDefinition->getIsStatic()) {
$code .= PBC_INVARIANT_PLACEHOLDER . PBC_PLACEHOLDER_CLOSE;
}
$code .= 'if (' . PBC_CONTRACT_CONTEXT . ') {\\TechDivision\\PBC\\ContractContext::close();}
return ' . PBC_KEYWORD_RESULT . ';}';
$code .= $functionDefinition->getHeader('definition', $suffix, true) . '{';
return $code;
}
/**
* Will change code to create an entry for the old object state.
*
* @param string $bucketData Payload of the currently
* filtered bucket
* @param \TechDivision\PBC\Entities\Definitions\FunctionDefinition $functionDefinition Currently handled function
*
* @throws \TechDivision\PBC\Exceptions\GeneratorException
*
* @return boolean
*/
private function injectOldCode(&$bucketData, FunctionDefinition &$functionDefinition)
{
// Do we even need to do anything?
if ($functionDefinition->getUsesOld() !== true) {
return false;
}
// If the function is static it should not use the pbcOld keyword as there is no state to the class!
if ($functionDefinition->getIsStatic() === true) {
throw new GeneratorException('Cannot clone class state in static method ' . $functionDefinition->getName());
}
// Still here? Then inject the clone statement to preserve an instance of the object prior to our call.
$bucketData = str_replace(PBC_OLD_SETUP_PLACEHOLDER . $functionDefinition->getName() . PBC_PLACEHOLDER_CLOSE, PBC_KEYWORD_OLD . ' = clone $this;', $bucketData);
// Still here? We encountered no error then.
return true;
}