org.apache.commons.io

Class IOCase

java.lang.Object

org.apache.commons.io.IOCase

All Implemented Interfaces:

java.io.Serializable

public final class IOCase
extends java.lang.Object
implements java.io.Serializable

Enumeration of IO case sensitivity.

Different filing systems have different rules for case-sensitivity. Windows is case-insensitive, Unix is case-sensitive.

This class captures that difference, providing an enumeration to control how filename comparisons should be performed. It also provides methods that use the enumeration to perform comparisons.

Wherever possible, you should use the check methods in this class to compare filenames.

Since:

1.3

Version:

$Id: IOCase.java 1307459 2012-03-30 15:11:44Z ggregory $

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static IOCase	INSENSITIVE The constant for case insensitive regardless of operating system.
private java.lang.String	name The enumeration name.
private boolean	sensitive The sensitivity flag.
static IOCase	SENSITIVE The constant for case sensitive regardless of operating system.
private static long	serialVersionUID Serialization version.
static IOCase	SYSTEM The constant for case sensitivity determined by the current operating system.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	IOCase(java.lang.String name, boolean sensitive) Private constructor.

Method Summary

Methods

Modifier and Type	Method and Description
int	checkCompareTo(java.lang.String str1, java.lang.String str2) Compares two strings using the case-sensitivity rule.
boolean	checkEndsWith(java.lang.String str, java.lang.String end) Checks if one string ends with another using the case-sensitivity rule.
boolean	checkEquals(java.lang.String str1, java.lang.String str2) Compares two strings using the case-sensitivity rule.
int	checkIndexOf(java.lang.String str, int strStartIndex, java.lang.String search) Checks if one string contains another starting at a specific index using the case-sensitivity rule.
boolean	checkRegionMatches(java.lang.String str, int strStartIndex, java.lang.String search) Checks if one string contains another at a specific index using the case-sensitivity rule.
boolean	checkStartsWith(java.lang.String str, java.lang.String start) Checks if one string starts with another using the case-sensitivity rule.
static IOCase	forName(java.lang.String name) Factory method to create an IOCase from a name.
java.lang.String	getName() Gets the name of the constant.
boolean	isCaseSensitive() Does the object represent case sensitive comparison.
private java.lang.Object	readResolve() Replaces the enumeration from the stream with a real one.
java.lang.String	toString() Gets a string describing the sensitivity.

Methods inherited from class java.lang.Object

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

Field Detail

SENSITIVE

public static final IOCase SENSITIVE

The constant for case sensitive regardless of operating system.

INSENSITIVE

public static final IOCase INSENSITIVE

The constant for case insensitive regardless of operating system.

SYSTEM

public static final IOCase SYSTEM

The constant for case sensitivity determined by the current operating system. Windows is case-insensitive when comparing filenames, Unix is case-sensitive.

Note: This only caters for Windows and Unix. Other operating systems (e.g. OSX and OpenVMS) are treated as case sensitive if they use the Unix file separator and case-insensitive if they use the Windows file separator (see File.separatorChar).

If you derialize this constant of Windows, and deserialize on Unix, or vice versa, then the value of the case-sensitivity flag will change.

serialVersionUID

private static final long serialVersionUID

Serialization version.

See Also:

Constant Field Values

name

private final java.lang.String name

The enumeration name.

sensitive

private final transient boolean sensitive

The sensitivity flag.

Constructor Detail

IOCase

private IOCase(java.lang.String name,
      boolean sensitive)

Private constructor.

Parameters:

name - the name

sensitive - the sensitivity

Method Detail

forName

public static IOCase forName(java.lang.String name)

Factory method to create an IOCase from a name.

Parameters:

name - the name to find

Returns:

the IOCase object

Throws:

java.lang.IllegalArgumentException - if the name is invalid

readResolve

private java.lang.Object readResolve()

Replaces the enumeration from the stream with a real one. This ensures that the correct flag is set for SYSTEM.

Returns:

the resolved object

getName

public java.lang.String getName()

Gets the name of the constant.

Returns:

the name of the constant

isCaseSensitive

public boolean isCaseSensitive()

Does the object represent case sensitive comparison.

Returns:

true if case sensitive

checkCompareTo

public int checkCompareTo(java.lang.String str1,
                 java.lang.String str2)

Compares two strings using the case-sensitivity rule.

This method mimics String.compareTo(java.lang.String) but takes case-sensitivity into account.

Parameters:

str1 - the first string to compare, not null

str2 - the second string to compare, not null

Returns:

true if equal using the case rules

Throws:

java.lang.NullPointerException - if either string is null

checkEquals

public boolean checkEquals(java.lang.String str1,
                  java.lang.String str2)

Compares two strings using the case-sensitivity rule.

This method mimics String.equals(java.lang.Object) but takes case-sensitivity into account.

Parameters:

str1 - the first string to compare, not null

str2 - the second string to compare, not null

Returns:

true if equal using the case rules

Throws:

java.lang.NullPointerException - if either string is null

checkStartsWith

public boolean checkStartsWith(java.lang.String str,
                      java.lang.String start)

Checks if one string starts with another using the case-sensitivity rule.

This method mimics String.startsWith(String) but takes case-sensitivity into account.

Parameters:

str - the string to check, not null

start - the start to compare against, not null

Returns:

true if equal using the case rules

Throws:

java.lang.NullPointerException - if either string is null

checkEndsWith

public boolean checkEndsWith(java.lang.String str,
                    java.lang.String end)

Checks if one string ends with another using the case-sensitivity rule.

This method mimics String.endsWith(java.lang.String) but takes case-sensitivity into account.

Parameters:

str - the string to check, not null

end - the end to compare against, not null

Returns:

true if equal using the case rules

Throws:

java.lang.NullPointerException - if either string is null

checkIndexOf

public int checkIndexOf(java.lang.String str,
               int strStartIndex,
               java.lang.String search)

Checks if one string contains another starting at a specific index using the case-sensitivity rule.

This method mimics parts of String.indexOf(String, int) but takes case-sensitivity into account.

Parameters:

str - the string to check, not null

strStartIndex - the index to start at in str

search - the start to search for, not null

Returns:

the first index of the search String, -1 if no match or null string input

Throws:

java.lang.NullPointerException - if either string is null

Since:

2.0

checkRegionMatches

public boolean checkRegionMatches(java.lang.String str,
                         int strStartIndex,
                         java.lang.String search)

Checks if one string contains another at a specific index using the case-sensitivity rule.

This method mimics parts of String.regionMatches(boolean, int, String, int, int) but takes case-sensitivity into account.

Parameters:

str - the string to check, not null

strStartIndex - the index to start at in str

search - the start to search for, not null

Returns:

true if equal using the case rules

Throws:

java.lang.NullPointerException - if either string is null

toString

public java.lang.String toString()

Gets a string describing the sensitivity.

Overrides:

toString in class java.lang.Object

Returns:

a string describing the sensitivity