70 lines
1.9 KiB
PHP
70 lines
1.9 KiB
PHP
<?php
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namespace Guzzle\Inflection;
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/**
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* Decorator used to add memoization to previously inflected words
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*/
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class MemoizingInflector implements InflectorInterface
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{
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/** @var array Array of cached inflections */
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protected $cache = array(
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'snake' => array(),
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'camel' => array()
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);
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/** @var int Max entries per cache */
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protected $maxCacheSize;
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/** @var InflectorInterface Decorated inflector */
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protected $decoratedInflector;
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/**
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* @param InflectorInterface $inflector Inflector being decorated
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* @param int $maxCacheSize Maximum number of cached items to hold per cache
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*/
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public function __construct(InflectorInterface $inflector, $maxCacheSize = 500)
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{
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$this->decoratedInflector = $inflector;
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$this->maxCacheSize = $maxCacheSize;
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}
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public function snake($word)
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{
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if (!isset($this->cache['snake'][$word])) {
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$this->pruneCache('snake');
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$this->cache['snake'][$word] = $this->decoratedInflector->snake($word);
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}
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return $this->cache['snake'][$word];
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}
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/**
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* Converts strings from snake_case to upper CamelCase
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*
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* @param string $word Value to convert into upper CamelCase
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*
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* @return string
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*/
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public function camel($word)
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{
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if (!isset($this->cache['camel'][$word])) {
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$this->pruneCache('camel');
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$this->cache['camel'][$word] = $this->decoratedInflector->camel($word);
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}
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return $this->cache['camel'][$word];
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}
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/**
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* Prune one of the named caches by removing 20% of the cache if it is full
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*
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* @param string $cache Type of cache to prune
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*/
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protected function pruneCache($cache)
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{
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if (count($this->cache[$cache]) == $this->maxCacheSize) {
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$this->cache[$cache] = array_slice($this->cache[$cache], $this->maxCacheSize * 0.2);
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}
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}
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}
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