Package com.digicert.validation.utils

Class FilenameUtils

java.lang.Object

com.digicert.validation.utils.FilenameUtils

public class FilenameUtils
extends Object

Utility class for validating filenames.

The `FilenameUtils` class provides static methods for validating filenames. It ensures that filenames contain only allowed characters and do not exceed a maximum length. This class is useful for validating filenames before using them in file operations or storage.

Field Summary

Fields

Modifier and Type	Field	Description
private static final Pattern	FILENAME_CHAR_PATTERN	Regex for one or more of the allowed char set for filename.

Constructor Summary

Constructors

Modifier	Constructor	Description
private	FilenameUtils()	Private constructor to prevent instantiation.

Method Summary

Modifier and Type	Method	Description
static void	validateFilename(String fileName)	Validates a filename to ensure it contains only allowed characters and does not exceed a maximum length.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

FILENAME_CHAR_PATTERN

private static final Pattern FILENAME_CHAR_PATTERN

Regex for one or more of the allowed char set for filename.

Constructor Details

FilenameUtils

private FilenameUtils()

Private constructor to prevent instantiation.

Method Details

validateFilename

public static void validateFilename(String fileName)
                             throws IllegalArgumentException

Validates a filename to ensure it contains only allowed characters and does not exceed a maximum length.

Parameters:

fileName - the filename to validate

Throws:

IllegalArgumentException - if the filename is null, empty, contains invalid characters, or exceeds the maximum length