edu.washington.cs.knowitall.sequence
Interface LayeredSequence

All Known Implementing Classes:

BIOLayeredSequence, ChunkedArgumentExtraction, ChunkedExtraction, ChunkedSentence, NormalizedField, SimpleLayeredSequence

public interface LayeredSequence

Represents a layered sequence of strings. An example of a layered sequence is a POS-tagged sentence, which has a word layer, and a POS tag layer. This interface defines the basic functionality expected from a layered sequence, namely the ability to access the value of the sequence at a given index of the given layer.

Author:

afader

Method Summary

String	get(String layerName, int index)
Collection<String>	getLayerNames()
int	getLength()
int	getNumLayers()
boolean	hasLayer(String layerName)

Method Detail

get

String get(String layerName,
           int index)

Parameters:

layerName -

index -

Returns:

the value at the given position.

Throws:

IndexOutOfBoundsException - if the index is out of range

IllegalArgumentException - if a layer with name layerName does not exist

getLayerNames

Collection<String> getLayerNames()

Returns:

the layer names

hasLayer

boolean hasLayer(String layerName)

Parameters:

layerName -

Returns:

true if this sequence has a layer with the given name

getNumLayers

int getNumLayers()

Returns:

the number of layers

getLength

int getLength()

Returns:

the length of the sequence