Class CollectionUtils

java.lang.Object

net.thevpc.common.collections.CollectionUtils

public class CollectionUtils
extends Object

Constructor Summary

Constructors

Constructor	Description
CollectionUtils()

Method Summary

Modifier and Type	Method	Description
static <A,B> List<B>	convert(List<A> list, Function<A,B> converter)
<F,T> List<T>	convertList(List<F> from, Function<F,T> converter)	created a view on the List where each element is replaced by it converter
static <T> List<T>	filter(Collection<T> collection, CollectionFilter<T> filter)
static <T> List<List<T>>	groupBy(Collection<T> anyList, int groupSize)
static <T> List<T>	head(List<T> anyList, int maxSize)
static <K,V> Map<K,V>	mergeMaps(Map<K,V> source, Map<K,V> dest)
static <T> Collection<T>	removeAll(Collection<T> values, Predicate<T> filter)
static <T> Collection<T>	retainAll(Collection<T> values, Predicate<T> filter)
static <T> List<List<T>>	splitBy(Collection<T> anyList, int groupSize)
static <T> List<T>	tail(List<T> anyList, int maxSize)
static <T> List<T>	toList(Iterable<T> it)
static <T> List<T>	toList(Iterator<T> it)
static Set<String>	toSet(String[] values0, boolean trim, boolean ignoreEmpty, boolean ignoreNull)
static <V> Collection<V>	unmodifiableCollection(Collection<V> list)
static <V> List<V>	unmodifiableList(List<V> list)
static <K,V> Map<K,V>	unmodifiableMap(Map<K,V> map)
static <K,V> KeyValueList<K,V>	unmodifiableMapList(KeyValueList<K,V> list)

Methods inherited from class Object

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

Constructor Details

CollectionUtils

public CollectionUtils()

Method Details

head

public static <T> List<T> head(List<T> anyList,
 int maxSize)

tail

public static <T> List<T> tail(List<T> anyList,
 int maxSize)

splitBy

public static <T> List<List<T>> splitBy(Collection<T> anyList,
 int groupSize)

groupBy

public static <T> List<List<T>> groupBy(Collection<T> anyList,
 int groupSize)

convert

public static <A,B> List<B> convert(List<A> list,
 Function<A,B> converter)

filter

public static <T> List<T> filter(Collection<T> collection,
 CollectionFilter<T> filter)

toList

public static <T> List<T> toList(Iterator<T> it)

toList

public static <T> List<T> toList(Iterable<T> it)

unmodifiableMapList

public static <K,V> KeyValueList<K,V> unmodifiableMapList(KeyValueList<K,V> list)

unmodifiableMap

public static <K,V> Map<K,V> unmodifiableMap(Map<K,V> map)

unmodifiableList

public static <V> List<V> unmodifiableList(List<V> list)

unmodifiableCollection

public static <V> Collection<V> unmodifiableCollection(Collection<V> list)

retainAll

public static <T> Collection<T> retainAll(Collection<T> values,
 Predicate<T> filter)

removeAll

public static <T> Collection<T> removeAll(Collection<T> values,
 Predicate<T> filter)

convertList

public <F,T> List<T> convertList(List<F> from,
 Function<F,T> converter)

created a view on the List where each element is replaced by it converter

Type Parameters:

F -

T -

Parameters:

from -

converter -

Returns:

mergeMaps

public static <K,V> Map<K,V> mergeMaps(Map<K,V> source,
 Map<K,V> dest)

toSet

public static Set<String> toSet(String[] values0,
 boolean trim,
 boolean ignoreEmpty,
 boolean ignoreNull)