通过复合组件传递MethodParameter [英] Pass MethodParameter through Composite Components
问题描述
这是我在Composite中的代码:
Here my Code from the Composite:
<cc:attribute name="step" type="Get.Model.Step"/>
<cc:attribute name="removeQuantityAction" />
[...]
<p:dataList id="quantities" value="#{cc.attrs.Quantities}" var="quantity" itemType="disc">
<com:Quantity removeQuantityAction="#{cc.attrs.removeQuantityAction(cc.attrs[step],quantity)}" />
</p:dataList>
我也尝试过:
removeQuantityAction="#cc.attrs.removeQuantityAction(cc.attrs.step,quantity)}"
但我知道
/resources/Get.comp/Step.xhtml @ 51,156 removeQuantityAction =#{cc.attrs.removeQuantityAction(cc.attrs.step，quantity)}""/resources/Get.comp/Step.xhtml @ 51,156 removeQuantityAction = #{cc.attrs.removeQuantityAction(cc.attrs.step，quantity)}"非法尝试将参数传递给复合组件查找表达式(即cc.attrs.[identifier]).
/resources/Get.comp/Step.xhtml @51,156 removeQuantityAction="#{cc.attrs.removeQuantityAction(cc.attrs.step,quantity)}" /resources/Get.comp/Step.xhtml @51,156 removeQuantityAction="#{cc.attrs.removeQuantityAction(cc.attrs.step,quantity)}" Illegal attempt to pass arguments to a composite component lookup expression (i.e. cc.attrs.[identifier]).
方法本身看起来像这样:
The Method itself looks like this:
public void removeQuantity(Step step, Quantity quantity) {}
我该如何解决?
推荐答案
有可能将托管bean的引用和方法名称作为单独的参数传递:
There's the chance of passing managed bean's reference and method names as separate arguments:
父页面:
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:my="http://java.sun.com/jsf/composite/emcomp">
<h:head />
<h:body>
<h:form>
<my:myButton value="Send" methodName="send" beanRefer="#{bean}" />
</h:form>
</h:body>
</html>
复合:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:composite="http://java.sun.com/jsf/composite"
xmlns:h="http://java.sun.com/jsf/html">
<h:body>
<composite:interface>
<composite:attribute name="value" required="true" />
<composite:attribute name="methodName" required="true" />
<composite:attribute name="beanRefer" required="true" />
</composite:interface>
<composite:implementation>
<h:commandButton value="#{cc.attrs.value}"
action="#{cc.attrs.beanRefer[cc.attrs.methodName]}" />
</composite:implementation>
</h:body>
</html>
@ManagedBean
@ViewScoped
public class Bean {
public void send() {
System.out.println("Sent!");
}
}
要为此使用参数，请在在此处使用 @BalusC进行很好的解释，这基本上意味着添加
For using arguments with that, here you have a good explanation by @BalusC, which basically implies adding a setPropertyActionListener to your method call, as you cannot combine dynamic method references with on-the-fly arguments:
<h:commandButton value="#{cc.attrs.value}"
action="#{cc.attrs.beanRefer[cc.attrs.methodName]}">
<f:setPropertyActionListener
target="#{cc.attrs.beanRefer[cc.attrs.targetProperty]}"
value="#{cc.attrs.methodArgument}" />
</h:commandButton>
private String targetProperty;
//Getter and setters
public void send() {
System.out.println("Sent " + targetProperty);
}
这篇关于通过复合组件传递MethodParameter的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
