MemoizingInflector.php

<?php
 
namespace Guzzle\Inflection;
 
class MemoizingInflector implements InflectorInterface
{
    protected $cache = array(
        'snake' => array(),
        'camel' => array()
    );
 
    protected $maxCacheSize;
 
    protected $decoratedInflector;
 
    public function __construct(InflectorInterface $inflector, $maxCacheSize = 500)
    {
        $this->decoratedInflector = $inflector;
        $this->maxCacheSize = $maxCacheSize;
    }
 
    public function snake($word)
    {
        if (!isset($this->cache['snake'][$word])) {
            $this->pruneCache('snake');
            $this->cache['snake'][$word] = $this->decoratedInflector->snake($word);
        }
 
        return $this->cache['snake'][$word];
    }
 
    public function camel($word)
    {
        if (!isset($this->cache['camel'][$word])) {
            $this->pruneCache('camel');
            $this->cache['camel'][$word] = $this->decoratedInflector->camel($word);
        }
 
        return $this->cache['camel'][$word];
    }
 
    protected function pruneCache($cache)
    {
        if (count($this->cache[$cache]) == $this->maxCacheSize) {
            $this->cache[$cache] = array_slice($this->cache[$cache], $this->maxCacheSize * 0.2);
        }
    }
}