truetag.java

来自「招标投标网上系统」· Java 代码 · 共 28 行

/*
 * $Id: TrueTag.java,v 1.1 2001/10/12 00:53:55 ro89390 Exp $
 * Copyright 2001 Sun Microsystems, Inc. All rights reserved.
 */

package com.neusoft.taglibs.smart;

import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;

/**
 * Tag showing its body if its parent (ConditionalTag) is true.
 */
public class TrueTag
    extends TagSupport {

  public int doStartTag() throws JspTagException {
    boolean value = ( (ConditionalTag)
                     findAncestorWithClass(this, ConditionalTag.class))
        .getValue();
    return value ? EVAL_BODY_INCLUDE : SKIP_BODY;
  }

  public int doEndTag() throws JspTagException {
    return EVAL_PAGE;
  }
}