generatestrutsform.java

来自「Java Pattern Oriented Framework (Jt) 是为了」· Java 代码 · 共 129 行

package Jt.wizard.struts;

import java.util.Collection;
import java.util.LinkedList;

import Jt.JtContext;
import Jt.JtMessage;
import Jt.JtObject;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.DynaActionForm;

/**
 * Creates a form for the Struts framework. 
 */

public class GenerateStrutsForm extends JtObject {
    private static final long serialVersionUID = 1L;

    /*
     * Update the list of errors (objErrors) that
     * should be displayed by the View component (JSP).
     */
    private void handleUIError (String error) {
        Collection col;

        if (error == null)
            return;
        col = (Collection) this.getObjErrors();

        if (col == null) {
            col = new LinkedList ();
            setObjErrors (col);
        }
        col.add(error);

    }
    
    public Object generateView (DynaActionForm form) {

        String className;
        String pack;
        String formName;
        FormGenerator formGenerator = new FormGenerator ();
        Boolean dynaActionForm;

        Object jtReply;

        if (form == null) {
            return (null);            
        }

        //pack = (String) form.get ("pack");      
        //if (pack == null || pack.equals ("")) {
            //handleUIError ("Please enter a package name.");
            //return (null);
        //} 
        //if (pack != null && !pack.equals (""))
        //    formGenerator.setPack(pack);

        className = (String) form.get ("className");

        if (className == null || className.equals ("")) {
            handleUIError ("Please enter a class name.");
            //return (null);
        }    
        formGenerator.setClassName(className);

        formName = (String) form.get ("formName");      
        if (formName == null || formName.equals ("")) {
            handleUIError ("Please enter a form name.");
            //return (null);
        }    
        formGenerator.setFormName(formName);

        if (getObjErrors() != null) {
            return (null);
        }
        
        dynaActionForm = (Boolean) form.get ("dynaActionForm");

        if (dynaActionForm != null) {
            handleTrace ("dynaActionForm:" + dynaActionForm.booleanValue());
            formGenerator.setDynaActionForm(dynaActionForm.booleanValue());
        }

        jtReply = formGenerator.processMessage(new JtMessage (JtObject.JtACTIVATE));

        // Propagate the exception
        if (formGenerator.getObjException() != null)
            this.setObjException(formGenerator.getObjException());

        return (jtReply);
    }

    /**
     * Process object messages.
     * <ul>
     * <li> JtACTIVATE
     * </ul>
     * @param message message
     */

    public Object processMessage (Object message) {
        //Object data;
        JtContext context;
        ActionForm form = null;

        JtMessage e = (JtMessage) message;

        if (e == null ||  (e.getMsgId() == null))
            return (null);

        context = (JtContext) e.getMsgContext();
        if (context != null)
            form = (ActionForm) context.getActionForm();  

        if (e.getMsgId().equals(JtObject.JtACTIVATE)) {

            // pass the form information   
            //data = e.getMsgData ();
            return ( generateView ((DynaActionForm) form));
        }

        return (super.processMessage(message));

    }
}