CBPWorkflow::Initialize: Bitrix method

      
<?php 
//  CBPWorkflow :: Initialize()
//  /dist/bitrix/modules/bizproc/classes/general/workflow.php:89

    public function Initialize(CBPActivity $rootActivity, $documentId, $workflowParameters = array(), $workflowVariablesTypes = array(), $workflowParametersTypes = array(), $workflowTemplateId = 0)
    {
        $this->rootActivity = $rootActivity;
        $rootActivity->SetWorkflow($this);
        if (method_exists($rootActivity, 'SetWorkflowTemplateId'))
        {
            $rootActivity->SetWorkflowTemplateId($workflowTemplateId);
        }

        if (method_exists($rootActivity, 'setTemplateUserId'))
        {
            $rootActivity->setTemplateUserId(
                CBPWorkflowTemplateLoader::getTemplateUserId($workflowTemplateId)
            );
        }

        $arDocumentId = CBPHelper::ParseDocumentId($documentId);

        $rootActivity->SetDocumentId($arDocumentId);

        $documentService = $this->GetService("DocumentService");
        $documentType = isset($workflowParameters[CBPDocument::PARAM_DOCUMENT_TYPE]) ?
            $workflowParameters[CBPDocument::PARAM_DOCUMENT_TYPE]
            : $documentService->GetDocumentType($arDocumentId);

        unset($workflowParameters[CBPDocument::PARAM_DOCUMENT_TYPE]);

        if ($documentType !== null)
        {
            $rootActivity->SetDocumentType($documentType);
            $rootActivity->SetFieldTypes($documentService->GetDocumentFieldTypes($documentType));
        }

        $rootActivity->SetProperties($workflowParameters);


        $rootActivity->SetVariablesTypes($workflowVariablesTypes);
        if (is_array($workflowVariablesTypes))
        {
            foreach ($workflowVariablesTypes as $k => $v)
            {
                $variableValue = $v["Default"];
                if ($documentType && $fieldTypeObject = $documentService->getFieldTypeObject($documentType, $v))
                {
                    $fieldTypeObject->setDocumentId($arDocumentId);
                    $variableValue = $fieldTypeObject->internalizeValue('Variable', $variableValue);
                }

                //set defaults on start
                $rootActivity->SetVariable($k, $variableValue);
            }
        }

        $rootActivity->SetPropertiesTypes($workflowParametersTypes);
    }