edu.illinois.cs.cogcomp.edison.features.helpers

Class FeatureCreatorUtil

java.lang.Object

edu.illinois.cs.cogcomp.edison.features.helpers.FeatureCreatorUtil

public class FeatureCreatorUtil
extends Object

join String objects to form features, efficiently

Constructor Summary

Constructors

Constructor and Description
FeatureCreatorUtil()

Method Summary

Modifier and Type	Method and Description
static DiscreteFeature	createFeatureFromArray(String[] pieces)
static IntPair	getWindowSpan(Constituent c, int windowStart, int windowEnd, boolean ignoreSentenceBoundaries) adjust initial window start/end based on how far word context extends in terms of the underlying text/sentence (depending on ignoreSentenceBoundaries flag).

Methods inherited from class java.lang.Object

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

Constructor Detail

FeatureCreatorUtil

public FeatureCreatorUtil()

Method Detail

createFeatureFromArray

public static DiscreteFeature createFeatureFromArray(String[] pieces)

getWindowSpan

public static IntPair getWindowSpan(Constituent c,
                                    int windowStart,
                                    int windowEnd,
                                    boolean ignoreSentenceBoundaries)

adjust initial window start/end based on how far word context extends in terms of the underlying text/sentence (depending on ignoreSentenceBoundaries flag). IMPORTANT: this expresses a window relative to the Constituent start and end token indexes, so the end will be different for a 3-token NER Constituent than for a Word Constituent.

Parameters:

c - Constituent at "center" of window

windowStart - desired relative start offset

windowEnd - desired relative end offset

ignoreSentenceBoundaries - if 'true', allow window to extend past a sentence boundary iff there are tokens at the relevant indexes.

Returns:

a span specifying the actual relative window offsets adjusted as necessary.