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<?php
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
* ClassLoader to load Thrift library and definitions
* Inspired from UniversalClassLoader from Symfony 2
*
* @package thrift.classloader
*/
namespace Thrift\ClassLoader;
class ThriftClassLoader
{
/**
* Namespaces path
* @var array
*/
protected $namespaces = array();
/**
* Thrift definition paths
* @var type
*/
protected $definitions = array();
/**
* Do we use APC cache ?
* @var boolean
*/
protected $apc = false;
/**
* APC Cache prefix
* @var string
*/
protected $apc_prefix;
/**
* Set autoloader to use APC cache
* @param boolean $apc
* @param string $apc_prefix
*/
public function __construct($apc = false, $apc_prefix = null)
{
$this->apc = $apc;
$this->apc_prefix = $apc_prefix;
}
/**
* Registers a namespace.
*
* @param string $namespace The namespace
* @param array|string $paths The location(s) of the namespace
*/
public function registerNamespace($namespace, $paths)
{
$this->namespaces[$namespace] = (array)$paths;
}
/**
* Registers a Thrift definition namespace.
*
* @param string $namespace The definition namespace
* @param array|string $paths The location(s) of the definition namespace
*/
public function registerDefinition($namespace, $paths)
{
$this->definitions[$namespace] = (array)$paths;
}
/**
* Registers this instance as an autoloader.
*
* @param Boolean $prepend Whether to prepend the autoloader or not
*/
public function register($prepend = false)
{
spl_autoload_register(array($this, 'loadClass'), true, $prepend);
}
/**
* Loads the given class, definition or interface.
*
* @param string $class The name of the class
*/
public function loadClass($class)
{
if ((true === $this->apc && ($file = $this->findFileInApc($class))) or
($file = $this->findFile($class))
) {
require_once $file;
}
}
/**
* Loads the given class or interface in APC.
* @param string $class The name of the class
* @return string
*/
protected function findFileInApc($class)
{
if (false === $file = apc_fetch($this->apc_prefix . $class)) {
apc_store($this->apc_prefix . $class, $file = $this->findFile($class));
}
return $file;
}
/**
* Find class in namespaces or definitions directories
* @param string $class
* @return string
*/
public function findFile($class)
{
// Remove first backslash
if ('\\' == $class[0]) {
$class = substr($class, 1);
}
if (false !== $pos = strrpos($class, '\\')) {
// Namespaced class name
$namespace = substr($class, 0, $pos);
// Iterate in normal namespaces
foreach ($this->namespaces as $ns => $dirs) {
//Don't interfere with other autoloaders
if (0 !== strpos($namespace, $ns)) {
continue;
}
foreach ($dirs as $dir) {
$className = substr($class, $pos + 1);
$file = $dir . DIRECTORY_SEPARATOR .
str_replace('\\', DIRECTORY_SEPARATOR, $namespace) .
DIRECTORY_SEPARATOR .
$className . '.php';
if (file_exists($file)) {
return $file;
}
}
}
// Iterate in Thrift namespaces
// Remove first part of namespace
$m = explode('\\', $class);
// Ignore wrong call
if (count($m) <= 1) {
return;
}
$class = array_pop($m);
$namespace = implode('\\', $m);
foreach ($this->definitions as $ns => $dirs) {
//Don't interfere with other autoloaders
if (0 !== strpos($namespace, $ns)) {
continue;
}
foreach ($dirs as $dir) {
/**
* Available in service: Interface, Client, Processor, Rest
* And every service methods (_.+)
*/
if (0 === preg_match('#(.+)(if|client|processor|rest)$#i', $class, $n) and
0 === preg_match('#(.+)_[a-z0-9]+_(args|result)$#i', $class, $n)
) {
$className = 'Types';
} else {
$className = $n[1];
}
$file = $dir . DIRECTORY_SEPARATOR .
str_replace('\\', DIRECTORY_SEPARATOR, $namespace) .
DIRECTORY_SEPARATOR .
$className . '.php';
if (file_exists($file)) {
return $file;
}
}
}
}
}
}
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