File handling in Bean Shell Form Store Binder

import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.Map;
import org.joget.apps.app.model.AppDefinition;
import org.joget.apps.app.service.AppService;
import org.joget.apps.app.service.AppUtil;
import org.joget.apps.form.dao.FormDataDao;
import org.joget.apps.form.model.Element;
import org.joget.apps.form.model.Form;
import org.joget.apps.form.model.FormBinder;
import org.joget.apps.form.model.FormData;
import org.joget.apps.form.model.FormDataDeletableBinder;
import org.joget.apps.form.model.FormLoadBinder;
import org.joget.apps.form.model.FormLoadMultiRowElementBinder;
import org.joget.apps.form.model.FormRow;
import org.joget.apps.form.model.FormRowSet;
import org.joget.apps.form.model.FormStoreBinder;
import org.joget.apps.form.model.FormStoreMultiRowElementBinder;
import org.joget.apps.form.service.FormUtil;
import org.joget.commons.util.LogUtil;
import org.joget.commons.util.FileManager;
import org.joget.apps.form.service.FileUtil;
   
public FormRowSet store(Element element, FormRowSet rows, FormData formData) {
    if (rows == null) {
        return null;
    }
     
    try {
        String tableName = "grid_form";
        String formDefId = "grid_form";
        String foreignKey = "fk";
        String fileField = "files";
         
        FormDataDao formDataDao = (FormDataDao) AppUtil.getApplicationContext().getBean("formDataDao");
         
        Form parentForm = FormUtil.findRootForm(element);
        String primaryKeyValue = parentForm.getPrimaryKeyValue(formData);
         
        Map exist = new HashMap();
             
        //Check for deletion
        FormRowSet originalRowSet = formDataDao.find(formDefId, tableName, " WHERE " + FormUtil.PROPERTY_CUSTOM_PROPERTIES + "." + foreignKey + " = ?", new Object[]{primaryKeyValue}, "dateCreated", false, null, null);
         
        if (originalRowSet != null && !originalRowSet.isEmpty()) {
            Collection ids = new ArrayList();
            for (FormRow r : originalRowSet) {
                if (rows == null || (rows != null && !rows.contains(r))) {
                    ids.add(r.getId());
                     
                    //delete files
                    String files = r.getProperty(fileField);
                    if (files != null && !files.isEmpty()) {
                        String[] file_paths = files.split(";");
                        for (String path : file_paths) {
                            File file = FileUtil.getFile(path, tableName, r.getId());
                            if (file != null && file.exists()) {
                                File folder = file.getParentFile();
                                FileManager.deleteFile(folder);
                                break;
                            }
                        }
                    }
                } else {
                    exist.put(r.getId(), r);
                }
            }
            if (ids.size() > 0) {
                formDataDao.delete(formDefId, tableName, ids.toArray(new String[ids.size()]));
            }
        }
        Date currentDate = new Date();
         
        for (FormRow row : rows) {
            //set id and update data
            String id = row.getId();
            if (id != null && exist.containsKey(id)) {
                FormRow temp = new FormRow();
                temp.putAll(row);
                     
                row.putAll(exist.get(id));
                row.putAll(temp);
            } else if (id == null || id.isEmpty()) {
                row.setId(UuidGenerator.getInstance().getUuid());
                // set created date
                row.setDateCreated(currentDate);
            }
            // set modified date
            row.setDateModified(currentDate);
            //set foreign key
            row.put(foreignKey, primaryKeyValue);
        }
 
        //Check and update filename if exists
        FileUtil.checkAndUpdateFileName(rows, tableName, primaryKeyValue);
 
        // save data
        formDataDao.saveOrUpdate(formDefId, tableName, rows);
         
        //store files
        FileUtil.storeFileFromFormRowSet(rows, tableName, primaryKeyValue);
    } catch (Exception e) {
        LogUtil.error("File Handling in Bean Shell Binder Sample - Grid Form", e, "Store data error!!");
    }
    return rows;
}
   
//call store method with injected variable
return store(element, rows, formData);