如何以编程方式创建命令链接

问题描述

我们有一个基于接缝/richfaces的系统.在此网页上，表格是根据动态上下文(来自多个不同的数据源，并且每个表格使用不同的布局来表示本质上相同的现实概念)呈现的.结果，该表被绑定到一个bean，并且它的列/布局是从这个bean生成的.

We have a system built on seam/richfaces.There's this webpage where the tables are rendered from dynamic context (from multiple different datasources, and each of them uses a different layout to represent essentially the same real world concept). As a result, this table is binded to a bean, and it's columns/layout are generated from this bean.

现在，我需要在特定列上添加一个命令链接，该链接等效于

Now I need to add a command link on a specific column, equivalent to

<a4j:commandLink value="#{actBean.Ids}" action="#{actBean.genDetails}">
    <f:setPropertyActionListener target="#{actBean.Ref}" value="#{cont}"/>
</a4j:commandLink>

在JSF页面中.

使用

HtmlDataTable dataTable = new HtmlDataTable();
HtmlColumn column = new Column();
//some code to setup column name, value etcs
dataTable.getChildren().add(column);
//What do I do here to bind a commandlink with a property action
//listener to column?

我的问题是，我该如何以编程方式做到这一点?

My question is, how do I do this programmatically?

谢谢！

推荐答案

HtmlAjaxCommandLink commandLink = new HtmlAjaxCommandLink();
commandLink.addActionListener(new SetPropertyActionListener(target, value));
column.getChildren().add(commandLink);

，其中target和value是ValueExpression.这些可以通过以下方式创建:

where target and value are ValueExpression's. These can be created with:

ExpressionFactory.getInstance().createValueExpression(ctx, expression, expectedType)

然后可以通过FacesContext.getCurrentContext().getELContext()

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