texttag.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 TextTag extends org.apache.struts.taglib.html.TextTag {		

	protected String f_format = null;
	protected String f_dataType = null;
	protected String f_formatProperty = null;
	protected String f_dataTypeProperty = null;
	
	public void setformat(String fp) {
		f_format = fp;
	}
	public String getformat() {
		return f_format;
	}
	public void setformatProperty(String fpp) {
		f_formatProperty = fpp;
	}
	public String getformatProperty() {
		return f_formatProperty;
	}
	
	public void setDataType(String dt) {
		f_dataType = dt;
	}
	public String getDataType() {
		return f_dataType;
	}
	public void setDataTypeProperty(String dtp) {
		f_dataTypeProperty = dtp;
	}
	public String getDataTypeProperty() {
		return f_dataTypeProperty;
	}
	
	/**
	 * Release all allocated resources.
	 */
	public void release() {
		super.release();
		f_format = null;
		f_dataType = null;
		f_formatProperty = null;
		f_dataTypeProperty = null;
	}
    /**
     * Generate the required input tag.
     * Indexed property since 1.1
     *
     * @exception JspException if a JSP exception has occurred
     */
    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 {
        	// the property is disable, we must render it properly
			if (f_format == null && f_formatProperty != null) {
				f_format = (String) RequestUtils.lookup(pageContext, name, f_formatProperty, null);
			}
			if (f_dataType == null && f_dataTypeProperty != null) {
				f_dataType = (String) RequestUtils.lookup(pageContext, name, f_dataTypeProperty, null);
			}

	        if (value != null) {
				TagLibHelper.renderStaticField(pageContext, property, value, 
					TagLibHelper.format(value, f_dataType, f_format));
				
	        } else if (redisplay || !"password".equals(type)) {
	        	// Lookup the property value
    	        Object propValue = RequestUtils.lookup(pageContext, name, property, null);        	           	    
        	    if (propValue == null) {
					propValue = "";
        	    }

	        	TagLibHelper.renderStaticField(pageContext, property, propValue.toString(),
					TagLibHelper.format(propValue, f_dataType, f_format));
			}	        
        }
			
    	return (EVAL_BODY_BUFFERED);    	
    }	
}