Bug 211839 String grouping unit type needs to support interval range.
Build ID: I20071101-2000 As Chart has supported, the String grouping unit type can be set interval range, the interval range means that the string group will base on row count distinction. For instance, let's say we have a,b,c,d,e,f,g , and set interval range to 2, the grouping result should be a,c,e,g. Now it is a requirement that DtE support the grouping type.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/i18n/ResourceConstants.java
public static final String WRONG_VERSION="data.engine.wrongVersion";
	public static final String UNSUPPORT_OPERATION_EXCEPTION="data.engine.unsupportOperationException";
	public static final String POSSIBLE_MIXED_DATA_TYPE_IN_COLUMN = "data.engine.possibleMixedDataTypeInColumn";
	public static final String RESULT_CLASS_SAVE_ERROR="data.engine.resultClassSaveError";
	public static final String INVALID_MEMORY_BUFFER_SIZE = "data.engine.invalidMemBufferSize";
	public static final String DOCUMENT_ERROR_CANNOT_LOAD_STREAM = "data.engine.document.error.cannotLoadStream";
	public static final String FAIL_TO_CREATE_TEMP_DIR = "data.engine.failToCreateTempDir";
	
	public final static String COLUMN_NAME_CANNOT_BE_EMPTY_OR_NULL = "odaconsumer.ColumnNameCannotBeEmptyOrNull";
	public final static String COLUMN_POSITION_CANNOT_BE_LESS_THAN_ONE = "odaconsumer.ColumnPositionIsOneBased";
	public final static String COLUMN_ALIAS_CANNOT_BE_EMPTY = "odaconsumer.ColumnAliasCannotBeEmpty";
	public final static String CANNOT_PROCESS_DRIVER_CONFIG = "odaconsumer.CannotProcessDriverConfig";
	public final static String INIT_ENTRY_CANNOT_BE_FOUND = "odaconsumer.OdaInitEntryNotFound";
	public final static String ODA_DRIVER_ON_UNSUPPORTED_PLATFORM = "odaconsumer.OdaDriverOnUnsupportedPlatform";
	public final static String CANNOT_GENERATE_URL = "odaconsumer.CannotGenerateUrls";
	public final static String UNSUPPORTED_NATIVE_TYPE = "odaconsumer.UnsupportedNativeType";
	public final static String UNSUPPORTED_DATA_SET_TYPE = "odaconsumer.UnsupportedDataSetType";
	public final static String CANNOT_DETERMINE_DEFAULT_DATA_SET_TYPE = "odaconsumer.CannotDetermineDefaultDataSetType";
	public final static String INVALID_DATA_SET_TYPE = "odaconsumer.InvalidDataSetType";
	public final static String PARAMETER_NAME_CANNOT_BE_EMPTY_OR_NULL = "odaconsumer.ParameterNameCannotBeEmptyOrNull";
	public final static String PARAMETER_POSITION_CANNOT_BE_LESS_THAN_ONE = "odaconsumer.ParameterPositionIsOneBased";
    public final static String CANNOT_GET_PARAMETER_NAME = "odaconsumer.CannotGetParameterNativeName";
    public final static String CANNOT_GET_PARAMETER_TYPE = "odaconsumer.CannotGetParameterType";
	public final static String CANNOT_GET_PARAMETER_TYPE_NAME = "odaconsumer.CannotGetParameterTypeName";
	public final static String CANNOT_GET_PARAMETER_MODE = "odaconsumer.CannotGetParameterMode";
	public final static String CANNOT_GET_PARAMETER_SCALE = "odaconsumer.CannotGetParameterScale";
	public final static String CANNOT_GET_PARAMETER_PRECISION = "odaconsumer.CannotGetParameterPrecision";
	public final static String CANNOT_GET_PARAMETER_ISNULLABLE = "odaconsumer.CannotGetParameterIsNullable";
	public final static String SAME_PARAM_NAME_FOR_DIFFERENT_HINTS = "odaconsumer.SameParamNameForDifferentHints";
	public final static String DIFFERENT_PARAM_NAME_FOR_SAME_POSITION = "odaconsumer.DifferentParamNameForSamePosition";