<?php

declare(strict_types=1);

namespace PHPJava\Kernel\Mnemonics;

use PHPJava\Core\JavaClassInterface;

use PHPJava\Packages\java\lang\NoSuchFieldException;

final class _getfield extends AbstractOperationCode implements OperationCodeInterface

{

protected $isStackingOperation = true;

public function getOperands(): ?Operands

{

parent::getOperands();

if ($this->operands !== null) {

return $this->operands;

}

$indexbyte = $this->readUnsignedShort();

return $this->operands = new Operands(

['indexbyte', $indexbyte, ['indexbyte1', 'indexbyte2']]

);

}

public function execute(): void

{

parent::execute();

$cpInfo = $this->getConstantPool();

$cp = $cpInfo[$this->getOperands()['indexbyte']];

$class = $cpInfo[$cp->getNameAndTypeIndex()];

$name = $cpInfo[$class->getNameIndex()]->getString();

/**

* @var JavaClassInterface $objectref

*/

$objectref = $this->popFromOperandStack();

$return = $objectref->getInvoker()->getDynamic()->getFields()->get($name);

if ($return !== null) {

$this->pushToOperandStack($return);

return;

}

throw new NoSuchFieldException('Tried to get undefined field ' . $name);

}

}