Program: 125021
Project: 125021
Buggy source:
public static List<MetadataColumn> guessSchemaFromArray(final CsvArray csvArray,boolean isFirstLineCaption,String header){
  List<MetadataColumn> columns=new ArrayList<MetadataColumn>();
  List<String> exisColumnNames=new ArrayList<String>();
  int headerValue=0;
  if (StringUtils.isNotBlank(header)) {
    headerValue=Integer.parseInt(header);
  }
  if (csvArray == null) {
    return columns;
  }
 else {
    List<String[]> csvRows=csvArray.getRows();
    if (csvRows.isEmpty()) {
      return columns;
    }
    String[] fields=csvRows.get(0);
    int numberOfCol=getNumbersOfColumns(csvRows);
    int firstRowToExtractMetadata=headerValue;
    String[] label=new String[numberOfCol];
    for (int i=0; i < numberOfCol; i++) {
      label[i]=DEFAULT_COLUMN_LABEL + i;
      if (isFirstLineCaption) {
        if (numberOfCol <= fields.length) {
          if (fields[i] != null && !("String_Node_Str").equals(fields[i])) {
            label[i]=fields[i].trim().replaceAll("String_Node_Str","String_Node_Str");
            label[i]=MetadataToolHelper.validateColumnName(label[i],i);
          }
 else {
            label[i]=DEFAULT_COLUMN_LABEL + i;
          }
        }
 else {
          if (i < fields.length) {
            if (fields[i] != null && !("String_Node_Str").equals(fields[i])) {
              label[i]=fields[i].trim().replaceAll("String_Node_Str","String_Node_Str");
            }
 else {
              label[i]=DEFAULT_COLUMN_LABEL + "String_Node_Str" + i;
            }
          }
 else {
            label[i]=DEFAULT_COLUMN_LABEL + "String_Node_Str" + i;
          }
        }
      }
    }
    ShadowProcessPreview.fixDuplicateNames(label);
    for (int i=0; i < numberOfCol; i++) {
      String globalType=null;
      int lengthValue=0;
      int precisionValue=0;
      int current=firstRowToExtractMetadata;
      while (globalType == null) {
        if (current == csvRows.size()) {
          globalType="String_Node_Str";
          continue;
        }
 else         if (i >= csvRows.get(current).length) {
          globalType="String_Node_Str";
        }
 else {
          globalType=JavaDataTypeHelper.getTalendTypeOfValue(csvRows.get(current)[i]);
          current++;
        }
      }
      for (int f=firstRowToExtractMetadata; f < csvRows.size(); f++) {
        fields=csvRows.get(f);
        if (fields.length > i) {
          String value=fields[i];
          if (!value.equals("String_Node_Str")) {
            if (!JavaDataTypeHelper.getTalendTypeOfValue(value).equals(globalType)) {
              globalType=JavaDataTypeHelper.getCommonType(globalType,JavaDataTypeHelper.getTalendTypeOfValue(value));
            }
            if (lengthValue < value.length()) {
              lengthValue=value.length();
            }
            int positionDecimal=0;
            if (value.indexOf(',') > -1) {
              positionDecimal=value.lastIndexOf(',');
              precisionValue=lengthValue - positionDecimal;
            }
 else             if (value.indexOf('.') > -1) {
              positionDecimal=value.lastIndexOf('.');
              precisionValue=lengthValue - positionDecimal;
            }
          }
 else {
            ICoreService coreService=CoreRuntimePlugin.getInstance().getCoreService();
            IPreferenceStore preferenceStore=coreService.getPreferenceStore();
            if (preferenceStore != null) {
              if (preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_TYPE) != null && !preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_TYPE).equals("String_Node_Str")) {
                globalType=preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_TYPE);
                if (preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_LENGTH) != null && !preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_LENGTH).equals("String_Node_Str")) {
                  lengthValue=Integer.parseInt(preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_LENGTH));
                }
              }
            }
          }
        }
      }
      if (csvRows.size() <= 1 && firstRowToExtractMetadata == 1) {
        lengthValue=255;
      }
      MetadataColumn metadataColumn=ConnectionFactory.eINSTANCE.createMetadataColumn();
      metadataColumn.setPattern("String_Node_Str");
      String talendType=globalType;
      if (globalType.equals(JavaTypesManager.FLOAT.getId()) || globalType.equals(JavaTypesManager.DOUBLE.getId())) {
        metadataColumn.setPrecision(precisionValue);
      }
 else {
        metadataColumn.setPrecision(0);
      }
      metadataColumn.setTalendType(talendType);
      metadataColumn.setLength(lengthValue);
      String columnLabel=IndiceHelper.getIndexedLabel(label[i],exisColumnNames);
      metadataColumn.setLabel(columnLabel);
      if (!exisColumnNames.contains(columnLabel)) {
        exisColumnNames.add(columnLabel);
      }
      columns.add(i,metadataColumn);
    }
  }
  return columns;
}

Fixed version (ground truth):
public static List<MetadataColumn> guessSchemaFromArray(final CsvArray csvArray,boolean isFirstLineCaption,String header){
  List<MetadataColumn> columns=new ArrayList<MetadataColumn>();
  List<String> exisColumnNames=new ArrayList<String>();
  int headerValue=0;
  if (StringUtils.isNotBlank(header)) {
    headerValue=Integer.parseInt(header);
  }
  if (csvArray == null) {
    return columns;
  }
 else {
    List<String[]> csvRows=csvArray.getRows();
    if (csvRows.isEmpty()) {
      return columns;
    }
    String[] fields=csvRows.get(0);
    int numberOfCol=getNumbersOfColumns(csvRows);
    int firstRowToExtractMetadata=headerValue;
    String[] label=new String[numberOfCol];
    for (int i=0; i < numberOfCol; i++) {
      label[i]=DEFAULT_COLUMN_LABEL + i;
      if (isFirstLineCaption) {
        if (numberOfCol <= fields.length) {
          if (fields[i] != null && !("String_Node_Str").equals(fields[i])) {
            label[i]=fields[i].trim().replaceAll("String_Node_Str","String_Node_Str");
            label[i]=MetadataToolHelper.validateColumnName(label[i],i);
          }
 else {
            label[i]=DEFAULT_COLUMN_LABEL + i;
          }
        }
 else {
          if (i < fields.length) {
            if (fields[i] != null && !("String_Node_Str").equals(fields[i])) {
              label[i]=fields[i].trim().replaceAll("String_Node_Str","String_Node_Str");
            }
 else {
              label[i]=DEFAULT_COLUMN_LABEL + "String_Node_Str" + i;
            }
          }
 else {
            label[i]=DEFAULT_COLUMN_LABEL + "String_Node_Str" + i;
          }
        }
      }
    }
    ShadowProcessPreview.fixDuplicateNames(label);
    for (int i=0; i < numberOfCol; i++) {
      String globalType=null;
      int lengthValue=0;
      int precisionValue=0;
      int current=firstRowToExtractMetadata;
      while (globalType == null) {
        if (current == csvRows.size()) {
          globalType="String_Node_Str";
          continue;
        }
 else         if (i >= csvRows.get(current).length) {
          globalType="String_Node_Str";
        }
 else {
          globalType=JavaDataTypeHelper.getTalendTypeOfValue(csvRows.get(current)[i]);
          current++;
        }
      }
      for (int f=firstRowToExtractMetadata; f < csvRows.size(); f++) {
        fields=csvRows.get(f);
        if (fields.length > i) {
          String value=fields[i];
          if (!value.equals("String_Node_Str")) {
            if (!JavaDataTypeHelper.getTalendTypeOfValue(value).equals(globalType)) {
              globalType=JavaDataTypeHelper.getCommonType(globalType,JavaDataTypeHelper.getTalendTypeOfValue(value));
            }
            if (lengthValue < value.length()) {
              lengthValue=value.length();
            }
            int positionDecimal=0;
            if (value.indexOf(',') > -1) {
              positionDecimal=value.lastIndexOf(',');
              precisionValue=lengthValue - positionDecimal;
            }
 else             if (value.indexOf('.') > -1) {
              positionDecimal=value.lastIndexOf('.');
              precisionValue=lengthValue - positionDecimal;
            }
          }
 else {
            IPreferenceStore preferenceStore=null;
            if (GlobalServiceRegister.getDefault().isServiceRegistered(IDesignerCoreUIService.class)) {
              IDesignerCoreUIService designerCoreUiService=(IDesignerCoreUIService)GlobalServiceRegister.getDefault().getService(IDesignerCoreUIService.class);
              preferenceStore=designerCoreUiService.getPreferenceStore();
            }
            if (preferenceStore != null && preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_TYPE) != null && !preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_TYPE).equals("String_Node_Str")) {
              globalType=preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_TYPE);
              if (preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_LENGTH) != null && !preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_LENGTH).equals("String_Node_Str")) {
                lengthValue=Integer.parseInt(preferenceStore.getString(MetadataTypeLengthConstants.VALUE_DEFAULT_LENGTH));
              }
            }
          }
        }
      }
      if (csvRows.size() <= 1 && firstRowToExtractMetadata == 1) {
        lengthValue=255;
      }
      MetadataColumn metadataColumn=ConnectionFactory.eINSTANCE.createMetadataColumn();
      metadataColumn.setPattern("String_Node_Str");
      String talendType=globalType;
      if (globalType.equals(JavaTypesManager.FLOAT.getId()) || globalType.equals(JavaTypesManager.DOUBLE.getId())) {
        metadataColumn.setPrecision(precisionValue);
      }
 else {
        metadataColumn.setPrecision(0);
      }
      metadataColumn.setTalendType(talendType);
      metadataColumn.setLength(lengthValue);
      String columnLabel=IndiceHelper.getIndexedLabel(label[i],exisColumnNames);
      metadataColumn.setLabel(columnLabel);
      if (!exisColumnNames.contains(columnLabel)) {
        exisColumnNames.add(columnLabel);
      }
      columns.add(i,metadataColumn);
    }
  }
  return columns;
}