de.cismet.commons.utils

Class StringUtils

java.lang.Object

de.cismet.commons.utils.StringUtils

public final class StringUtils
extends Object

Various helpers for String literals.

Version:

1.1

Author:

schlob, mscholl

Field Summary

Fields

Modifier and Type	Field and Description
static String[]	KEYWORDS All the java keywords + 'true', 'false' 'null' literals

Method Summary

Modifier and Type	Method and Description
static String	deleteWhitespaces(String string) Deletes all white-spaces from the given string.
static boolean	isKeyword(String identifier) Checks a given string if it is a java keyword.
static String	toPackage(String pakkage) This operation turns the given string in a valid java package by eliminating all illegal characters at which the dot character '.' is also considered illegal at the beginning and at the end of the string.

Methods inherited from class java.lang.Object

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

Field Detail

KEYWORDS

public static final String[] KEYWORDS

All the java keywords + 'true', 'false' 'null' literals

Method Detail

deleteWhitespaces

public static String deleteWhitespaces(String string)

Deletes all white-spaces from the given string.

Parameters:

string - the string that whose white-spaces shall be removed

Returns:

a string without white-spaces or null if the given string was null

isKeyword

public static boolean isKeyword(String identifier)

Checks a given string if it is a java keyword. Note that 'true', 'false' and 'null' are also considered keywords although they are really plain literals but with a special meaning. null is not considered a java keyword.

Parameters:

identifier - the string to check if it is a java keyword

Returns:

true if the given string is a java keyword, false otherwise

See Also:

KEYWORDS

toPackage

public static String toPackage(String pakkage)

This operation turns the given string in a valid java package by eliminating all illegal characters at which the dot character '.' is also considered illegal at the beginning and at the end of the string. Additionally it checks if the resulting package identifiers are java keywords and appends a '_' if so. If the given string is null then null is returned. If the given string is empty an empty string is returned.

Examples:

'my.good.pakkage' -> 'my.good.pakkage'
'my.good.package' -> 'my.good.package_'
'my.--.9pakkage' -> 'my.pakkage'
'.3true..pakkages.' -> 'true_.pakkages'
'---' -> ''

Parameters:

pakkage - the string to turn into a valid java package name

Returns:

a valid java package name

See Also:

isKeyword(java.lang.String)