it.unimi.dsi.sux4j.mph
Class ZFastTrieDistributorMonotoneMinimalPerfectHashFunction<T>

java.lang.Object
  extended by it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction<K>
      extended by it.unimi.dsi.sux4j.mph.AbstractHashFunction<T>
          extended by it.unimi.dsi.sux4j.mph.ZFastTrieDistributorMonotoneMinimalPerfectHashFunction<T>
All Implemented Interfaces:
Function<T,Long>, Object2LongFunction<T>, Serializable

public class ZFastTrieDistributorMonotoneMinimalPerfectHashFunction<T>
extends AbstractHashFunction<T>
implements Serializable

A monotone minimal perfect hash implementation based on fixed-size bucketing that uses a z-fast trie as a distributor.

See Also:
Serialized Form

Field Summary
static long serialVersionUID
           
 
Fields inherited from class it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction
defRetValue
 
Constructor Summary
ZFastTrieDistributorMonotoneMinimalPerfectHashFunction(Iterable<? extends T> elements, TransformationStrategy<? super T> transform)
          Creates a new hollow-trie-based monotone minimal perfect hash function using the given elements and transformation strategy.
ZFastTrieDistributorMonotoneMinimalPerfectHashFunction(Iterable<? extends T> elements, TransformationStrategy<? super T> transform, int log2BucketSize)
          Creates a new hollow-trie-based monotone minimal perfect hash function using the given elements, transformation strategy and bucket size.
 
Method Summary
 long getLong(Object o)
           
static void main(String[] arg)
           
 long numBits()
           
 int size()
           
 
Methods inherited from class it.unimi.dsi.sux4j.mph.AbstractHashFunction
containsKey
 
Methods inherited from class it.unimi.dsi.fastutil.objects.AbstractObject2LongFunction
clear, defaultReturnValue, defaultReturnValue, get, put, put, remove, removeLong
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

serialVersionUID

public static final long serialVersionUID
See Also:
Constant Field Values
Constructor Detail

ZFastTrieDistributorMonotoneMinimalPerfectHashFunction

public ZFastTrieDistributorMonotoneMinimalPerfectHashFunction(Iterable<? extends T> elements,
                                                              TransformationStrategy<? super T> transform)
                                                       throws IOException
Creates a new hollow-trie-based monotone minimal perfect hash function using the given elements and transformation strategy.

Parameters:
elements - the elements among which the trie must be able to rank.
transform - a transformation strategy that must turn the elements in elements into a list of distinct, prefix-free, lexicographically increasing (in iteration order) bit vectors.
Throws:
IOException

ZFastTrieDistributorMonotoneMinimalPerfectHashFunction

public ZFastTrieDistributorMonotoneMinimalPerfectHashFunction(Iterable<? extends T> elements,
                                                              TransformationStrategy<? super T> transform,
                                                              int log2BucketSize)
                                                       throws IOException
Creates a new hollow-trie-based monotone minimal perfect hash function using the given elements, transformation strategy and bucket size.

This constructor is mainly for debugging and testing purposes.

Parameters:
elements - the elements among which the trie must be able to rank.
transform - a transformation strategy that must turn the elements in elements into a list of distinct, prefix-free, lexicographically increasing (in iteration order) bit vectors.
log2BucketSize - the logarithm of the bucket size.
Throws:
IOException
Method Detail

getLong

public long getLong(Object o)
Specified by:
getLong in interface Object2LongFunction<T>

size

public int size()
Specified by:
size in interface Function<T,Long>
Overrides:
size in class AbstractHashFunction<T>

numBits

public long numBits()

main

public static void main(String[] arg)
                 throws NoSuchMethodException,
                        IOException,
                        JSAPException
Throws:
NoSuchMethodException
IOException
JSAPException