defaulttei.java

Servlet与JSP核心编程原码,适合刚做软件开发的程序员参考！

package examples;

import javax.servlet.jsp.tagext.*;

/**
 * A TagExtraInfo class that can be used when the tag defines an object
 * using an id.
 *
 * The tag is expected to have an optional attribute with name id.
 * The scope is from the end of the tag.
 */

public class DefaultTEI extends TagExtraInfo {
  
    /**
     * Constructor
     */
    public DefaultTEI() {
	super();
    }

    /**
     * information on scripting variables defined by this tag
     *
     * @param data The translation-time TagData instance.
     */
    public VariableInfo[] getVariableInfo(TagData data) {
	String idValue = data.getId();

	if (idValue == null) { 
	    return new VariableInfo[0];
	} else {
	    VariableInfo info
		= new VariableInfo(idValue,
				   "java.lang.String",
				   true,
				   VariableInfo.AT_END);
	    VariableInfo[] back = { info } ;
	    return back;
	}
    }

    /**
     * Translation-time validation of the attributes.  The argument is a
     * translation-time, so request-time attributes are indicated as such.
     *
     * @param data The translation-time TagData instance.
     */

    public boolean isValid(TagData data) {
	return true;
    }



}