org.rapla.components.util
Class Tools

java.lang.Object
  org.rapla.components.util.Tools

public abstract class Tools
extends Object

miscellaneous util methods.

Field Summary

static Object[]	EMPTY_ARRAY same as new Object[0].
static Class[]	EMPTY_CLASS_ARRAY
static Iterator	EMPTY_ITERATOR
static List	EMPTY_LIST an unmodifiable list with no elements.
static Set	EMPTY_SET an unmodifiable set with no elements.
static String[]	EMPTY_STRING_ARRAY

Constructor Summary

Tools()

Method Summary

static String	convert(byte[] bytes) Convert a byte array into a printable format containing aString of hexadecimal digit characters (two per byte).
static char	convertDigit(int value) Convert the specified value (0-15) to the corresponding hexadecimal digit.
static String[][]	csvRead(Reader reader, int expectedColumns) reads a table from a csv file.
static boolean	equalsOrBothNull(Object o1, Object o2)
static boolean	isKey(String key) Rudimentary tests if the string is a valid xml-tag.
static String	left(String string, int width) same as substring(0,width-1) except that it will not not throw an ArrayIndexOutOfBoundsException if string.length()<width.
static boolean	match(char[] p1, char[] p2) test if 2 char arrays match.
static String	replaceAll(String string, String stringToReplace, String newString) 1.3 compatibility method
static String[]	split(String stringToSplit, char delimiter) 1.3 compatibility method

Methods inherited from class java.lang.Object

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

Field Detail

EMPTY_ARRAY

public static Object[] EMPTY_ARRAY

same as new Object[0].

EMPTY_CLASS_ARRAY

public static Class[] EMPTY_CLASS_ARRAY

EMPTY_STRING_ARRAY

public static String[] EMPTY_STRING_ARRAY

EMPTY_ITERATOR

public static Iterator EMPTY_ITERATOR

EMPTY_LIST

public static List EMPTY_LIST

an unmodifiable list with no elements.

EMPTY_SET

public static Set EMPTY_SET

an unmodifiable set with no elements.

Constructor Detail

Tools

public Tools()

Method Detail

match

public static boolean match(char[] p1,
                            char[] p2)

test if 2 char arrays match.

isKey

public static boolean isKey(String key)

Rudimentary tests if the string is a valid xml-tag.

left

public static String left(String string,
                          int width)

same as substring(0,width-1) except that it will not not throw an ArrayIndexOutOfBoundsException if string.length()<width.

convert

public static String convert(byte[] bytes)

Convert a byte array into a printable format containing aString of hexadecimal digit characters (two per byte). This method is taken form the apache jakarata tomcat project.

convertDigit

public static char convertDigit(int value)

Convert the specified value (0-15) to the corresponding hexadecimal digit. This method is taken form the apache jakarata tomcat project.

equalsOrBothNull

public static boolean equalsOrBothNull(Object o1,
                                       Object o2)

split

public static String[] split(String stringToSplit,
                             char delimiter)

1.3 compatibility method

replaceAll

public static String replaceAll(String string,
                                String stringToReplace,
                                String newString)

1.3 compatibility method

csvRead

public static String[][] csvRead(Reader reader,
                                 int expectedColumns)
                          throws IOException

reads a table from a csv file. You can specify a minimum number of columns

Throws:

IOException