Package org.egothor.stemmer.trie

Class ReducedNode<V>

java.lang.Object

org.egothor.stemmer.trie.ReducedNode<V>

Type Parameters:

V - value type

public final class ReducedNode<V>
extends Object

Canonical reduced node used during subtree merging.

The maps exposed by the accessors are the internal backing state of the canonical reduced node. They are returned directly for efficiency and are intended only for closely related trie-reduction infrastructure.

Constructor Summary

Constructors

Constructor	Description
ReducedNode(ReductionSignature<V> signature, Map<V,Integer> localCounts, Map<Character,ReducedNode<V>> children)	Creates a new reduced node.

Method Summary

Modifier and Type	Method	Description
Map<Character,ReducedNode<V>>	children()	Returns the internal canonical child map indexed by transition character.
Map<V,Integer>	localCounts()	Returns the internal aggregated local value-count map.
void	mergeChildren(Map<Character,ReducedNode<V>> additionalChildren)	Merges child references into this node.
void	mergeLocalCounts(Map<V,Integer> additionalCounts)	Merges additional local counts into this node.
ReductionSignature<V>	signature()	Returns the reduction signature of this canonical node.

Methods inherited from class java.lang.Object

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

Constructor Details

ReducedNode

public ReducedNode(ReductionSignature<V> signature,
 Map<V,Integer> localCounts,
 Map<Character,ReducedNode<V>> children)

Creates a new reduced node.

Parameters:

signature - reduction signature

localCounts - local counts

children - children

Method Details

signature

public ReductionSignature<V> signature()

Returns the reduction signature of this canonical node.

Returns:

reduction signature

localCounts

public Map<V,Integer> localCounts()

Returns the internal aggregated local value-count map.

The returned map is the internal backing state of this canonical reduced node and is exposed only for efficient cooperation with trie-reduction infrastructure.

Returns:

internal aggregated local value-count map

children

public Map<Character,ReducedNode<V>> children()

Returns the internal canonical child map indexed by transition character.

The returned map is the internal backing state of this canonical reduced node and is exposed only for efficient cooperation with trie-reduction infrastructure.

Returns:

internal canonical child map

mergeLocalCounts

public void mergeLocalCounts(Map<V,Integer> additionalCounts)

Merges additional local counts into this node.

Parameters:

additionalCounts - additional local counts

mergeChildren

public void mergeChildren(Map<Character,ReducedNode<V>> additionalChildren)

Merges child references into this node.

For nodes with the same reduction signature, child edge sets and child signatures must be compatible. This method therefore only needs to verify consistency and store the canonical child instance.

Parameters:

additionalChildren - additional children