BaseBean.java :  » J2EE » jfox » com » ibatis » struts » Java Open Source

package com.ibatis.struts;

import java.util.List;
import java.util.Map;

import javax.servlet.ServletRequest;
import javax.servlet.http.HttpServletRequest;

import org.apache.struts.action.ActionError;
import org.apache.struts.action.ActionErrors;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;

/**
 * All actions mapped through the BeanAction class should be mapped to a
 * subclass of BaseBean (or have no form bean mapping at all). <p/>The BaseBean
 * class simplifies the validate() and reset() methods by allowing them to be
 * managed without Struts dependencies. Quite simply, subclasses can override
 * the parameterless validate() and reset() methods and set errors and messages
 * using the ActionContext class. <p/><i>Note: Full error, message and
 * internationalization support is not complete. </i> <p/>Date: Mar 12, 2004
 * 9:20:39 PM
 * 
 * @author Clinton Begin
 */
public abstract class BaseBean extends ActionForm {

    public void reset(ActionMapping mapping, ServletRequest request) {
        ActionContext.initialize((HttpServletRequest) request, null);
        reset();
    }

    public void reset(ActionMapping mapping, HttpServletRequest request) {
        ActionContext.initialize((HttpServletRequest) request, null);
        reset();
    }

    public ActionErrors validate(ActionMapping mapping, ServletRequest request) {
        ActionContext.initialize((HttpServletRequest) request, null);
        ActionContext ctx = ActionContext.getActionContext();
        Map requestMap = ctx.getRequestMap();

        List errorList = null;
        requestMap.put("errors", errorList);
        validate();
        errorList = (List) requestMap.get("errors");
        ActionErrors actionErrors = null;
        if (errorList != null && !errorList.isEmpty()) {
            actionErrors = new ActionErrors();
            actionErrors.add(ActionErrors.GLOBAL_ERROR, new ActionError(
                    "global.error"));
        }
        return actionErrors;
    }

    public ActionErrors validate(ActionMapping mapping,
            HttpServletRequest request) {
        ActionContext.initialize(request, null);
        ActionContext ctx = ActionContext.getActionContext();
        Map requestMap = ctx.getRequestMap();

        List errorList = null;
        requestMap.put("errors", errorList);
        validate();
        errorList = (List) requestMap.get("errors");
        ActionErrors actionErrors = null;
        if (errorList != null && !errorList.isEmpty()) {
            actionErrors = new ActionErrors();
            actionErrors.add(ActionErrors.GLOBAL_ERROR, new ActionError(
                    "global.error"));
        }
        return actionErrors;
    }

    public void validate() {
    }

    public void reset() {
    }

    public void clear() {
    }

    protected void validateRequiredField(String value, String errorMessage) {
        if (value == null || value.trim().length() < 1) {
            ActionContext.getActionContext().addSimpleError(errorMessage);
        }
    }

}