/**
* Will inject invocation code for a given function into a given piece of code.
* Invocation code will be the instantiation of a \AppserverIo\Doppelgaenger\Entities\MethodInvocation object
* as a basic representation of the given function
*
* @param string $bucketData Reference on the current bucket's data
* @param FunctionDefinition $functionDefinition Definition of the function to inject invocation code into
* @param array $callbackChain Chain of callbacks which is used to recursively chain calls
*
* @return boolean
*/
protected function injectInvocationCode(&$bucketData, FunctionDefinition $functionDefinition, array $callbackChain)
{
// start building up the code
$code = '
' . ReservedKeywords::METHOD_INVOCATION_OBJECT . ' = new \\AppserverIo\\Doppelgaenger\\Entities\\MethodInvocation(
';
// add the original method call to the callback chain so it can be integrated, add it and add the context
if ($functionDefinition->isStatic()) {
$contextCode = '__CLASS__';
} else {
$contextCode = '$this';
}
// iterate the callback chain and build up the code but pop the first element as we will invoke it initially
unset($callbackChain[0]);
// empty chain? Add the original function at least
if (empty($callbackChain)) {
$callbackChain[] = array($functionDefinition->getStructureName(), $functionDefinition->getName());
}
$code .= ' array(';
foreach ($callbackChain as $callback) {
// do some brushing up for the structure
$structure = $callback[0];
if ($structure === $functionDefinition->getStructureName()) {
$structure = $contextCode;
}
// also brush up the function call to direct to the original
if ($callback[1] === $functionDefinition->getName()) {
$callback[1] = $functionDefinition->getName() . ReservedKeywords::ORIGINAL_FUNCTION_SUFFIX;
}
$code .= 'array(' . $structure . ', \'' . $callback[1] . '\'),';
}
$code .= '),
';
// continue with the access modifiers
$code .= ' ' . $contextCode . ',
' . ($functionDefinition->isAbstract() ? 'true' : 'false') . ',
' . ($functionDefinition->isFinal() ? 'true' : 'false') . ',
' . ($functionDefinition->isStatic() ? 'true' : 'false') . ',
';
// we have to build up manual parameter collection as func_get_args() only returns copies
// @see http://php.net/manual/en/function.func-get-args.php
$parametersCode = ' array(';
foreach ($functionDefinition->getParameterDefinitions() as $parameterDefinition) {
$name = $parameterDefinition->name;
$parametersCode .= '\'' . substr($name, 1) . '\' => ' . $name . ',';
}
$parametersCode .= ')';
$code .= ' \'' . $functionDefinition->getName() . '\',
' . $parametersCode . ',
__CLASS__,
\'' . $functionDefinition->getVisibility() . '\'
);';
// Insert the code
$placeholder = Placeholders::FUNCTION_BEGIN . $functionDefinition->getName() . Placeholders::PLACEHOLDER_CLOSE;
$bucketData = str_replace($placeholder, $placeholder . $code, $bucketData);
return true;
}
