Module org.eclipse.persistence.core

Package org.eclipse.persistence.internal.helper

Class StringHelper

java.lang.Object

org.eclipse.persistence.internal.helper.StringHelper

public class StringHelper
extends Object

INTERNAL:

Purpose: Define any useful String constants and methods that are missing from the base Java.

Field Summary

Fields

Modifier and Type	Field	Description
static final char	CR	Carriage return
static final char	DOT	Dot.
static final String	EMPTY_STRING	Empty String.
static final char	FF	Form feed
static final char	LEFT_BRACE	Left brace.
static final char	LEFT_BRACKET	Left bracket.
static final char	LF	Line feed.
static final String	NULL_STRING	"null" String.
static final char	QUESTION_MARK	Vertical bar.
static final char	RIGHT_BRACE	Right brace.
static final char	RIGHT_BRACKET	Right bracket.
static final char	SPACE	Space.
static final char	TAB	Horizontal tab.
static final char	VERTICAL_BAR	Vertical bar.

Constructor Summary

Constructors

Constructor	Description
StringHelper()

Method Summary

Modifier and Type	Method	Description
static final boolean	isBlank(String str)	Checks if String is null, is empty ("") or contains white spaces only.
static final String	nonNullString(String str)	Never return null but replace it with "null" String.

Methods inherited from class java.lang.Object

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

Field Details

TAB

public static final char TAB

Horizontal tab.

See Also:

• Constant Field Values

LF

public static final char LF

Line feed.

See Also:

• Constant Field Values

FF

public static final char FF

Form feed

See Also:

• Constant Field Values

CR

public static final char CR

Carriage return

See Also:

• Constant Field Values

SPACE

public static final char SPACE

Space.

See Also:

• Constant Field Values

LEFT_BRACE

public static final char LEFT_BRACE

Left brace.

See Also:

• Constant Field Values

RIGHT_BRACE

public static final char RIGHT_BRACE

Right brace.

See Also:

• Constant Field Values

LEFT_BRACKET

public static final char LEFT_BRACKET

Left bracket.

See Also:

• Constant Field Values

RIGHT_BRACKET

public static final char RIGHT_BRACKET

Right bracket.

See Also:

• Constant Field Values

DOT

public static final char DOT

Dot.

See Also:

• Constant Field Values

VERTICAL_BAR

public static final char VERTICAL_BAR

Vertical bar.

See Also:

• Constant Field Values

QUESTION_MARK

public static final char QUESTION_MARK

Vertical bar.

See Also:

• Constant Field Values

EMPTY_STRING

public static final String EMPTY_STRING

Empty String.

See Also:

• Constant Field Values

NULL_STRING

public static final String NULL_STRING

"null" String.

See Also:

• Constant Field Values

Constructor Details

StringHelper

public StringHelper()

Method Details

nonNullString

public static final String nonNullString(String str)

Never return null but replace it with "null" String.

Parameters:

str - String to be checked for null and eventually replaced with "null" String.

Returns:

Provided string when not null or "null" String.

isBlank

public static final boolean isBlank(String str)

Checks if String is null, is empty ("") or contains white spaces only.

Parameters:

str - String to be checked.

Returns:

Value of true if @link String} is null, is empty ("") or contains white spaces only or false otherwise