package org.lcsim.geometry.compact;
   
   import org.jdom.DataConversionException;
   import org.jdom.Element;
   
   /**
    * The class created when a constant definition is found in the XML file.
    * @author tonyj
    */
  public class Constant
  {
     private String name;
     private double value;
     
     public Constant(String name, double value)
     {
  	   this.name = name;
  	   this.value = value;
     }
     
     /**
      * Construct a new Constant
      * @param constant The JDOM element corresponding to the constant definition.
      * @throws org.jdom.DataConversionException If an XML error occurs while handling the node.
      */
     protected Constant(Element constant) throws DataConversionException
     {
        name = constant.getAttributeValue("name");
        value = constant.getAttribute("value").getDoubleValue();
     }
     /**
      * Get the name of this constant
      * @return The name.
      */
     public String getName()
     {
        return name;
     }
     /**
      * The value of this constant (after expression evaluation).
      * @return The value.
      */
     public double getValue()
     {
        return value;
     }
  }