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ActionLink

Creates an <a> hyperlink in the HTML response. If the link is triggered, then the ActionLink retrieves its listener, and invokes actionTriggered() on it.

See the Developers Guide ActionLink and DirectLink listeners for a more complete description.

See also: DirectLink, ExternalLink, GenericLink, PageLink, ServiceLink

Warning
This component has been deprecated and will be removed in the next major release of Tapestry. ActionLink represents an inherently unstable approach, since it can easily be confused by changing server-side state.

Parameters

Name Type Direction Required Default Description
listener IActionListener in yes Specifies an object that is notified when the link is clicked, which is typically a listener method of its container (for example, listeners.method).
disabled boolean in no false Controls whether the link is produced. If disabled, the portion of the template the link surrounds is still rendered, but not the link itself.
stateful boolean in no true If true (the default), then the component requires an active (i.e., non-new) HttpSession when triggered. Failing that, it throws a StaleLinkException. If false, then no check is necessary. The latter works well with links that encode all necessary state inside the URL itself.
anchor String in no The name of an anchor or element to link to. The final URL will have '#' and the anchor appended to it.
scheme String in no The required scheme ("http" or "https", typically) for the URL. This will force the creation of an absolute URL when the current request's scheme does not match the value for this parameter. This is most often used to switch to "https" for secure portions of an application (such as a login page), before switching back to standard "http" for the majority of an application.
renderer ILinkRenderer in no The object which will actually render the link.

Body: rendered

Informal parameters: allowed

Reserved parameters: href

Examples

In this example the ActionLink component enables users to select a Customer from the Customer List table.

ActionLink Screen Shot

HTML template

  <table cellspacing="6">
  <tr>
   <td>ID</td>
   <td>&nbsp;</td>
   <td>Name</td>
   <td>&nbsp;</td>
   <td>Level</td>
  </tr>
  <tr>
   <td colspan="5"><hr></td>
  </tr>
  <tr jwcid="@Foreach" source="ognl:customerList" value="ognl:customer" element="tr">
   <td><span jwcid="@Insert" value="ognl:customer.id"/></td>
   <td>&nbsp;</td>
   <td><span jwcid="@ActionLink" listener="listener:customerSelectAction"> <span jwcid="@Insert" value="ognl:customer.fullName"/> </span></td>
   <td>&nbsp;</td>
   <td><span jwcid="@Insert" value="ognl:customer.memberLevel"/></td>
  </tr>
</table>

Page specification

<property name="customerList" type="java.util.List" persistent="yes"/>
<property name="customer" type="Customer"/>

Java sources

public abstract class SalesPage extends BasePage {
    public abstract List getCustomerList();
    public abstract List setCustomerList(List value);

    public abstract Customer getCustomer();

    public void customerSelectAction(IRequestCycle cycle) {
       Customer customer = getCustomer();
       // Do something with customer
    }
}
public class Customer implements Serializable {
    private Integer id;
    private String fullName;
    private String memberLevel;

    public Customer(Integer id, String fullName, String memberLevel) {
        this.id = id;
        this.fullName = fullName;
        this.memberLevel = memberLevel;
    }

    public Integer getId() { return id; }

    public String getFullName() { return fullName; }

    public String getMemberLevel() { return memberLevel; }
}