class.ilADTFactory.php

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<?php
 
require_once "Services/ADT/classes/class.ilADT.php";
require_once "Services/ADT/classes/class.ilADTDefinition.php";
 
class ilADTFactory
{
        protected static $instance; // [ilADTFactory]
        
        protected function __construct() 
        {
                
        }
        
        public static function getInstance()
        {
                if(self::$instance === null)
                {
                        self::$instance = new self;
                }
                return self::$instance;
        }
        
        public function getValidTypes()
        {
                return array("Float", "Integer", "Location", "Text", "Boolean", 
                        "MultiText", "Date", "DateTime", "Enum", "MultiEnum", "Group"); 
        }
        
        public function isValidType($a_type)
        {
                return in_array((string)$a_type, $this->getValidTypes());
        }
        
        public function initTypeClass($a_type, $a_class = null)
        {
                if($this->isValidType($a_type))
                {
                        $class = "ilADT".$a_type.$a_class;
                        $file = "Services/ADT/classes/Types/".$a_type."/class.".$class.".php";
                        if(file_exists($file))
                        {
                                require_once $file;
                                return $class;
                        }                       
                }
                
                throw new Exception("ilADTFactory unknown type");
        }
        
        public function getDefinitionInstanceByType($a_type)
        {
                $class = $this->initTypeClass($a_type, "Definition");           
                return new $class();            
        }       
        
        public function getInstanceByDefinition(ilADTDefinition $a_def)
        {
                if(!method_exists($a_def, "getADTInstance"))
                {                       
                        $class = $this->initTypeClass($a_def->getType());               
                        return new $class($a_def);              
                }
                else
                {
                        return $a_def->getADTInstance();
                }
        }                       
        
        
        //
        // bridges
        // 
        
        public function getFormBridgeForInstance(ilADT $a_adt)
        {               
                $class = $this->initTypeClass($a_adt->getType(), "FormBridge");         
                return new $class($a_adt);
        }
        
        public function getDBBridgeForInstance(ilADT $a_adt)
        {
                $class = $this->initTypeClass($a_adt->getType(), "DBBridge");           
                return new $class($a_adt);      
        }
        
        public function getPresentationBridgeForInstance(ilADT $a_adt)
        {
                $class = $this->initTypeClass($a_adt->getType(), "PresentationBridge");         
                return new $class($a_adt);      
        }
        
        public function getSearchBridgeForDefinitionInstance(ilADTDefinition $a_adt_def, $a_range = true, $a_multi = true)
        {
                if($a_range)
                {
                        try
                        {
                                $class = $this->initTypeClass($a_adt_def->getType(), "SearchBridgeRange");      
                                return new $class($a_adt_def);  
                        }
                        catch(Exception $e)
                        {
                                
                        }
                }
                
                // multi enum search (single) == enum search (multi)            
                if(!$a_multi &&
                        $a_adt_def->getType() == "MultiEnum")
                {
                        $class = $this->initTypeClass("Enum", "SearchBridgeMulti");     
                        return new $class($a_adt_def);  
                }       
                
                if($a_multi)
                {
                        try
                        {                                                                                                       
                                $class = $this->initTypeClass($a_adt_def->getType(), "SearchBridgeMulti");      
                                return new $class($a_adt_def);  
                        }
                        catch(Exception $e)
                        {
 
                        }
                }                       
                $class = $this->initTypeClass($a_adt_def->getType(), "SearchBridgeSingle");     
                return new $class($a_adt_def);                                  
        }
        
        
        public function getActiveRecordBridgeForInstance(ilADT $a_adt)
        {
                $class = $this->initTypeClass($a_adt->getType(), "ActiveRecordBridge");         
                return new $class($a_adt);
        }
        
        
        //
        // active records
        // 
        
        public static function getActiveRecordInstance(ilADTGroupDBBridge $a_properties)
        {
                require_once "Services/ADT/classes/ActiveRecord/class.ilADTActiveRecord.php";
                return new ilADTActiveRecord($a_properties);
        }
        
        public static function initActiveRecordByType()
        {
                require_once "Services/ADT/classes/ActiveRecord/class.ilADTActiveRecordByType.php";
        }
        
        public static function getActiveRecordByTypeInstance(ilADTGroupDBBridge $a_properties)
        {
                self::initActiveRecordByType();
                return new ilADTActiveRecordByType($a_properties);
        }
}
 
?>