org.dllearner.utilities

Class MapUtils

java.lang.Object

org.dllearner.utilities.MapUtils

public class MapUtils
extends Object

Utility class for operations on maps.

Author:

Lorenz Buehmann

Constructor Summary

Constructors

Constructor and Description
MapUtils()

Method Summary

Modifier and Type	Method and Description
static <K,V> String	asTSV(Map<K,V> map) Return map in TSV format.
static <K,V> String	asTSV(Map<K,V> map, String keyHeader, String valueHeader) Return map in TSV format.
static <K,V> com.google.common.collect.Multimap<K,V>	createMultiMap(Map<K,? extends Iterable<V>> input) Constructs a multimap with the same mappings as the specified map.
static <K extends Comparable,V extends Comparable> com.google.common.collect.Multimap<K,V>	createSortedMultiMap(Map<K,? extends Iterable<V>> input) Creates a Guava sorted multimap using the input map.
static <K,V extends Comparable<V>> List<Map.Entry<K,V>>	sortByValues(Map<K,V> map) Returns a list of entries sorted by the map values descending.
static <K,V extends Comparable<V>> List<Map.Entry<K,V>>	sortByValues(Map<K,V> map, boolean ascending) Returns a list of entries sorted by the map values either ascending or descending.

Methods inherited from class java.lang.Object

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

Constructor Detail

MapUtils

public MapUtils()

Method Detail

sortByValues

public static <K,V extends Comparable<V>> List<Map.Entry<K,V>> sortByValues(Map<K,V> map)

Returns a list of entries sorted by the map values descending.

Parameters:

map - the map

Returns:

a list of entries sorted by the map values descending.

sortByValues

public static <K,V extends Comparable<V>> List<Map.Entry<K,V>> sortByValues(Map<K,V> map,
                                                                            boolean ascending)

Returns a list of entries sorted by the map values either ascending or descending.

Parameters:

map - the map

Returns:

a list of entries sorted by the map values either ascending or descending.

createMultiMap

public static <K,V> com.google.common.collect.Multimap<K,V> createMultiMap(Map<K,? extends Iterable<V>> input)

Constructs a multimap with the same mappings as the specified map.

Parameters:

input - the input map

Returns:

the multimap

createSortedMultiMap

public static <K extends Comparable,V extends Comparable> com.google.common.collect.Multimap<K,V> createSortedMultiMap(Map<K,? extends Iterable<V>> input)

Creates a Guava sorted multimap using the input map.

Parameters:

input - the input map

Returns:

the multimap

asTSV

public static <K,V> String asTSV(Map<K,V> map)

Return map in TSV format.

Type Parameters:

K -

V -

Parameters:

map - the map

Returns:

TSV formatted String

asTSV

public static <K,V> String asTSV(Map<K,V> map,
                                 String keyHeader,
                                 String valueHeader)

Return map in TSV format.

Type Parameters:

K -

V -

Parameters:

map - the map

keyHeader - header for key column

valueHeader - header for value column

Returns:

TSV formatted String