utilvalidationdelegate.java

博克后台的开发,有很多使用的方法和例子可以提供给大家学习

package com.common.util;
 
import org.apache.tapestry.IMarkupWriter;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.form.IFormComponent;
import org.apache.tapestry.valid.IValidator;
import org.apache.tapestry.valid.ValidationDelegate;

/**
 * description: ValidationDelegate的子类，当调用的分页页面出错时，报出准确的出错信息
 * 
 * Created on 2005-8-01
 * @author WuQiaoYun 
 */
public class UtilValidationDelegate extends ValidationDelegate {

	/**
	 * 调用该方法把属性值写入writer对象的标签中。
	 */
	public void writeAttributes(IMarkupWriter writer, IRequestCycle cycle,
            IFormComponent component, IValidator validator) {
        if (isInError(component)) {
        	writer.begin("span");
            writer.attribute("class", "field-error");
        }
    }
   
    /**
     * Default implementation; 如果当前领域出错的话，则调用该方法，把相关的错误信息给出。     
     * 例如: <code>&amp;nbsp;&lt;font color="red"&gt;**&lt;/font&gt;</code>.
     */
    public void writeSuffix(IMarkupWriter writer, IRequestCycle cycle, IFormComponent component,
            IValidator validator)
    {
    	//System.out.println("aaa=========="+cycle);
/*        if (isInError())
        {
            writer.printRaw("&nbsp;");
            writer.begin("font");
            writer.attribute("color", "red");
            writer.print("");            
//            writer.print(PropertyLoader.getPptValue(Constants.RES_SECURITY_MESSAGE_FILENAME,"resource_UtilValidationDelegate_001"));
            writer.end();
            
        }*/
    }

    /**
     * If the form component is in error, places a &lt;font color="red"&lt; around it. 
     * Note: this will only work on the render phase after a rewind, and will be confused 
     * if components are inside any kind of loop.
     * 
     */
    public void writeLabelPrefix(IFormComponent component,
            IMarkupWriter writer, IRequestCycle cycle) {
    	//System.out.println("--------------writeLabelPrefix................");
        if (isInError(component)) {
            writer.begin("span");
            writer.attribute("class", "label-error");
        }
    }

    /**
     * Closes the &lt;font&gt; element,started by
     * {@link #writeLabelPrefix(IFormComponent,IMarkupWriter,IRequestCycle)}, 
     * if the form component is in error.
     * 
     */
    public void writeLabelSuffix(IFormComponent component,
            IMarkupWriter writer, IRequestCycle cycle) {
        if (isInError(component)) writer.end();        
    } 
    
}