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   *  distributed with this work for additional information
   *  regarding copyright ownership.  The ASF licenses this file
   *  to you under the Apache License, Version 2.0 (the
   *  "License"); you may not use this file except in compliance
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  package org.apache.cayenne.modeler.util;
  
  import org.apache.cayenne.validation.BeanValidationFailure;
  import org.apache.cayenne.validation.ValidationFailure;
  
  // TODO, andrus 4/13/2006 - merge with BeanValidationFailure.
  public class CodeValidationUtil {
  
      private static String validationMessage(String attribute, String message) {
          StringBuffer buffer = new StringBuffer(message.length() + attribute.length() + 5);
          buffer.append('\"').append(attribute).append("\" ").append(message);
          return buffer.toString();
      }
  
      public static ValidationFailure validateJavaIdentifier(
              Object bean,
              String attribute,
              String identifier) {
  
          ValidationFailure emptyFailure = BeanValidationFailure.validateNotEmpty(
                  bean,
                  attribute,
                  identifier);
          
          if (emptyFailure != null) {
              return emptyFailure;
          }
  
          char c = identifier.charAt(0);
          if (!Character.isJavaIdentifierStart(c)) {
              return new BeanValidationFailure(bean, attribute, validationMessage(
                      attribute,
                      " starts with invalid character: " + c));
          }
  
          for (int i = 1; i < identifier.length(); i++) {
              c = identifier.charAt(i);
              if (!Character.isJavaIdentifierPart(c)) {
                  return new BeanValidationFailure(bean, attribute, validationMessage(
                          attribute,
                          " contains invalid character: " + c));
              }
  
          }
  
          return null;
      }
  }
  