Xiag\Rql\Parser\NodeParserChain

Complexity

Total Complexity

7

Size/Duplication

Total Lines	52
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	2

Test Coverage

Coverage

100%

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	addNodeParser()	0	5	1
A	parse()	0	17	3
A	supports()	0	10	3

<?php
namespace Xiag\Rql\Parser;

use Xiag\Rql\Parser\Exception\SyntaxErrorException;

class NodeParserChain implements NodeParserInterface
{
    /**
     * @var NodeParserInterface[]
     */
    protected $nodeParsers;

    /**
     * @param NodeParserInterface $nodeParser
     * @return $this
     */
    public function addNodeParser(NodeParserInterface $nodeParser)
    {
        $this->nodeParsers[] = $nodeParser;
        return $this;
    }

    /**
     * @inheritdoc
     */
    public function parse(TokenStream $tokenStream)
    {
        foreach ($this->nodeParsers as $nodeParser) {
            if ($nodeParser->supports($tokenStream)) {
                return $nodeParser->parse($tokenStream);
            }
        }

        throw new SyntaxErrorException(
            sprintf(
                'Unexpected token "%s" (%s) at position %d',
                $tokenStream->getCurrent()->getValue(),
                $tokenStream->getCurrent()->getName(),
                $tokenStream->getCurrent()->getStart()
            )
        );
    }

    /**
     * @inheritdoc
     */
    public function supports(TokenStream $tokenStream)
    {
        foreach ($this->nodeParsers as $nodeParser) {
            if ($nodeParser->supports($tokenStream)) {
                return true;
            }
        }

        return false;
    }
}