<?php

declare(strict_types=1);

namespace PHPJava\Kernel\Attributes;

use PHPJava\Core\JVM\Parameters\GlobalOptions;

use PHPJava\Core\JVM\Parameters\Runtime;

use PHPJava\Exceptions\ValidatorException;

final class AttributeInfo implements AttributeInterface

{

use \PHPJava\Kernel\Core\BinaryReader;

use \PHPJava\Kernel\Core\ConstantPool;

use \PHPJava\Kernel\Core\AttributeReference;

use \PHPJava\Kernel\Core\DebugTool;

/**

* @var int

*/

private $attributeNameIndex;

/**

* @var int

*/

private $attributeLength;

/**

* @var AttributeInterface

*/

private $attributeData;

/**

* @throws ValidatorException

*/

public function execute(): void

{

$loadAttributes = GlobalOptions::get('load_attributes') ?? Runtime::LOAD_ATTRIBUTES;

$this->attributeNameIndex = $this->readUnsignedShort();

$this->attributeLength = $this->readUnsignedInt();

$cpInfo = $this->getConstantPool();

$currentOffset = $this->getOffset();

$attributeName = $cpInfo[$this->attributeNameIndex]->getString();

if ($loadAttributes !== null && !in_array($attributeName, $loadAttributes, true)) {

$this->read($this->attributeLength);

$this->getDebugTool()->getLogger()->debug('Skip to load an attribute: ' . $attributeName);

return;

}

$classAttributeName = '\\PHPJava\\Kernel\\Attributes\\' . $attributeName . 'Attribute';

$this->getDebugTool()->getLogger()->debug('Load an attribute: ' . $attributeName);

$this->attributeData = new $classAttributeName($this->reader);

$this->attributeData->setConstantPool($this->getConstantPool());

$this->attributeData->setDebugTool($this->getDebugTool());

$this->attributeData->setAttributeReference($this);

$this->attributeData->execute();

if ($this->attributeLength != ($actual = $this->getOffset() - $currentOffset)) {

throw new ValidatorException(

'Invalid attribute counter. expect number is ' .

$this->attributeLength .

', but actual number is ' . $actual . '.'

);

}

}

public function getAttributeData(): ?AttributeInterface

{

return $this->attributeData;

}

public function getAttributeNameIndex(): int

{

return $this->attributeNameIndex;

}

public function getAttributeLength(): int

{

return $this->attributeLength;

}

}