package org.lcsim.detector.converter.compact;
   
   import java.io.IOException;
   import java.io.InputStream;
   import java.util.Map.Entry;
   
   import org.jdom.Document;
   import org.jdom.JDOMException;
   import org.jdom.input.SAXBuilder;
  import org.lcsim.units.clhep.Constants;
  import org.lcsim.util.xml.JDOMExpressionFactory;
  
  public class CompactDocumentBuilder
  {
      public static Document build( String resource ) throws JDOMException, IOException
      {
          return build( CompactDocumentBuilder.class.getResourceAsStream( resource ) );
      }
  
      public static Document build( InputStream in ) throws JDOMException, IOException
      {
          JDOMExpressionFactory eval = new JDOMExpressionFactory();
          registerCLHEPConstants( eval );
          SAXBuilder builder = new SAXBuilder();
          builder.setFactory( eval );
          Document doc = builder.build( in );
          return doc;
      }
  
      public static void registerCLHEPConstants( JDOMExpressionFactory f )
      {
          Constants units = Constants.getInstance();
          for ( Entry< String, Double > unit : units.entrySet() )
          {
              f.addConstant( unit.getKey(), unit.getValue() );
          }
      }
  }