info.informatica.util
Class CollectionsUtil

java.lang.Object
  info.informatica.util.CollectionsUtil

public class CollectionsUtil
extends Object

Convenience class for Collections utility functions

Version:

1.02

Author:

amengual at informatica dot info

Constructor Summary

CollectionsUtil()

Method Summary

static <V> Set<LabeledContainer<V>>	combineStringMap(Map<String,V> mapa, Comparator<? super LabeledContainer<V>> comp)
static <E> Map<E,Integer>	frequency(Iterator<E> it) Given an iterator, it returns a Map relating the objects in the iterator with their (Integer) frequency.
static <V,K> Map<V,K>	swapKeys(Map<K,V> mapa)

Methods inherited from class java.lang.Object

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

Constructor Detail

CollectionsUtil

public CollectionsUtil()

Method Detail

combineStringMap

public static <V> Set<LabeledContainer<V>> combineStringMap(Map<String,V> mapa,
                                                            Comparator<? super LabeledContainer<V>> comp)

swapKeys

public static <V,K> Map<V,K> swapKeys(Map<K,V> mapa)

frequency

public static <E> Map<E,Integer> frequency(Iterator<E> it)

Given an iterator, it returns a Map relating the objects in the iterator with their (Integer) frequency. Only makes sense for Lists which allows duplicates