ClassMap.php

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<?php
namespace Elgg;
class ClassMap {

    protected $map = array();

    protected $altered = false;

    public function getPath($class) {
        if ('\\' === $class[0]) {
            $class = substr($class, 1);
        }
        return isset($this->map[$class]) ? $this->map[$class] : "";
    }

    public function setPath($class, $path) {
        if ('\\' === $class[0]) {
            $class = substr($class, 1);
        }
        if (!isset($this->map[$class]) || $this->map[$class] !== $path) {
            $this->map[$class] = $path;
            $this->altered = true;
        }
        return $this;
    }

    public function getAltered() {
        return $this->altered;
    }

    public function setAltered($altered) {
        $this->altered = (bool) $altered;
        return $this;
    }

    public function getMap() {
        return $this->map;
    }

    public function setMap(array $map) {
        $this->map = $map;
        return $this;
    }

    public function mergeMap(array $map) {
        $this->map = array_merge($this->map, $map);
        return $this;
    }
}