重写queryListener

Hello All,

this post talks about a common requirement - can we apply custom validation in af:query fields ? yes , we can do that by overriding default query listener of af:query component

What af:query is ?

see- Oracle Docs-af:query

"The query component provides the user the ability to perform a query based on a saved search or personalize saved searches. The component displays a search panel with various elements, each of which help the user to accomplish various tasks."

Follow steps to apply validation on af:query-

Here i am taking example of Departments table of HR Schema
First create business components for Departments table
then create bind variables and a view-criteria in departments view object
See the view criteria is applied for LocationId, ManagerId and Department Name

Now create a page and drop criteria with table on page- it will look like this

Next is to select af:query on page and go to property inspector and copy text of default query listener
Now create a managed bean and create a custom query listener for af:query
In this custom query listener , in this example i am checking for negative Location Id and Manager Id, if there is any negative values ,custom method will show a message otherwise default queryListenerwill be executed
We can get af:query's components value using 2 methods
First One - Using Bind Variable (getNamedWhereClauseParam)
Second One - Using QueryDescriptor and ConjunctionCriterion
I'm going to explain both methods - see code of custom query listener using first method, two generic methods will be used in this process to invoke expression language and to get BindingContainer of current context

    /**Method to invoke EL Expression
     * @param el
     * @param paramTypes
     * @param params
     * @return
     */
    public static Object invokeEL(String el, Class[] paramTypes, Object[] params) {
        FacesContext facesContext = FacesContext.getCurrentInstance();
        ELContext elContext = facesContext.getELContext();
        ExpressionFactory expressionFactory = facesContext.getApplication().getExpressionFactory();
        MethodExpression exp = expressionFactory.createMethodExpression(elContext, el, Object.class, paramTypes);

        return exp.invoke(elContext, params);
    }

    /**Method to get Binding Container of current page
     * @return
     */
    public BindingContainer getBindings() {
        return BindingContext.getCurrent().getCurrentBindingsEntry();
    }

See the first method to get af:query components value and validate that

    /**Custome Query Listener- Using getNamedWhereClauseParam
     * @param queryEvent
     */
    public void customQueryListener(QueryEvent queryEvent) {
        String deptName = null;
        Integer locId = null;
        Integer mgrId = null;

        /**Get Iterator of Table*/
        DCIteratorBinding iter = (DCIteratorBinding)getBindings().get("DepartmentsView1Iterator");

        /**Get ViewObject from Iterator*/
        ViewObjectImpl vo = (ViewObjectImpl)iter.getViewObject();

        /**Get Bind Variable's Value*/
        if (vo.getNamedWhereClauseParam("LocIdBind") != null) {
            locId = Integer.parseInt(vo.getNamedWhereClauseParam("LocIdBind").toString());
        }
        if (vo.getNamedWhereClauseParam("MgrIdBind") != null) {
            mgrId = Integer.parseInt(vo.getNamedWhereClauseParam("MgrIdBind").toString());
        }
        if (vo.getNamedWhereClauseParam("DeptNmBind") != null) {
            deptName = vo.getNamedWhereClauseParam("DeptNmBind").toString();
        }

        /**Check for Negative values*/
        if ((locId != null && locId < 0) || (mgrId != null && mgrId < 0)) {
            FacesMessage msg = new FacesMessage("Id Value can not be negative");
            msg.setSeverity(FacesMessage.SEVERITY_ERROR);
            FacesContext.getCurrentInstance().addMessage(null, msg);
        } else {
            /**Execute default query listener with help of invokeEL method*/

            invokeEL("#{bindings.DepartmentsViewCriteriaQuery.processQuery}", new Class[] { QueryEvent.class },
                     new Object[] { queryEvent });
        }
    }

And Second Method using QueryDescriptor is-

    /**Custom Query Listener-Using QueryDescriptor
     * @param queryEvent
     */
    public void customqueryProcess(QueryEvent queryEvent) {
        String deptName = null;
        Integer locId = null;
        Integer mgrId = null;

        /**Reference-Frank Nimphius Example- ADF Code Corner
       * http://www.oracle.com/technetwork/developer-tools/adf/learnmore/85-querycomponent-fieldvalidation-427197.pdf
       * */
        QueryDescriptor qd = queryEvent.getDescriptor();

        ConjunctionCriterion conCrit = qd.getConjunctionCriterion();
        //access the list of search fields
        List<Criterion> criterionList = conCrit.getCriterionList();
        //iterate over the attributes to find FromDate and ToDate
        for (Criterion criterion : criterionList) {
            AttributeDescriptor attrDescriptor = ((AttributeCriterion)criterion).getAttribute();

            if (attrDescriptor.getName().equalsIgnoreCase("DepartmentName")) {
                deptName = (String)((AttributeCriterion)criterion).getValues().get(0);

            } else {
                if (attrDescriptor.getName().equalsIgnoreCase("LocationId")) {
                    locId = (Integer)((AttributeCriterion)criterion).getValues().get(0);

                }
            }
            if (attrDescriptor.getName().equalsIgnoreCase("ManagerId")) {
                mgrId = (Integer)((AttributeCriterion)criterion).getValues().get(0);

            }
        }
        if ((locId != null && locId < 0) || (mgrId != null && mgrId < 0)) {
            FacesMessage msg = new FacesMessage("Id Value can not be negative");
            msg.setSeverity(FacesMessage.SEVERITY_ERROR);
            FacesContext.getCurrentInstance().addMessage(null, msg);
        } else {
            /**Process default query listener*/
            invokeEL("#{bindings.DepartmentsViewCriteriaQuery.processQuery}", new Class[] { QueryEvent.class },
                     new Object[] { queryEvent });
        }

    }

/** * 重写queryListener,获取query的属性字段值,传入存储过程查询合计结果(应缴费用、已交金额、减免费用和欠费) * 两种方法：1.通过绑定变量(getNamedWhereClauseParam); 2.使用QueryDescriptor and ConjunctionCriterion * 注意:如果使用第二种方法是获取不到下拉值,所以下面结合这两种方法去获取query的输入框和下拉值(年级、校区、院系、专业、班级) * @param queryEvent * */ public void queryListener(QueryEvent queryEvent) { JSFUtils.invokeMethodExpression("#{bindings.SfglXsxxVoCriteriaQuery.processQuery}", Object.class, QueryEvent.class, queryEvent); //默认执行自带的查询方法 ViewObject vo = ADFUtils.findIterator("SfglXsxxVo1Iterator").getViewObject(); //---使用Using QueryDescriptor and ConjunctionCriterion QueryDescriptor qd = queryEvent.getDescriptor(); ConjunctionCriterion conCrit = qd.getConjunctionCriterion(); List<Criterion> criterionList = conCrit.getCriterionList(); //页面查询条件 String jflx = new String(); String jfsjStart = new String(); String jfsjEnd = new String(); String xh = new String();; String xm = new String();; String sfzh = new String();; String njdm = new String();; String xqdm = new String();; String dwh = new String();; String zydm = new String();; String bjdm = new String();; for (Criterion criterion : criterionList) { AttributeDescriptor attrDescriptor = ((AttributeCriterion)criterion).getAttribute(); if (attrDescriptor.getName().contains("Jflx") && !((AttributeCriterion)criterion).getValues().get(0).equals("")) { jflx = String.valueOf(((AttributeCriterion)criterion).getValues().get(0)); } if (attrDescriptor.getName().contains("CreateTime")) { if(((AttributeCriterion)criterion).getValues().get(0) != null){ jfsjStart = String.valueOf(((AttributeCriterion)criterion).getValues().get(0)); if(jfsjStart.length() >19){ //取消时间字符串秒后面的数字 jfsjStart = jfsjStart.substring(0, 19); } } if(((AttributeCriterion)criterion).getValues().get(1) != null){ jfsjEnd = String.valueOf(((AttributeCriterion)criterion).getValues().get(1)); if(jfsjEnd.length() >19){ //取消时间字符串秒后面的数字 jfsjEnd = jfsjEnd.substring(0, 19); } } } if (attrDescriptor.getName().contains("Xh") && ((AttributeCriterion)criterion).getValues().get(0) != null) { xh = (String)((AttributeCriterion)criterion).getValues().get(0); } if (attrDescriptor.getName().contains("Xm") && ((AttributeCriterion)criterion).getValues().get(0) != null) { xm = (String)((AttributeCriterion)criterion).getValues().get(0); } if (attrDescriptor.getName().contains("Sfzh") && ((AttributeCriterion)criterion).getValues().get(0) != null) { sfzh = (String)((AttributeCriterion)criterion).getValues().get(0); } if (attrDescriptor.getName().contains("Nj") && !((AttributeCriterion)criterion).getValues().get(0).equals("")) { njdm = vo.getNamedWhereClauseParam("p_nj").toString(); } if (attrDescriptor.getName().contains("Xqdm") && !((AttributeCriterion)criterion).getValues().get(0).equals("")) { xqdm = vo.getNamedWhereClauseParam("p_xqdm").toString(); } if (attrDescriptor.getName().contains("Yxdm") && !((AttributeCriterion)criterion).getValues().get(0).equals("")) { dwh = vo.getNamedWhereClauseParam("p_dwh").toString(); } if (attrDescriptor.getName().contains("Zydm") && !((AttributeCriterion)criterion).getValues().get(0).equals("")) { zydm = vo.getNamedWhereClauseParam("p_zydm").toString(); } if (attrDescriptor.getName().contains("Bjdm") && !((AttributeCriterion)criterion).getValues().get(0).equals("")) { bjdm = vo.getNamedWhereClauseParam("p_bjdm").toString(); } } //System.out.println("jflx:"+jflx+",jfsjStart:"+jfsjStart+",jfsjEnd:"+jfsjEnd+",xh:"+xh+",xm:"+xm+",sfzh:"+sfzh+",njdm:"+njdm+",xqdm:"+xqdm+",dwh:"+dwh+",zydm:"+zydm+",bjdm:"+bjdm); try { SfxtglAMImpl am = (SfxtglAMImpl)ADFUtils.findIterator("SfglXsxxVo1Iterator").getViewObject().getApplicationModule(); String stmt = "BEGIN SFGL_XSXX_QUERY(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?); END;"; java.sql.CallableStatement st = null; try { st = am.getDBTransaction().createCallableStatement(stmt, 0); st.setString(1, jflx); st.setString(2, jfsjStart); st.setString(3, jfsjEnd); st.setString(4, xh); st.setString(5, xm); st.setString(6, sfzh); st.setString(7, njdm); st.setString(8, xqdm); st.setString(9, dwh); st.setString(10, zydm); st.setString(11, bjdm); st.registerOutParameter(12, Types.CHAR); //yjfy 应缴费用 st.registerOutParameter(13, Types.CHAR); //yjje已缴金额 st.registerOutParameter(14, Types.CHAR); //jmfy 减免费用 st.registerOutParameter(15, Types.CHAR); //qf 欠费 st.execute(); JSFUtils.setExpressionValue("#{bindings.Totalyjfy.inputValue}", st.getString(12)==null?"0":st.getString(12)); JSFUtils.setExpressionValue("#{bindings.Totalyjje.inputValue}",st.getString(13)==null?"0":st.getString(13)); JSFUtils.setExpressionValue("#{bindings.Totaljmfy.inputValue}", st.getString(14)==null?"0":st.getString(14)); JSFUtils.setExpressionValue("#{bindings.Totalqf.inputValue}", st.getString(15)==null?"0":st.getString(15)); JSFUtils.refresh(richTable); } catch (java.sql.SQLException s) { s.printStackTrace(); throw new oracle.jbo.JboException(s); } finally { try { if (st != null) { st.close(); } } catch (java.sql.SQLException s2) { throw new oracle.jbo.JboException(s2); } } } catch (Exception e) { log.severe(e); } }

create or replace procedure SFGL_XSXX_QUERY(p_jflx in varchar2, p_jfsjStart in varchar2, p_jfsjEnd in varchar2, p_xh in varchar2, p_xm in varchar2, p_sfzh in varchar2, p_njdm in varchar2, p_xqdm in varchar2, p_dwh in varchar2, p_zydm in varchar2, p_bjdm in varchar2, o_totalYjfy out varchar2, o_totalYjje out varchar2, o_totalJmfy out varchar2, o_totalQf out varchar2) is /** * 自定义学杂费查询 * 功能：传入条件参数查询 * 2015年12月4日 * p_jflx 缴费类型 * p_jfsjStart 缴费开始时间 * p_jfsjEnd 缴费结束时间 * p_xh 学号 * p_xm 姓名 * p_sfzh 身份证 * p_njdm 年级 * p_xqdm 校区 * p_dwh 院系 * p_zydm 专业代码 * p_bjdm 班级代码 * o_totalYjfy 合计应缴费用 * o_totalYjje 合计已缴金额 * o_totalJmfy 合计减免费用 * o_totalQf 合计欠费 */ v_sql STRING(3000); --存放查询语句 v_dqxn varchar2(20); --当前学年 xsxx_rec SFGL_SUMTEMP%rowtype; --创建与SFGL_SUMTEMP相同类型的临时集合 begin SELECT xndm into v_dqxn FROM sfgl_xn WHERE sfdqxn=1; --当前学年 --根据查询条件初始化的游标语句 v_sql := 'SELECT ''1'' zj, trim(DECODE(sum(yjfy),0,''0.00'',TO_CHAR(sum(yjfy),''9,999,999,999.99''))) yjfy, trim(DECODE(sum(yjje),0,''0.00'',TO_CHAR(sum(yjje),''9,999,999,999.99''))) yjje, trim(DECODE(sum(qf),0,''0.00'',TO_CHAR(sum(qf),''9,999,999,999.99''))) qf, trim(DECODE(sum(jmfy),0,''0.00'',TO_CHAR(sum(jmfy),''9,999,999,999.99''))) jmfy FROM ( SELECT sfglxsxx.xm, sfglxsxx.nj, (nvl(SUM(decode(a.fylx, 1, a.fy)), 0) + nvl(SUM(decode(a.fylx, 2, a.fy)), 0) + nvl(SUM(decode(a.fylx, 3, a.fy)), 0) + nvl(SUM(decode(a.fylx, 4, a.fy)), 0)) yjfy, --应缴费用=学费+住宿费+医保费+其他费用 nvl(SUM(a.yjfy), 0) yjje, --已缴费用 (nvl(SUM(decode(a.fylx, 1, a.fy)), 0) + nvl(SUM(decode(a.fylx, 2, a.fy)), 0) + nvl(SUM(decode(a.fylx, 3, a.fy)), 0) + nvl(SUM(decode(a.fylx, 4, a.fy)), 0) - nvl(SUM(a.yjfy), 0)) qf, --欠费=应缴费用-已缴费用 nvl(SUM(jl.je), 0) jmfy, --减免费用 a.xn FROM sfgl_xsxx sfglxsxx, sfgl_yjfy a, (SELECT sum(t.je) je, t.yjfyid, t.xn FROM sfgl_jfjl t WHERE t.jflx = ''3'' group by t.yjfyid, t.xn) jl WHERE sfglxsxx.xszt = ''01'' AND sfglxsxx.xsid = a.yjyh(+) AND a.xn(+) = '''||v_dqxn||''' AND a.xn = jl.xn(+) AND a.yjfyid = jl.yjfyid(+) '; if nvl(p_xh, 'N') <> 'N' then v_sql := v_sql || ' and sfglxsxx.xh = ''' || p_xh || ''''; end if; if nvl(p_xm, 'N') <> 'N' then v_sql := v_sql || ' and sfglxsxx.xm = ''' || p_xm || ''''; end if; if nvl(p_sfzh, 'N') <> 'N' then v_sql := v_sql || ' and sfglxsxx.sfzh = ''' || p_sfzh || ''''; end if; if nvl(p_njdm, 'N') <> 'N' then v_sql := v_sql || ' and sfglxsxx.nj = ''' || p_njdm || ''''; end if; if nvl(p_xqdm, 'N') <> 'N' then v_sql := v_sql || ' and sfglxsxx.xqdm = ''' || p_xqdm || ''''; end if; if nvl(p_dwh, 'N') <> 'N' then v_sql := v_sql || ' and sfglxsxx.yxdm = ''' || p_dwh || ''''; end if; if nvl(p_zydm, 'N') <> 'N' then v_sql := v_sql || ' and sfglxsxx.zydm = ''' || p_zydm || ''''; end if; if nvl(p_bjdm, 'N') <> 'N' then v_sql := v_sql || ' and sfglxsxx.bjdm = ''' || p_bjdm || ''''; end if; if nvl(p_jflx, 'N') <> 'N' or nvl(p_jfsjStart, 'N') <> 'N' or nvl(p_jfsjEnd, 'N') <> 'N' then v_sql := v_sql || ' and exists( SELECT 1 FROM sfgl_yjfy syjfy,sfgl_jfjl sjfjl WHERE syjfy.yjfyid = sjfjl.yjfyid and syjfy.yjyh = sfglxsxx.xsid '; if nvl(p_jflx, 'N') <> 'N' then v_sql := v_sql || ' and sjfjl.jflx = ''' || p_jflx || ''''; end if; if nvl(p_jfsjStart, 'N') <> 'N' then v_sql := v_sql || ' and sjfjl.create_time >= to_date('''||p_jfsjStart||''',''yyyy-MM-dd HH24:mi:ss'')'; end if; if nvl(p_jfsjEnd, 'N') <> 'N' then v_sql := v_sql || ' and sjfjl.create_time <= to_date('''||p_jfsjEnd||''',''yyyy-MM-dd HH24:mi:ss'')'; end if; v_sql := v_sql || ' )'; end if; v_sql :=v_sql||' GROUP BY sfglxsxx.xm, sfglxsxx.nj, a.xn ORDER BY sfglxsxx.nj desc )'; /* dbms_output.put_line('查询语句：'||v_sql);*/ execute immediate v_sql into xsxx_rec; o_totalYjfy:=xsxx_rec.yjfy; o_totalYjje:=xsxx_rec.yjje; o_totalJmfy:=xsxx_rec.jmfy; o_totalQf:=xsxx_rec.qf; /*dbms_output.put_line('yjfy:'||o_totalYjfy||',yjje:'||o_totalYjje||',jmfy:'||o_totalJmfy||',qf:'||o_totalQf); */ exception when others then dbms_output.put_line('程序运行出现内部错误，请联系管理员。'||dbms_utility.format_error_backtrace()||'---'||SQLCODE||'---'||SQLERRM); raise; end SFGL_XSXX_QUERY;

重写queryListener

Overriding default query listener ,field validation of af:query- Oracle ADF

你可能感兴趣的:(重写queryListener)