SparseTransitionModel.java

package edu.berkeley.cs.nlp.ocular.model.transition;

import java.util.Collection;

import edu.berkeley.cs.nlp.ocular.gsm.GlyphChar;
import edu.berkeley.cs.nlp.ocular.model.TransitionStateType;
import edu.berkeley.cs.nlp.ocular.util.Tuple2;

/**
 * @author Taylor Berg-Kirkpatrick (tberg@eecs.berkeley.edu)
 */
public interface SparseTransitionModel {
	public static interface TransitionState {

		public int getLanguageIndex();
		
		/**
		 * The index of the character that was generated by the language model.
		 */
		public int getLmCharIndex();

		/**
		 * The index of the character that will be rendered, as opposed to the 
		 * underlying character generated by the language model.
		 */
		public GlyphChar getGlyphChar();

		public TransitionStateType getType();
		public int getOffset();
		public int getExposure();
		
		public Collection<Tuple2<TransitionState,Double>> forwardTransitions();
		public Collection<Tuple2<TransitionState,Double>> nextLineStartStates();
		public double endLogProb();
	}
	
	public Collection<Tuple2<TransitionState,Double>> startStates();
}