com.hfg.util.collection

Class CollectionUtil

java.lang.Object

com.hfg.util.collection.CollectionUtil

public class CollectionUtil
extends Object

Collection utility functions.

Constructor Summary

Constructors

Constructor and Description
CollectionUtil()

Method Summary

Modifier and Type	Method and Description
static <T> List<List<T>>	chunk(Collection<T> inCollection, int inChunkSize)
static <T> List<List<T>>	chunkList(List<T> inList, int inChunkSize)
static <T> T	getRandomListItem(List<T> inCollection)
static boolean	hasSingleValue(Collection inCollection) Returns whether or not the specified Collection contains a single value.
static boolean	hasValues(Collection inCollection) Returns whether or not the specified Collection contains values.
static boolean	hasValues(Map inMap) Returns whether or not the specified Map contains values.
static <K,V extends Comparable<? super V>> Map<K,V>	sortMapByValue(Map<K,V> inMap)
static <K,V extends Comparable<? super V>> Map<K,V>	sortMapByValue(Map<K,V> inMap, SortOrder inSortOrder)
static float	sum(Collection<? extends Number> inCollection) Returns the sum of the specified Collection.

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionUtil

public CollectionUtil()

Method Detail

hasValues

public static boolean hasValues(Collection inCollection)

Returns whether or not the specified Collection contains values.

Parameters:

inCollection - the Collection to evaluate

Returns:

whether or not the specified collection contains values

hasValues

public static boolean hasValues(Map inMap)

Returns whether or not the specified Map contains values.

Parameters:

inMap - the Map to evaluate

Returns:

whether or not the specified Map contains values

hasSingleValue

public static boolean hasSingleValue(Collection inCollection)

Returns whether or not the specified Collection contains a single value.

Parameters:

inCollection - the Collection to evaluate

Returns:

whether or not the specified collection has a single value

sum

public static float sum(Collection<? extends Number> inCollection)

Returns the sum of the specified Collection.

Parameters:

inCollection - the Collection of numbers to sum

Returns:

the sum of the collection

chunk

public static <T> List<List<T>> chunk(Collection<T> inCollection,
                                      int inChunkSize)

chunkList

public static <T> List<List<T>> chunkList(List<T> inList,
                                          int inChunkSize)

sortMapByValue

public static <K,V extends Comparable<? super V>> Map<K,V> sortMapByValue(Map<K,V> inMap)

sortMapByValue

public static <K,V extends Comparable<? super V>> Map<K,V> sortMapByValue(Map<K,V> inMap,
                                                                          SortOrder inSortOrder)

getRandomListItem

public static <T> T getRandomListItem(List<T> inCollection)