Reviews : Adding Spice to Struts :

The Final Solution…

The final solution we came up with will include an extra <form-property> named "includes" specifying the form bean name to be included. Thus, the new solution will look like this:

<form-bean
name="ShipForm" type="our own form bean">

<form-property name="includes"
type="java.lang.String" initial="anotherForm"/>

</form-bean>

This new <form-property> must have the name "includes" and the initial value of this property must hold the name of the form bean that we want to include. With this idea in mind, we ventured to write a new ActionForm class.

The CustomDynaForm class

We decided to create a class called CustomDynaForm, which will extend the original Struts DynaActionForm class. We will override the initialize() method of the DynaActionForm class to include all the properties from another form bean. Listing –2 is the source code for the new CustomDynaForm class.

package custom.struts;

import org.apache.struts.action.DynaActionForm;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.config.FormBeanConfig;
import org.apache.struts.config.FormPropertyConfig;
public class CustomDynaForm extends DynaActionForm
{
     /**
      * override the initialize() method
     */
    public void initialize(ActionMapping mapping)
    {
        super.initialize(mapping);

        //form bean name

        String name = mapping.getName();

        //form bean config

     FormBeanConfig config = mapping.getModuleConfig()
.findFormBeanConfig(name);

        //now check if there is "includes" property

        FormPropertyConfig propConfig = config.findFormPropertyConfig("includes");
        if (propConfig != null)
        {
              //get the initial values
        String formBeanToInclude = propConfig.getInitial();
        FormBeanConfig formBeanConfig =
        mapping.getModuleConfig().findFormBeanConfig(formBeanToInclude);
        FormPropertyConfig properties[] =
        formBeanConfig.findFormPropertyConfigs();
            for (int i = 0; i < properties.length; i++)
            {
                //set(properties[i].getName(), properties[i].initial());

                this.getMap().put(properties[i].getName(), properties[i].getInitial());
            }
        }
    }
}

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