org.heigit.bigspatialdata.oshdb.api.generic

Class OSHDBCombinedIndex<U extends Comparable<U> & Serializable,V extends Comparable<V> & Serializable>

java.lang.Object

org.heigit.bigspatialdata.oshdb.api.generic.OSHDBCombinedIndex<U,V>

All Implemented Interfaces:

Serializable, Comparable<OSHDBCombinedIndex<U,V>>

public class OSHDBCombinedIndex<U extends Comparable<U> & Serializable,V extends Comparable<V> & Serializable>
extends Object
implements Comparable<OSHDBCombinedIndex<U,V>>, Serializable

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
OSHDBCombinedIndex(U index1, V index2)

Method Summary

Modifier and Type	Method and Description
int	compareTo(OSHDBCombinedIndex<U,V> other)
boolean	equals(Object obj)
U	getFirstIndex()
V	getSecondIndex()
int	hashCode()
static <A,U extends Comparable<U> & Serializable,V extends Comparable<V> & Serializable> SortedMap<U,SortedMap<V,A>>	nest(Map<OSHDBCombinedIndex<U,V>,A> result) Helper function that converts the dual-index data structure returned by aggregation operations on this object to a nested Map structure, which can be easier to process further on.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

OSHDBCombinedIndex

public OSHDBCombinedIndex(U index1,
                          V index2)

Method Detail

getFirstIndex

public U getFirstIndex()

getSecondIndex

public V getSecondIndex()

compareTo

public int compareTo(@NotNull
                     OSHDBCombinedIndex<U,V> other)

Specified by:

compareTo in interface Comparable<OSHDBCombinedIndex<U extends Comparable<U> & Serializable,V extends Comparable<V> & Serializable>>

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object

nest

public static <A,U extends Comparable<U> & Serializable,V extends Comparable<V> & Serializable> SortedMap<U,SortedMap<V,A>> nest(Map<OSHDBCombinedIndex<U,V>,A> result)

Helper function that converts the dual-index data structure returned by aggregation operations on this object to a nested Map structure, which can be easier to process further on.

This version creates a map for each <U> index value, containing maps containing results by timestamps.

Type Parameters:

A - an arbitrary data type, used for the data value items

U - an arbitrary data type, used for the index'es key items

V - an arbitrary data type, used for the index'es key items

Parameters:

result - the "flat" result data structure that should be converted to a nested structure

Returns:

a nested data structure: for each index part there is a separate level of nested maps