com.ibm.portal.struts.action
Class LookupDispatchAction

java.lang.Object
  Action
      com.ibm.portal.struts.action.StrutsAction
          com.ibm.portal.struts.action.DispatchAction
              com.ibm.portal.struts.action.LookupDispatchAction

public abstract class LookupDispatchAction
extends DispatchAction

A portal friendly implementation of the LookupDispatchAction class. The following comments are from the Struts LookupDispatchAction javadoc

An abstract Action that dispatches to the subclass mapped execute method. This is useful in cases where an HTML form has multiple submit buttons with the same name. The button name is specified by the parameter property of the corresponding ActionMapping. To configure the use of this action in your struts-config.xml file, create an entry like this:

   <action path="/test"
           type="org.example.MyAction"
           name="MyForm"
          scope="request"
          input="/test.jsp"
      parameter="action"/>
 

which will use the value of the request parameter named "action" to locate the corresponding key in ApplicationResources. For example, you might have the following ApplicationResources.properties:

    button.add=Add Record
    button.delete=Delete Record
  

And your JSP would have the following format for submit buttons:

   <html:form action="/test">
    <html:submit property="action">
      <bean:message key="button.add"/>
    </html:submit>
    <html:submit property="action">
      <bean:message key="button.delete"/>
    </html:submit>
  </html:form>
  

Your subclass must implement both getKeyMethodMap and the methods defined in the map. An example of such implementations are:

  protected Map getKeyMethodMap() {
      Map map = new HashMap();
      map.put("button.add", "add");
      map.put("button.delete", "delete");
      return map;
  }

  public ActionForward add(ActionMapping mapping,
          ActionForm form,
          PortletRequest request )
          throws IOException, ServletException {
      // do add
      return mapping.findForward("success");
  }

  public ActionForward delete(ActionMapping mapping,
          ActionForm form,
          PortletRequest request )
          throws IOException, ServletException {
      // do delete
      return mapping.findForward("success");
  }
  

Notes - If duplicate values exist for the keys returned by getKeys, only the first one found will be returned. If no corresponding key is found then an exception will be thrown.

Since:

5.1

Field Summary

protected java.util.Map	keyMethodMap Resource key to method name lookup.
protected java.util.Map	localeMap Reverse lookup map from resource value to resource key.

Fields inherited from class com.ibm.portal.struts.action.DispatchAction

clazz, log, messages, methods, types

Constructor Summary

LookupDispatchAction()
Constructor for this class

Method Summary

ActionForward	execute(ActionMapping mapping, ActionForm form, ActionRequest request, ActionResponse response) Execute the Struts action.
protected abstract java.util.Map	getKeyMethodMap() Provides the mapping from resource key to method name.

Methods inherited from class com.ibm.portal.struts.action.DispatchAction

dispatchMethod, getMethod, unspecified

Methods inherited from class com.ibm.portal.struts.action.StrutsAction

sendError, sendError, sendError, sendError, sendError, sendError

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

localeMap

protected java.util.Map localeMap

Reverse lookup map from resource value to resource key.

keyMethodMap

protected java.util.Map keyMethodMap

Resource key to method name lookup.

Constructor Detail

LookupDispatchAction

public LookupDispatchAction()

Constructor for this class

Method Detail

execute

public ActionForward execute(ActionMapping mapping,
                             ActionForm form,
                             ActionRequest request,
                             ActionResponse response)
                      throws java.lang.Exception

Execute the Struts action.

Overrides:

execute in class DispatchAction

Parameters:

mapping - The ActionMapping used to select this instance

form - The optional ActionForm bean for this request (if any)

request - The Portlet request we are processing

response - The Portlet response we are processing

Returns:

Describes where and how control should be forwarded, can be null

Throws:

java.lang.Exception - if the application business logic throws an exception

getKeyMethodMap

protected abstract java.util.Map getKeyMethodMap()

Provides the mapping from resource key to method name.

Returns:

Resource key / method name map.