如何基于标志启用/禁用selecManyCheckbox中的项目 [英] How to enable/disable item in selecManyCheckbox based on flag

问题描述

我需要您的帮助来禁用和启用jsf页面中selectManyCheckbox组件中的项目.首先，selectManyCheckbox组件显示三个复选框(贷款-健康-转移).该列表将从具有以下代码的Bean中填充:

I need your help in disabling and enabling an item from the selectManyCheckbox component in a jsf page. First of all, the selectManyCheckbox component is showing three chechboxes which are (Loan - Health - Transfer). The list will be populated from a bean which it has the code:

private List<hrCertificate> hrCertificatesList = new ArrayList<hrCertificate>(); 

//Getter and Setter

Private String loanFlag="";

@PostConstruct
public void init() {

    this.hrCertificatesList.add(new hrCertificate(("Loan"), "LC"));
    this.hrCertificatesList.add(new hrCertificate(("Health"), "HI"));
    this.hrCertificatesList.add(new hrCertificate(("Trasnfer"), "TE"));    
}

在同一个bean中，我将运行一条SQL语句，该语句将返回Yes或No，并将该值添加到loanFlag变量中.因此，如果flag ="Y"，则需要启用贷款复选框，以便用户可以选择它，否则我需要从selectManyCheckbox禁用它.问题是我在应用禁用和启用项目selectManyCheckbox的逻辑时遇到困难，我在上面的代码中列出并始终启用它们.

In the same bean, I will be running a SQL statement that will return either Yes or No and that value I am adding it to the loanFlag variable.So if the flag="Y", I need to enable the loan checkbox so the user can select it else I need to disable it from the selectManyCheckbox. The issue is that I am facing difficulties in applying the logic to disable and to enable the item selectManyCheckboxwhere in the above code I am listing and enabling them all the time.

selectManyChexkbox的代码:

The code for the selectManyChexkbox:

 <p:selectManyCheckbox id="hrCertificates" value="#{user.selectedHRCertificates}" layout="pageDirectio>
     <f:selectItems value="#{user.hrCertificatesList}" 
         var="hrCertificate" itemLabel="#{hrCertificate.hrCertificateName}"
         itemValue="#{hrCertificate.hrCertificateCode}"/>

 </p:selectManyCheckbox>

那么如何运用逻辑

推荐答案

您可以编辑hrCertificate类以添加disabled布尔字段吗?如果是，则可以将itemDisabled="#{hrCerticate.disabled}"添加到f:selectItems中，这应该是最简单的解决方案.

Could you edit your hrCertificate class to add a disabled boolean field? If yes, then you can add itemDisabled="#{hrCerticate.disabled}" to your f:selectItems which should be the easiest solution.

另一种选择是使用Map<hrCertificate, Boolean>代替List<hrCertificate>.

Another option would be to use a Map<hrCertificate, Boolean> instead of a List<hrCertificate>.

private Map<hrCertificate, Boolean> hrCertificatesMap = new HashMap<hrCertificate, Boolean>();

@PostConstruct
public void init() {
     hrCertificatesMap.put(new hrCertificate(("Loan"), "LC"), null);
     hrCertificatesMap.put(new hrCertificate(("Health"), "HI"), null);
     hrCertificatesMap.put(new hrCertificate(("Trasnfer"), "TE"), null);
 }

 // Then when you're done with your SQL query, update your Map to add the corresponding boolean values...

.xhtml

<p:selectManyCheckbox id="hrCertificates" value="#{user.selectedHRCertificates}" layout="pageDirectio>
    <f:selectItems value="#{user.hrCertificatesMap.keySet().toArray()}" var="hrCertificate" itemLabel="#{hrCertificate.hrCertificateName}" itemValue="#{hrCertificate.hrCertificateCode}" itemDisabled="#{user.hrCertificatesMap.get(hrCertificate)}" />
</p:selectManyCheckbox>

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