cc.mallet.fst
Class SumLatticeConstrained

java.lang.Object
  cc.mallet.fst.SumLatticeDefault
      cc.mallet.fst.SumLatticeConstrained

All Implemented Interfaces:

SumLattice

public class SumLatticeConstrained
extends SumLatticeDefault

Nested Class Summary

Nested classes/interfaces inherited from class cc.mallet.fst.SumLatticeDefault

SumLatticeDefault.Factory, SumLatticeDefault.LatticeNode

Field Summary

Fields inherited from class cc.mallet.fst.SumLatticeDefault

saveXis

Constructor Summary

SumLatticeConstrained(Transducer t, Sequence input, Sequence output, Segment requiredSegment, Sequence constrainedSequence)

SumLatticeConstrained(Transducer trans, Sequence input, Sequence output, Transducer.Incrementor incrementor, LabelAlphabet outputAlphabet, int[] constraints)
Create a lattice that constrains its transitions such that the pairs in "constraints" are adhered to.

Method Summary

Methods inherited from class cc.mallet.fst.SumLatticeDefault

getAlpha, getBeta, getGammaProbability, getGammaProbability, getGammas, getGammaWeight, getGammaWeight, getInput, getLabelingAtPosition, getLatticeNode, getTotalWeight, getTransducer, getXiProbability, getXis, getXiWeight, length

Methods inherited from class java.lang.Object

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

Constructor Detail

SumLatticeConstrained

public SumLatticeConstrained(Transducer t,
                             Sequence input,
                             Sequence output,
                             Segment requiredSegment,
                             Sequence constrainedSequence)

SumLatticeConstrained

public SumLatticeConstrained(Transducer trans,
                             Sequence input,
                             Sequence output,
                             Transducer.Incrementor incrementor,
                             LabelAlphabet outputAlphabet,
                             int[] constraints)

Create a lattice that constrains its transitions such that the pairs in "constraints" are adhered to. constraints is an array where each entry is the index of the required label at that position. An entry of 0 means there are no constraints on that . Positive values mean the path must pass through that state. Negative values mean the path must _not_ pass through that state. NOTE - constraints.length must be equal to output.size() + 1. A lattice has one extra position for the initial state. Generally, this should be unconstrained, since it does not produce an observation.