A two array data structure implementation in PHP, version 2

کد

<?php

namespace Techanic\CS\DS\Linear\Vector;

use Exception;

abstract class AbstractTwoDimArray implements \ArrayAccess
{
    /**
     *
     * @var array
     */
    private /*array*/ $_size = [0, 0];

    /**
     *
     * @var array
     */
    private /*array*/ $_rows = [];

    protected abstract function getValueType() : string;
    protected abstract function getDefaultValue();

    public function __construct(int $rows, int $cols)
    {
        if ($rows < 0)
            throw new Exception('rows must be positive number.');
        if ($cols < 0)
            throw new Exception('cols must be positive number.');
        $this->_size = [$rows, $cols];
        $defaultValue = $this->getDefaultValue();
        if (gettype($defaultValue) != $this->getValueType())
            throw new Exception('Return type of the getDefaultValue() does not match getValueType().');
        for ($row = 0; $row < $this->_size[0]; $row++)
        {
            $this->_rows[$row] = OneDimArrayFactory::Make($this->getValueType(), $this->_size[1]);
            for ($col = 0; $col < $this->_size[1]; $col++)
                ($this->_rows[$row])[$col] = $defaultValue;
        }
    }

    public function Size(): array
    {
        return $this->_size;
    }

    public function offsetSet($row, $value)
    {
        if (gettype($row) != gettype(0))
            throw new Exception('The index must be of type ' . gettype(0));
        if ($row < 0 || $row >= $this->_size[0])
            throw new Exception('The index must be in the range (0, ' . ($this->_size[0] -1) . ')');
        if (!($value instanceof OneDimArrayInterface)) // TODO: check more accurate constraint
            throw new Exception('The value must be of type OneDimArrayInterface');
        if ($value->Size() != $this->_size[1])
            throw new Exception('The value size does not match.');
        $this->_rows[$row] = $value;
    }

    public function offsetExists($row)
    {
        if (gettype($row) != gettype(0))
            throw new Exception('The index must be of type ' . gettype(0));
        return ($row >=0 && $row < $this->_size[0]);
    }

    public function offsetGet($row)
    {
        if (gettype($row) != gettype(0))
            throw new Exception('The index must be of type ' . gettype(0));
        return $this->_rows[$row];
    }

    public function offsetUnset($row)
    {
        if (gettype($row) != gettype(0))
            throw new Exception('The index must be of type ' . gettype(0));
        $this->_rows[$row] = OneDimArrayFactory::Make($this->getValueType, $this->_size[1]);
    }
}

class IntTwoDimArray extends AbstractTwoDimArray
{
    protected function getValueType() : string
    {
        return gettype(0);
    }

    protected function getDefaultValue()
    {
        return 0;
    }
}

$rows = 5;
$cols = 5;
$intMatrix = new IntTwoDimArray($rows, $cols);
for ($row = 0; $row < $intMatrix->Size()[0]; $row++) {
    for ($col = 0; $col < $intMatrix->Size()[1]; $col++)
        echo $intMatrix[$row][$col] . ' ';
    echo PHP_EOL;
}
echo PHP_EOL;
for ($row = 0; $row < $intMatrix->Size()[0]; $row++) {
    for ($col = 0; $col < $intMatrix->Size()[1]; $col++)
        $intMatrix[$row][$col] = $row + $col;
}
for ($row = 0; $row < $intMatrix->Size()[0]; $row++) {
    for ($col = 0; $col < $intMatrix->Size()[1]; $col++)
        echo $intMatrix[$row][$col] . ' ';
    echo PHP_EOL;
}
echo PHP_EOL;