package com.instantbank.collections.main.web;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.TagSupport;
import org.w3c.dom.Node;

public class GetElementValueTag extends TagSupport {
  private Node element = null;


  public void setElement(Node element) {
    this.element = element;
  }


  public void setId(String id) {
    this.id = id;
  }


  public int doStartTag() throws JspException {
    if(element.getNodeType() == Node.ELEMENT_NODE) {
      String value = getElementText(element);
      pageContext.setAttribute(id, value);
    }
    else {
      throw new JspException("Node must be an element");
    }
    return EVAL_PAGE;
  }


  public void release() {
    element = null;
  }


  public String getElementText(Node element) {
    Node child = element.getFirstChild();
    String text = null;

    if(child != null) {
      text = child.getNodeValue();
    }

    return text;
  }
}