org.apache.wiki.pages

Class PageSorter

java.lang.Object

org.apache.wiki.pages.PageSorter

All Implemented Interfaces:

Comparator<String>

public class PageSorter
extends Object
implements Comparator<String>

Wrapper class for managing and using the PageNameComparator.

Note - this class is deliberately not null safe. Never call any of the methods with a null argument!

Field Summary

Fields

Modifier and Type	Field and Description
protected static String	PROP_PAGE_NAME_COMPARATOR

Constructor Summary

Constructors

Constructor and Description
PageSorter() Default constructor uses Java "natural" ordering.
PageSorter(Comparator<String> comparator) Construct with a particular comparator.

Method Summary

Modifier and Type	Method and Description
int	compare(String pageName1, String pageName2) Compare two page names (String version).
boolean	equals(Object o)
void	initialize(Properties props) Called by WikiEngine to initialise this instance.
void	sort(List<String> nameList) Sorts the specified list into ascending order based on the PageNameComparator.
void	sort(String[] nameArray) Sorts the specified array into ascending order based on the PageNameComparator.

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

comparing, comparing, comparingDouble, comparingInt, comparingLong, naturalOrder, nullsFirst, nullsLast, reversed, reverseOrder, thenComparing, thenComparing, thenComparing, thenComparingDouble, thenComparingInt, thenComparingLong

Field Detail

PROP_PAGE_NAME_COMPARATOR

protected static final String PROP_PAGE_NAME_COMPARATOR

See Also:

Constant Field Values

Constructor Detail

PageSorter

public PageSorter()

Default constructor uses Java "natural" ordering.

PageSorter

public PageSorter(Comparator<String> comparator)

Construct with a particular comparator.

Parameters:

comparator - the Comparator to use

Method Detail

compare

public int compare(String pageName1,
                   String pageName2)

Compare two page names (String version).

Specified by:

compare in interface Comparator<String>

Parameters:

pageName1 - the first page name

pageName2 - the second page name

Returns:

see java.util.Comparator

See Also:

Comparator.compare(java.lang.Object, java.lang.Object)

equals

public boolean equals(Object o)

Specified by:

equals in interface Comparator<String>

Overrides:

equals in class Object

initialize

public void initialize(Properties props)

Called by WikiEngine to initialise this instance. Tries to use class given by the PROP_PAGE_NAME_COMPARATOR property as the page name comparator. Uses a default comparator if this property is not set or there is any problem loading the specified class.

Parameters:

props - this WikiEngine's properties.

sort

public void sort(List<String> nameList)

Sorts the specified list into ascending order based on the PageNameComparator. The actual sort is done using Collections.sort().

Parameters:

nameList - the page names to be sorted

sort

public void sort(String[] nameArray)

Sorts the specified array into ascending order based on the PageNameComparator. The actual sort is done using Arrays.sort().

Parameters:

nameArray - the page names to be sorted