org.eclipse.osgi.framework.internal.core

Class Util

java.lang.Object

org.eclipse.osgi.framework.internal.core.Util

public class Util
extends Object

This class contains utility functions.

Constructor Summary

Constructors

Constructor and Description
Util()

Method Summary

Methods

Modifier and Type	Method and Description
static void	dsort(Object[] array, int start, int end) Sorts the specified range in the array in descending order.
static void	qSortByString(Object[] array, int start, int stop) Sorts the array of objects by their string representation in ascending order.
static void	sort(Object[] array, int start, int end) Sorts the specified range in the array in ascending order.
static void	sortByString(Object[] array) Performs a quicksort of the given objects by their string representation in ascending order.
static void	swap(Object[] array) Reverse the elements in the array.
static String	toString(Object object, int length) Returns a string representation of the object in the given length.
static String	toString(Object object, int length, char pad, boolean onLeft) Returns a string representation of the object in the given length.

Methods inherited from class java.lang.Object

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

Constructor Detail

Util

public Util()

Method Detail

sortByString

public static void sortByString(Object[] array)

Performs a quicksort of the given objects by their string representation in ascending order.

Parameters:

array - The array of objects to sort

qSortByString

public static void qSortByString(Object[] array,
                 int start,
                 int stop)

Sorts the array of objects by their string representation in ascending order.

This is a version of C.A.R Hoare's Quick Sort algorithm.

Parameters:

array - the array of objects to sort

start - the start index to begin sorting

stop - the end index to stop sorting

Throws:

ArrayIndexOutOfBoundsException - when start < 0 or end >= array.length

sort

public static void sort(Object[] array,
        int start,
        int end)

Sorts the specified range in the array in ascending order.

Parameters:

array - the Object array to be sorted

start - the start index to sort

end - the last + 1 index to sort

Throws:

ClassCastException - when an element in the array does not implement Comparable or elements cannot be compared to each other

IllegalArgumentException - when start > end

ArrayIndexOutOfBoundsException - when start < 0 or end > array.size()

dsort

public static void dsort(Object[] array,
         int start,
         int end)

Sorts the specified range in the array in descending order.

Parameters:

array - the Object array to be sorted

start - the start index to sort

end - the last + 1 index to sort

Throws:

ClassCastException - when an element in the array does not implement Comparable or elements cannot be compared to each other

IllegalArgumentException - when start > end

ArrayIndexOutOfBoundsException - when start < 0 or end > array.size()

swap

public static void swap(Object[] array)

Reverse the elements in the array.

Parameters:

array - the Object array to be reversed

toString

public static String toString(Object object,
              int length)

Returns a string representation of the object in the given length. If the string representation of the given object is longer then it is truncated. If it is shorter then it is padded with the blanks to the given total length. If the given object is a number then the padding is done on the left, otherwise on the right.

Parameters:

object - the object to convert

length - the length the output string

toString

public static String toString(Object object,
              int length,
              char pad,
              boolean onLeft)

Returns a string representation of the object in the given length. If the string representation of the given object is longer then it is truncated. If it is shorter then it is padded to the left or right with the given character to the given total length.

Parameters:

object - the object to convert

length - the length the output string

pad - the pad character

onLeft - if true pad on the left, otherwise an the right