org.opentripplanner.util

Class MapUtils

java.lang.Object

org.opentripplanner.util.MapUtils

public class MapUtils
extends Object

Constructor Summary

Constructors

Constructor and Description
MapUtils()

Method Summary

Modifier and Type	Method and Description
static <T,U> void	addToMapList(Map<T,List<U>> mapList, T key, U value) An extremely common pattern: add an item to a list in a hash value, creating that list if necessary TODO: Replace with Guava
static <T,U> void	addToMapListUnique(Map<T,List<U>> mapList, T key, List<U> values)
static <T,U> void	addToMapSet(Map<T,Set<U>> mapList, T key, U value) An extremely common pattern: add an item to a set in a hash value, creating that set if necessary TODO: Replace with Guava
static <T> boolean	addToMaxMap(Map<T,Double> map, T key, double value)
static <S,T> List<T>	mapToList(Collection<S> entities, Function<S,T> mapper) Map a collection of objects of type S to a list of type T using the provided mapping function.
static <T,U,V extends Collection<U>> void	mergeInUnique(Map<T,V> mapList, Map<T,V> from)

Methods inherited from class java.lang.Object

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

Constructor Detail

MapUtils

public MapUtils()

Method Detail

addToMapSet

public static final <T,U> void addToMapSet(Map<T,Set<U>> mapList,
                                           T key,
                                           U value)

An extremely common pattern: add an item to a set in a hash value, creating that set if necessary TODO: Replace with Guava

addToMapList

public static final <T,U> void addToMapList(Map<T,List<U>> mapList,
                                            T key,
                                            U value)

An extremely common pattern: add an item to a list in a hash value, creating that list if necessary TODO: Replace with Guava

addToMaxMap

public static final <T> boolean addToMaxMap(Map<T,Double> map,
                                            T key,
                                            double value)

addToMapListUnique

public static <T,U> void addToMapListUnique(Map<T,List<U>> mapList,
                                            T key,
                                            List<U> values)

mergeInUnique

public static <T,U,V extends Collection<U>> void mergeInUnique(Map<T,V> mapList,
                                                               Map<T,V> from)

mapToList

public static <S,T> List<T> mapToList(Collection<S> entities,
                                      Function<S,T> mapper)

Map a collection of objects of type S to a list of type T using the provided mapping function.

Nullsafe: if entities is null, then null is returned.