edu.stanford.nlp.parser.shiftreduce

Class ShiftTransition

java.lang.Object

edu.stanford.nlp.parser.shiftreduce.ShiftTransition

All Implemented Interfaces:

Transition, java.io.Serializable

public class ShiftTransition
extends java.lang.Object
implements Transition

Transition that moves a single item from the front of the queue to the top of the stack without making any other changes.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
ShiftTransition()

Method Summary

Modifier and Type	Method and Description
State	apply(State state) Add the new preterminal to the stack, increment the queue position.
State	apply(State state, double scoreDelta) Add the new preterminal to the stack, increment the queue position.
boolean	equals(java.lang.Object o)
int	hashCode()
boolean	isLegal(State state, java.util.List<ParserConstraint> constraints) Shifting is legal as long as the state is not finished and there are more items on the queue to be shifted.
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

ShiftTransition

public ShiftTransition()

Method Detail

isLegal

public boolean isLegal(State state,
                       java.util.List<ParserConstraint> constraints)

Shifting is legal as long as the state is not finished and there are more items on the queue to be shifted. TODO: go through the papers and make sure they don't mention any other conditions where one shouldn't shift

Specified by:

isLegal in interface Transition

apply

public State apply(State state)

Add the new preterminal to the stack, increment the queue position.

Specified by:

apply in interface Transition

apply

public State apply(State state,
                   double scoreDelta)

Add the new preterminal to the stack, increment the queue position.

Specified by:

apply in interface Transition

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object