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msd2/tracking/piwik/libs/HTML/QuickForm2/Loader.php

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+<?php
+/**
+ * Class with static methods for loading classes and files 
+ *
+ * PHP version 5
+ *
+ * LICENSE:
+ *
+ * Copyright (c) 2006-2010, Alexey Borzov <avb@php.net>,
+ *                          Bertrand Mansion <golgote@mamasam.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ *    * Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *    * The names of the authors may not be used to endorse or promote products
+ *      derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @category   HTML
+ * @package    HTML_QuickForm2
+ * @author     Alexey Borzov <avb@php.net>
+ * @author     Bertrand Mansion <golgote@mamasam.com>
+ * @license    http://opensource.org/licenses/bsd-license.php New BSD License
+ * @version    SVN: $Id: Loader.php 294057 2010-01-26 21:10:28Z avb $
+ * @link       http://pear.php.net/package/HTML_QuickForm2
+ */
+
+/**
+ * Exception classes for HTML_QuickForm2
+ */
+// require_once 'HTML/QuickForm2/Exception.php';
+require_once dirname(__FILE__) . '/Exception.php';
+
+/**
+ * Class with static methods for loading classes and files 
+ *
+ * @category   HTML
+ * @package    HTML_QuickForm2
+ * @author     Alexey Borzov <avb@php.net>
+ * @author     Bertrand Mansion <golgote@mamasam.com>
+ * @version    Release: @package_version@
+ */
+class HTML_QuickForm2_Loader
+{
+   /**
+    * Tries to load a given class
+    *
+    * If no $includeFile was provided, $className will be used with underscores
+    * replaced with path separators and '.php' extension appended
+    *
+    * @param    string  Class name to load
+    * @param    string  Name of the file (supposedly) containing the given class
+    * @throws   HTML_QuickForm2_NotFoundException   If the file either can't be
+    *               loaded or doesn't contain the given class
+    */
+    public static function loadClass($className, $includeFile = null)
+    {
+        if (class_exists($className, false) || interface_exists($className, false)) {
+            return true;
+        }
+
+        if (empty($includeFile)) {
+            $includeFile = str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
+        }
+        // Do not silence the errors with @, parse errors will not be seen
+        include $includeFile;
+
+        // Still no class?
+        if (!class_exists($className, false) && !interface_exists($className, false)) {
+            if (!self::fileExists($includeFile)) {
+                throw new HTML_QuickForm2_NotFoundException(
+                    "File '$includeFile' was not found"
+                );
+            } else {
+                throw new HTML_QuickForm2_NotFoundException(
+                    "Class '$className' was not found within file '$includeFile'"
+                );
+            }
+        }
+    }
+
+   /**
+    * Checks whether the file exists in the include path
+    *
+    * @param    string  file name
+    * @return   bool
+    */
+    public static function fileExists($fileName)
+    {
+        $fp = @fopen($fileName, 'r', true);
+        if (is_resource($fp)) {
+            fclose($fp);
+            return true;
+        }
+        return false;
+    }
+
+   /**
+    * Loading of HTML_QuickForm2_* classes suitable for SPL autoload mechanism
+    *
+    * This method will only try to load a class if its name starts with
+    * HTML_QuickForm2. Register with the following:
+    * <code>
+    * spl_autoload_register(array('HTML_QuickForm2_Loader', 'autoload'));
+    * </code>
+    *
+    * @param    string  Class name
+    * @return   bool    Whether class loaded successfully
+    */
+    public static function autoload($class)
+    {
+        if (0 !== strpos($class, 'HTML_QuickForm2')) {
+            return false;
+        }
+        try {
+            @self::loadClass($class);
+            return true;
+        } catch (Exception $e) {
+            return false;
+        }
+    }
+}
+?>