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<?php
namespace Prophecy\Doubler\ClassPatch;
use Prophecy\Doubler\Generator\Node\ClassNode;
use Prophecy\Exception\Doubler\ClassCreatorException;
class ThrowablePatch implements ClassPatchInterface
{
/**
* Checks if patch supports specific class node.
*
* @param ClassNode $node
* @return bool
*/
public function supports(ClassNode $node)
{
return $this->implementsAThrowableInterface($node) && $this->doesNotExtendAThrowableClass($node);
}
/**
* @param ClassNode $node
* @return bool
*/
private function implementsAThrowableInterface(ClassNode $node)
{
foreach ($node->getInterfaces() as $type) {
if (is_a($type, 'Throwable', true)) {
return true;
}
}
return false;
}
/**
* @param ClassNode $node
* @return bool
*/
private function doesNotExtendAThrowableClass(ClassNode $node)
{
return !is_a($node->getParentClass(), 'Throwable', true);
}
/**
* Applies patch to the specific class node.
*
* @param ClassNode $node
*
* @return void
*/
public function apply(ClassNode $node)
{
$this->checkItCanBeDoubled($node);
$this->setParentClassToException($node);
}
private function checkItCanBeDoubled(ClassNode $node)
{
$className = $node->getParentClass();
if ($className !== 'stdClass') {
throw new ClassCreatorException(
sprintf(
'Cannot double concrete class %s as well as implement Traversable',
$className
),
$node
);
}
}
private function setParentClassToException(ClassNode $node)
{
$node->setParentClass('Exception');
$node->removeMethod('getMessage');
$node->removeMethod('getCode');
$node->removeMethod('getFile');
$node->removeMethod('getLine');
$node->removeMethod('getTrace');
$node->removeMethod('getPrevious');
$node->removeMethod('getNext');
$node->removeMethod('getTraceAsString');
}
/**
* Returns patch priority, which determines when patch will be applied.
*
* @return int Priority number (higher - earlier)
*/
public function getPriority()
{
return 100;
}
}
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