org.apache.maven.surefire.util.internal

Class StringUtils

java.lang.Object

org.apache.maven.surefire.util.internal.StringUtils

public final class StringUtils
extends Object

Common java.lang.String manipulation routines.

Originally from Turbine and the GenerationJavaCore library.

NOTE: This class is not part of any api and is public purely for technical reasons !

Since:

1.0

Version:

$Id: StringUtils.java 8001 2009-01-03 13:17:09Z vsiveton $

Author:

Jon S. Stevens, Daniel Rall, Greg Coladonato, Henri Yandell, Ed Korthof, Rand McNeely, Stephen Colebourne, Fredrik Westermarck, Holger Krauth, Alexander Day Chaffee, Vincent Siveton

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	StringUtils.EncodedArray Escaped string to byte array with offset 0 and certain length.

Field Summary

Fields

Modifier and Type	Field and Description
static Charset	ISO_8859_1
static String	NL
static Charset	US_ASCII TODO Use JDK7 StandardCharsets
static Charset	UTF_8

Method Summary

Modifier and Type	Method and Description
static byte[]	encodeStringForForkCommunication(String string)
static StringUtils.EncodedArray	escapeBytesToPrintable(byte[] header, byte[] input, int off, int len) Escapes the bytes in the array input to contain only 'printable' bytes.
static void	escapeToPrintable(StringBuilder target, CharSequence str) Escape the specified string to a representation that only consists of nicely printable characters, without any newlines and without a comma.
static boolean	isBlank(String str) Checks if a (trimmed) String is null or blank.
static boolean	isNotBlank(String str) Checks if a (trimmed) String is not null and not blank.
static String[]	split(String text, String separator)
static boolean	startsWith(StringBuffer buffer, String pattern) Determines if buffer starts with specific literal(s).
static ByteBuffer	unescapeBytes(String str, String charsetName) Reverses the effect of escapeBytesToPrintable(byte[], byte[], int, int).
static void	unescapeString(StringBuilder target, CharSequence str) Reverses the effect of escapeToPrintable(StringBuilder, CharSequence).

Methods inherited from class java.lang.Object

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

Field Detail

NL

public static final String NL

US_ASCII

public static final Charset US_ASCII

TODO Use JDK7 StandardCharsets

ISO_8859_1

public static final Charset ISO_8859_1

UTF_8

public static final Charset UTF_8

Method Detail

split

public static String[] split(String text,
                             String separator)

isBlank

public static boolean isBlank(String str)

Checks if a (trimmed) String is null or blank.

Parameters:

str - the String to check

Returns:

true if the String is null, or length zero once trimmed

isNotBlank

public static boolean isNotBlank(String str)

Checks if a (trimmed) String is not null and not blank.

Parameters:

str - the String to check

Returns:

true if the String is not null and length of trimmed str is not zero.

escapeToPrintable

public static void escapeToPrintable(StringBuilder target,
                                     CharSequence str)

Escape the specified string to a representation that only consists of nicely printable characters, without any newlines and without a comma.

The reverse-method is unescapeString(StringBuilder, CharSequence).

Parameters:

target - target string buffer. The required space will be up to str.getBytes().length * 5 chars.

str - String to escape values in, may be null.

unescapeString

public static void unescapeString(StringBuilder target,
                                  CharSequence str)

Reverses the effect of escapeToPrintable(StringBuilder, CharSequence).

Parameters:

target - target string buffer

str - the String to un-escape, as created by escapeToPrintable(StringBuilder, CharSequence)

escapeBytesToPrintable

public static StringUtils.EncodedArray escapeBytesToPrintable(byte[] header,
                                                              byte[] input,
                                                              int off,
                                                              int len)

Escapes the bytes in the array input to contain only 'printable' bytes.
Escaping is done by encoding the non-nicely printable bytes to '\' + upperCaseHexBytes(byte).
The reverse-method is unescapeBytes(String, String).
The returned byte array is started with aligned sequence header and finished by \n.

Parameters:

header - prefix header

input - input buffer

off - offset in the input buffer

len - number of bytes to copy from the input buffer

Returns:

number of bytes written to out

Throws:

NullPointerException - if the specified parameter header or input is null

IndexOutOfBoundsException - if off or len is out of range (off < 0 || len < 0 || off >= input.length || len > input.length || off > len)

unescapeBytes

public static ByteBuffer unescapeBytes(String str,
                                       String charsetName)

Reverses the effect of escapeBytesToPrintable(byte[], byte[], int, int).

Parameters:

str - the input String

charsetName - the charset name

Returns:

the number of bytes written to out

encodeStringForForkCommunication

public static byte[] encodeStringForForkCommunication(String string)

startsWith

public static boolean startsWith(StringBuffer buffer,
                                 String pattern)

Determines if buffer starts with specific literal(s).

Parameters:

buffer - Examined StringBuffer

pattern - a pattern which should start in buffer

Returns:

true if buffer's literal starts with given pattern, or both are empty.