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14.8 Using Nested Tags

345

Listing 14.23 IfTag.java 

package coreservlets.tags;

import javax.servlet.jsp.*;

import javax.servlet.jsp.tagext.*;

import java.io.*;

import javax.servlet.*;

/** A tag that acts like an if/then/else.

 */

public class IfTag extends TagSupport {

  private boolean condition;

  private boolean hasCondition = false;

  public void setCondition(boolean condition) {

    this.condition = condition;

    hasCondition = true;

  }

  public boolean getCondition() {

    return(condition);

  }

  public void setHasCondition(boolean flag) {

    this.hasCondition = flag;

  }

  /** Has the condition field been explicitly set? */

  public boolean hasCondition() {

    return(hasCondition);

  }

  public int doStartTag() {

    return(EVAL_BODY_INCLUDE);

  }

}

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