boone.util

Class Conversion

java.lang.Object

boone.util.Conversion

public class Conversion
extends java.lang.Object

Various methods for conversion of data.

Version:

$Id$

Author:

August Mayer

Constructor Summary

Constructors

Constructor and Description
Conversion()

Method Summary

Modifier and Type	Method and Description
static java.util.List<java.lang.Double>	asList(double[] array) Copies the content of the specified array into a new list.
static java.lang.String	constructDoubleList(double[] numbers) convert an array of doubles to a String list
static java.lang.String	constructDoubleList(java.util.List<java.lang.Double> numbers) convert a list of doubles to a String list
static void	copyTo(double[] original, java.util.List<java.lang.Double> copy) Copies the content of the specified double array into a Double list.
static void	dump(byte[] b) Dump a byte array in a nice format, to System.out.
static void	dump(byte[] b, int offs, int len) Dump a byte array in a nice format, to System.out.
static java.lang.String	escapeNewlines(java.lang.String string) Escape newlines in the given String.
static java.util.List<java.lang.Double>	parseDouble(java.lang.String text) Extracts a list of Doubles from a comma-separated string of doubles.
static double[]	parseDoubleList(java.lang.String text) extract a double array from a string list of doubles.
static double[]	toArray(java.util.List<java.lang.Double> list) Copies the list values to a new array with the size of the list.
static boolean	toBoolean(java.lang.String str, boolean defaultValue) Converts a string boolean to a boolean.
static double	toDouble(java.lang.String str, double defaultValue) Convert a stringified double to a double.
static float	toFloat(java.lang.String str, float defaultValue) Converts a string float to a float.
static int	toInt(java.lang.String str, int defaultValue) Converts a string int to an int.
static long	toLong(java.lang.String str, long defaultValue) Converts a string long to a long.
static java.lang.String	unescapeNewlines(java.lang.String string) Unescape Newlines in the given string.

Methods inherited from class java.lang.Object

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

Constructor Detail

Conversion

public Conversion()

Method Detail

parseDoubleList

public static double[] parseDoubleList(java.lang.String text)

extract a double array from a string list of doubles.

parseDouble

public static java.util.List<java.lang.Double> parseDouble(java.lang.String text)

Extracts a list of Doubles from a comma-separated string of doubles.

Parameters:

text - the String with comma-separated double values

Returns:

a list of double values, the list is empty, if no values found, null, if text is null

constructDoubleList

public static java.lang.String constructDoubleList(double[] numbers)

convert an array of doubles to a String list

constructDoubleList

public static java.lang.String constructDoubleList(java.util.List<java.lang.Double> numbers)

convert a list of doubles to a String list

toBoolean

public static boolean toBoolean(java.lang.String str,
                                boolean defaultValue)

Converts a string boolean to a boolean. This accepts the following values (case-insensitive, space-trimmed):

      true, 1, on, yes ... true
      false, 0, off, no ... false
 

If neither of those values is recognized, then the given default value is returned.

toDouble

public static double toDouble(java.lang.String str,
                              double defaultValue)

Convert a stringified double to a double. This catches the NumberFormatException of Double.parseDouble(java.lang.String), and returns a default value instead.

toFloat

public static float toFloat(java.lang.String str,
                            float defaultValue)

Converts a string float to a float. This catches the NumberFormatException of Float.parseFloat(java.lang.String), and returns a default value instead.

toInt

public static int toInt(java.lang.String str,
                        int defaultValue)

Converts a string int to an int. This catches the NumberFormatException of Integer.parseInt(java.lang.String, int), and returns a default value instead.

toLong

public static long toLong(java.lang.String str,
                          long defaultValue)

Converts a string long to a long. This catches the NumberFormatException of Long.parseLong(java.lang.String, int), and returns a default value instead.

escapeNewlines

public static java.lang.String escapeNewlines(java.lang.String string)

Escape newlines in the given String. Specifically, escapes NL to \n, CR to \r and \ to \\ .

Parameters:

string - The String to escape.

Returns:

An escaped version of the string.

unescapeNewlines

public static java.lang.String unescapeNewlines(java.lang.String string)

Unescape Newlines in the given string. Specifically, unescapes NL from "\n", CR from "\r" and \ from "\\" .

Parameters:

string - The String to unescape.

Returns:

A version of the string, with the escapes removed.

dump

public static void dump(byte[] b)

Dump a byte array in a nice format, to System.out.

Parameters:

b - Byte array to be dumped.

dump

public static void dump(byte[] b,
                        int offs,
                        int len)

Dump a byte array in a nice format, to System.out.

Parameters:

b - Byte array to be dumped.

offs - Offset where to start dumping.

len - Length of the area to be dumped.

copyTo

public static void copyTo(double[] original,
                          java.util.List<java.lang.Double> copy)

Copies the content of the specified double array into a Double list.

Parameters:

original - the array to be copied

copy - the list to be copied into

asList

public static java.util.List<java.lang.Double> asList(double[] array)

Copies the content of the specified array into a new list.

Parameters:

array - the array to be copied

Returns:

copy of the array as a list

toArray

public static double[] toArray(java.util.List<java.lang.Double> list)

Copies the list values to a new array with the size of the list.

Parameters:

list - a list with Doubles

Returns:

an array with doubles