Question

我正在努力想出一个能在列中找到两个值的Expression。我正在使用JBoss 4.2.2，JSF 1.2，RichFaces 3.3。

在这两个例子中：

    "personData.status in (#{personSortDataList.statusChoice == 'A' ? " 
        + "personSortDataList.statusChoice : null})", 

    "personData.status in (#{personSortDataList.statusChoice == 'I' ? " 
        + "personSortDataList.statusChoice : null})",

效果很好。当我尝试将它们组合时：

        "#{personSortDataList.statusChoice == 'B' ? " 
        + "(personData.status in (A, I) : null})", // Done this several different ways

我无法弄清楚用什么类型的表达来同时引入A和I.这些查询附加到h：selectOneRadio：

     <h:panelGrid columns="2">
        <b>#{messages['Status']}: </b>
        <h:selectOneRadio layout="lineDirection" 
                    value="#{personSortDataList.statusChoice}">             
            <f:selectItem itemLabel="#{messages['Active']}" itemValue="A" />
            <f:selectItem itemLabel="#{messages['Inactive']}" itemValue="I" />
            <f:selectItem itemLabel="#{messages['Active and Inactive']}" itemValue="B" />
      </h:selectOneRadio>  
    </h:panelGrid>

对于bean，我有（除了查询）：

    @Name("personSortDataList")
     public class PersonSortDataList extends EntityQuery<PersonData>
     {
    private static final long serialVersionUID = 1L;

...

    private Character statusChoice;

...



    private static final String EJBQL = "Select personData From PersonData personData";

    private static final String[] RESTRICTIONS =
    {

...


        "personData.status in (#{personSortDataList.statusChoice == 'A' ? " 
            + "personSortDataList.statusChoice : null})", 

        "personData.status in (#{personSortDataList.statusChoice == 'I' ? " 
            + "personSortDataList.statusChoice : null})", 

        "#{personSortDataList.statusChoice == 'B' ? " 
            + "(personData.status in (A, I) : null}", 

...


};

    public CIMinMax ciMinMax;

    public CIMinMax getCiMinMax() 
    {
        return ciMinMax;
    }


    public void setCiMinMax(CIMinMax ciMinMax) 
    {
        this.ciMinMax = ciMinMax;
    }

    private PersonData personData;


    public PersonSortDataList()
    {

        personData = new PersonData();
        personData.setId(new PersonDataId());
        ciMinMax = new CIMinMax();
        setEjbql(EJBQL);
        setRestrictionExpressionStrings(Arrays.asList(RESTRICTIONS));
        setMaxResults(Integer.valueOf(300));
    }


    public PersonData getPersonData() {
        return personData;
    }


    public void setPersonData(PersonData personData) {
        this.personData = personData;
    }



    @Override
    protected String getCountEjbql()
    {
        setUseWildcardAsCountQuerySubject(true);
        return super.getCountEjbql();
    }

...


    public void setStatusChoice(Character statusChoice) {
        this.statusChoice = statusChoice;
    }

    public Character getStatusChoice() {
        return statusChoice;
    }
}

非常感谢任何帮助！

Answer 1

我的同事找到了解决方案：

"not (personData.status not in (#{personSortDataList.statusChoice == 'B' ? " 
       + "'A' : null})",

"personData.status not in (#{personSortDataList.statusChoice == 'B' ? " 
       + "'I' : null}))",

到目前为止这是正常的

使用Seam的表达式语言中的EJB-QL：查找多个值

1 个答案: