//option1:a1
//template_type:2
//option2:a2
//template_distr_type:1
//option3:a3
//template_status:1
//option4:a4
//create_datepicker1:01.04.2013
//create_datepicker2:24.04.2013
//option5:a5
//search_text:rty rty rty

 StringBuilder sql =  new StringBuilder("SELECT m FROM Template m ");       
 HashMap<String,Object> sqlparams = new HashMap<String, Object>();


            String option1 = (request.getParameter("option1"));
            if (option1 != null && option1.equals("a1")) {
                template_type  = ...
                
            }
            String option2 = (request.getParameter("option2"));
            if (option2 != null && option2.equals("a2")) {
                template_distr_type = ...
            }
            
            String option3 = (request.getParameter("option3"));
            if (option3 != null && option3.equals("a3")) {
                template_status = ...
            }
            
            String option4 = (request.getParameter("option4"));
            if (option4 != null && option4.equals("a4")) {
                try {
                    create_datepicker1 = ...
                    create_datepicker2 = ....
                } catch (ParseException ex) {

                }
            }
            String option5 = (request.getParameter("option5"));
            if (option5 != null && option5.equals("a5")) {
                like =....
            }
            
            if (template_type != null || template_distr_type != null || template_status != null || (create_datepicker1!=null && create_datepicker2 != null ) || like != null) {
                sql.append(" WHERE ");
                boolean flag1 = false;
                boolean flag2 = false;
                boolean flag3 = false;
                boolean flag4 = false;
                if (template_type != null) {
                    sql.append(" m.templateType=:templateType ");
                    sqlparams.put("templateType", template_type);
                    flag1 = true;
                }
                if (template_distr_type != null) {
                    if(flag1) sql.append(" AND ");
                    sql.append(" m.templateDistrType=:templateDistrType ");
                    sqlparams.put("templateDistrType", template_distr_type);
                    flag2 = true; 
                }
                if (template_status != null) {
                    if(flag1 || flag2)  sql.append(" AND ");
                    sql.append(" m.templateStatus=:templateStatus ");
                    sqlparams.put("templateStatus", template_status);
                    flag3 = true;
                }
                
                if(create_datepicker1 != null && create_datepicker2 != null){
                    if(flag1 || flag2 || flag3) sql.append(" AND ");
                    sql.append(" m.templateLoadDate BETWEEN  :start AND :end ");
                    sqlparams.put("start", create_datepicker1);
                    sqlparams.put("end", create_datepicker2);
                    flag4 = true;
                }
                if(like!=null && !like.isEmpty()){
                    if(flag1 || flag2 || flag3 || flag4) sql.append(" AND ");
                    sql.append(" m.templateName LIKE lower(:textlike) ");
                    like = like.replaceAll("%", "");
                    sqlparams.put("textlike", "%"+like+"%");
                }
            }
            
           
            
            sql.append(" ORDER BY  m.templateLoadDate DESC");
            
            List<Template> list = controller.findByCriteria(sql.toString() , sqlparams);

....


    public List<Template> findByCriteria(String sql, HashMap<String, Object> sqlparams) {
        TypedQuery<Template> q = getEntityManager().createQuery(sql, Template.class);
        if (sqlparams != null && !sqlparams.isEmpty()) {
            Set<String> keys = sqlparams.keySet();
            for (String key : keys) {
                Object keyvalue = sqlparams.get(key);
                q.setParameter(key, keyvalue);
            }
        }
        q.setMaxResults(40);
        return q.getResultList();
    }