// $Id: AbstractTypeDescription.java 165 2009-05-28 21:46:38Z agony $
   /**
    * 
    */
   package de.mindcrimeilab.xsanalyzer.xsext;
   
   import java.security.MessageDigest;
   
   import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  import org.apache.xerces.xs.XSTypeDefinition;
  
  import de.mindcrimeilab.xsanalyzer.XSAnalyzerConstants;
  import de.mindcrimeilab.xsanalyzer.util.XSModelHelper;
  
  /**
   * @author Michael Engelhardt<me@mindcrime-ilab.de>
   * @author $Author: agony $
   * @version $Revision: 165 $
   * 
   */
  public class AbstractTypeDescription {
  
      protected static final Log logger = LogFactory.getLog("xsAnalyzerApplicationLogger");
  
      protected static String getSignatureDigest(String signature, MessageDigest messageDigest) {
  
          byte[] digest = messageDigest.digest(signature.toString().getBytes());
  
          StringBuilder sb = new StringBuilder();
          for (byte b : digest) {
              sb.append(Integer.toHexString(b & 0xff));
          }
  
          return sb.toString();
      }
  
      /**
       * @param signature
       * @param baseType
       */
      protected static void appendBaseType(StringBuilder signature, XSTypeDefinition baseType) {
          signature.append(baseType.getNamespace()).append(":");
          signature.append(baseType.getName()).append(":");
      }
  
      protected static XSTypeDefinition getBaseTypeRecursive(XSTypeDefinition type) {
          // return if the current namespace is the xml schema namespace - no
          // further type definitions needed
          if (XSAnalyzerConstants.XML_SCHEMA_NAMESPACE.equals(type.getNamespace())) {
              return type;
          }
          else {
              XSTypeDefinition base = XSModelHelper.getBaseType(type);
              return (null == base) ? type : AbstractTypeDescription.getBaseTypeRecursive(base);
          }
  
      }
  
      public AbstractTypeDescription() {
          super();
      }
  
  }