是否可以在复合组件中调用参数化方法签名？

Question

我目前正在创建一个JSF复合组件,其方法签名可以接受参数.

这是摘录:

<composite:interface>
    ....
    <composite:attribute name="activateHeroMethod" method-signature="java.util.List action(id.co.sofcograha.core.Dto, id.co.sofcograha.core.Dto)" />
</composite:interface>

<composite:implementation>
    ....
    <p:commandLink value="#{hero.map['heroName']}"
        process="@this"
        update="#{cc.attrs.update}"
        oncomplete="infoRaceDialog.hide()"
        image="ui-icon ui-icon-search">
        <f:setPropertyActionListener value="#{hero}"
            target="#{cc.attrs.activateHeroMethod(infoRaceBean.race, hero)}" />
    </p:commandLink>
    ....
</composite:implementation>

target ="#{cc.attrs.activateHeroMethod(infoRaceBean.race,hero)}"因以下错误消息而失败:

javax.faces.view.facelets.TagAttributeException: /resources/sofco/infoRace.xhtml @57,76 target="#{cc.attrs.activateHeroMethod(infoRaceBean.race, hero)}" /resources/sofco/infoRace.xhtml @57,76 target="#{cc.attrs.activateHeroMethod(infoRaceBean.race, hero)}" Illegal attempt to pass arguments to a composite component lookup expression (i.e. cc.attrs.[identifier]).
        at com.sun.faces.facelets.tag.TagAttributeImpl.getValueExpression(TagAttributeImpl.java:401)
        at com.sun.faces.facelets.tag.TagAttributeImpl.getValueExpression(TagAttributeImpl.java:351)
        at com.sun.faces.facelets.tag.jsf.core.SetPropertyActionListenerHandler.applyAttachedObject(SetPropertyActionListenerHandler.java:128)
        at com.sun.faces.facelets.tag.jsf.core.SetPropertyActionListenerHandler.apply(SetPropertyActionListenerHandler.java:101)

是否可以从复合组件的属性中调用参数化方法？我认为我可以处理多个作为在一个方法中使用多个参数的解决方法,但我不喜欢这种方法,因为它会随着参数的增加而变大.

我可以将每个参数包装成1个包装器对象,但我仍然很好奇是否有办法解决调用多个参数的方法的问题.

请分享你的想法!

谢谢.

Answer 1

是的可以做到这一点,这样做:

<composite:interface displayName="Image uploader with preview list">
        <composite:attribute name="backingBean" required="true" />
        <composite:attribute name="imageType" required="true"  />
</composite:interface>
....
<p:commandButton  value="Save"  actionListener="#{cc.attrs.backingBean.imageUploaded(cc.attrs.imageType)}"/>

希望这有助于一些身体.