simpleattributetag.java

来自「一个免费wap站」· Java 代码 · 共 43 行

package com.eline.wap.catalog.taglib.wml;

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;

import com.eline.wap.common.util.AppLogger;

public abstract class SimpleAttributeTag extends TagSupport {

	protected Object item = null;
	protected String name = null;

	public int doStartTag() throws JspException {
		// check if itemAttribute tag is in items tag
		SimpleTag simpleTag = (SimpleTag) findAncestorWithClass(this,  SimpleTag.class);
		if (simpleTag == null) {
			throw new JspTagException("SimpleAttributeTag: itemsAttribute tag not inside parent tag");
		}
		item = simpleTag.getItem();

	    // print out attribute
	    try {
	    	JspWriter out = pageContext.getOut();
	    	out.print(createText());
	    } catch(IOException e) {
	        AppLogger.error("SimpleAttributeTag: Error printing attribute: " + e);
	    }

	    // there should be no body to process
	    return SKIP_BODY;
	}

	public void setName(String name) {
		this.name = name;
	}

	protected abstract String createText();
}