textareatag.java

一个实用工具类

/*
 * Copyright (C) butor.com. All rights reserved.
 *
 * This software is published under the terms of the GNU Library General
 * Public License (GNU LGPL), a copy of which has been included with this
 * distribution in the LICENSE.txt file. 
 */


package org.butor.web.taglib.html;

import javax.servlet.jsp.JspException;

import org.apache.struts.util.RequestUtils;
import org.apache.struts.util.ResponseUtils;
import org.butor.web.action.IButorActionForm;

/**
 * @author nacroaz
 *
 * To change this generated comment edit the template variable "typecomment":
 * Window>Preferences>Java>Templates.
 */
public class TextareaTag extends org.apache.struts.taglib.html.TextareaTag {
	protected String keep_format = null;
	public String getKeep_format() {
		return keep_format;
	}
	
	public void setKeep_format(String c) {
		keep_format = c;	
	}

    public int doStartTag() throws JspException {
	   	// Find and check the form bean	    		   	
    	Object o = RequestUtils.lookup(pageContext, name, null);
        if (! (o instanceof IButorActionForm)) {
			ResponseUtils.write(pageContext, "The form bean must be an instance of ButorActionForm !!!");  
			return SKIP_BODY;
        }        
        IButorActionForm form = (IButorActionForm) o;
        
        // If property is enable, use super class definition        
        if (form.getEnabled(property)) {
        	return super.doStartTag();
        } else {        	
        	boolean mustFormat = (keep_format == null) ? true :  keep_format.equals("1");
        	
        	// the property is disable, we must render it properly        	
	        if (value != null) {
	        	TagLibHelper.renderStaticField(pageContext, property, value, mustFormat);
				    	        
	        } else {
	        	// Lookup the property value	        	
    	        Object value = RequestUtils.lookup(pageContext, name, property, null);        	    
        	    if (value == null) {
            	    value = "";
        	    }
        	    
	        	TagLibHelper.renderStaticField(pageContext, property, value.toString(), mustFormat);	        	        	    
	        }	        
        }    	
    	    	
		return (EVAL_BODY_BUFFERED);
    }
}