Program: 44662
Project: 44662
Buggy source:
public String getXPath(){
  if (StringUtils.isEmpty(property))   return "String_Node_Str";
  StringBuilder criterion=new StringBuilder();
  if (CollectionUtils.isNotEmpty(values) && values.size() > 1)   criterion.append(CmsConstants.LEFT_PARENTHESIS_WITH_LEADING_AND_TRAILING_SPACE);
  criterion.append(CmsConstants.EMPTY_SPACE);
  if (operator == null)   operator=QueryOperator.EQUALS;
  if (QueryOperator.IS_NULL == operator)   criterion.append(XPathUtils.attributeNullCriteria(property));
 else   if (QueryOperator.IS_NOT_NULL == operator)   criterion.append(XPathUtils.attributeNotNullCriteria(property));
 else   if (CollectionUtils.isEmpty(values)) {
    if (operator == QueryOperator.EQUALS)     criterion.append(XPathUtils.attributeNullCriteria(property));
 else     if (operator == QueryOperator.NOT_EQUALS)     criterion.append(XPathUtils.attributeNotNullCriteria(property));
 else     return "String_Node_Str";
  }
 else {
    String propertyPath=property;
    if (QueryOperator.EQUALS == operator || QueryOperator.NOT_EQUALS == operator || QueryOperator.LIKE == operator) {
      if (CaseMatching.LOWER_CASE == caseMatching) {
        propertyPath=CmsConstants.FN_LOWER_CASE + CmsConstants.LEFT_PARENTHESIS + property+ CmsConstants.RIGHT_PARENTHESIS;
      }
 else       if (CaseMatching.UPPER_CASE == caseMatching) {
        propertyPath=CmsConstants.FN_UPPER_CASE + CmsConstants.LEFT_PARENTHESIS + property+ CmsConstants.RIGHT_PARENTHESIS;
      }
    }
    if (internalCondition == null)     internalCondition=Condition.AND;
    performSpecialOperationsInCaseOfContainsOperator();
    for (    Object value : values) {
      if (value instanceof String) {
        value=transformValueIfCaseMatchingIsEnabled(value);
        value=checkIfValueIsAReferenceAndLoadReferenceId((String)value);
        value=checkIfPropertyIsOfTypeLongIntegerOrDoubleAndConvertValueAccordingly(propertyPath,(String)value);
      }
      criterion.append(CmsConstants.EMPTY_SPACE + XPathUtils.createObjectCriteria(propertyPath,operator,value,propertyIsSimple,caseMatching,numberOfNodeLevelsToSearchInTheModelHierarchy) + CmsConstants.EMPTY_SPACE+ internalCondition.toString().toLowerCase());
    }
    criterion.replace(criterion.length() - internalCondition.toString().length(),criterion.length(),"String_Node_Str");
  }
  criterion.append(CmsConstants.EMPTY_SPACE);
  if (CollectionUtils.isNotEmpty(values) && values.size() > 1)   criterion.append(CmsConstants.RIGHT_PARENTHESIS_WITH_LEADING_AND_TRAILING_SPACE);
  return criterion.toString();
}

Fixed version (ground truth):
public String getXPath(){
  if (StringUtils.isEmpty(property))   return "String_Node_Str";
  StringBuilder criterion=new StringBuilder();
  if (CollectionUtils.isNotEmpty(values) && values.size() > 1)   criterion.append(CmsConstants.LEFT_PARENTHESIS_WITH_LEADING_AND_TRAILING_SPACE);
  criterion.append(CmsConstants.EMPTY_SPACE);
  if (operator == null)   operator=QueryOperator.EQUALS;
  if (QueryOperator.IS_NULL == operator) {
    checkThatPropertyPathRefersToSimpleProperty();
    criterion.append(XPathUtils.createNullCriterion(property,propertyIsSimple));
  }
 else   if (QueryOperator.IS_NOT_NULL == operator) {
    checkThatPropertyPathRefersToSimpleProperty();
    criterion.append(XPathUtils.createNotNullCriterion(property,propertyIsSimple));
  }
 else   if (CollectionUtils.isEmpty(values)) {
    checkThatPropertyPathRefersToSimpleProperty();
    if (operator == QueryOperator.EQUALS)     criterion.append(XPathUtils.createNullCriterion(property,propertyIsSimple));
 else     if (operator == QueryOperator.NOT_EQUALS)     criterion.append(XPathUtils.createNotNullCriterion(property,propertyIsSimple));
 else     return "String_Node_Str";
  }
 else {
    String propertyPath=property;
    if (QueryOperator.EQUALS == operator || QueryOperator.NOT_EQUALS == operator || QueryOperator.LIKE == operator) {
      if (CaseMatching.LOWER_CASE == caseMatching) {
        propertyPath=CmsConstants.FN_LOWER_CASE + CmsConstants.LEFT_PARENTHESIS + property+ CmsConstants.RIGHT_PARENTHESIS;
      }
 else       if (CaseMatching.UPPER_CASE == caseMatching) {
        propertyPath=CmsConstants.FN_UPPER_CASE + CmsConstants.LEFT_PARENTHESIS + property+ CmsConstants.RIGHT_PARENTHESIS;
      }
    }
    if (internalCondition == null)     internalCondition=Condition.AND;
    performSpecialOperationsInCaseOfContainsOperator();
    for (    Object value : values) {
      if (value instanceof String) {
        value=transformValueIfCaseMatchingIsEnabled(value);
        value=checkIfValueIsAReferenceAndLoadReferenceId((String)value);
        value=checkIfPropertyIsOfTypeLongIntegerOrDoubleAndConvertValueAccordingly(propertyPath,(String)value);
      }
      criterion.append(CmsConstants.EMPTY_SPACE + XPathUtils.createObjectCriteria(propertyPath,operator,value,propertyIsSimple,caseMatching,numberOfNodeLevelsToSearchInTheModelHierarchy) + CmsConstants.EMPTY_SPACE+ internalCondition.toString().toLowerCase());
    }
    criterion.replace(criterion.length() - internalCondition.toString().length(),criterion.length(),"String_Node_Str");
  }
  criterion.append(CmsConstants.EMPTY_SPACE);
  if (CollectionUtils.isNotEmpty(values) && values.size() > 1)   criterion.append(CmsConstants.RIGHT_PARENTHESIS_WITH_LEADING_AND_TRAILING_SPACE);
  return criterion.toString();
}