rita.support
Class PorterStemmerDCH

java.lang.Object
  rita.RiObject
      rita.support.PorterStemmerDCH

All Implemented Interfaces:

processing.core.PConstants, RiStemmerIF, RiConstants

public class PorterStemmerDCH
extends RiObject
implements RiStemmerIF

A simple stemmer for extracting base roots from a word by removing prefixes and suffixes. For example, the words 'run', 'runs', 'ran', and 'running' all have "run" as the root.

    String[] tests = { "run", "runs", "ran", "running" };
    RiStemmer stem = new RiStemmer(this);
    for (int i = 0; i < tests.length; i++)
      System.out.println(stem.stem(tests[i]));
 

Based on Martin Porter's stemmer algorithm detailed here: http://tartarus.org/~martin/PorterStemmer/

Field Summary

Fields inherited from interface rita.support.RiConstants

BEHAVIOR_COMPLETED, BOUNDING_BOX_ALPHA, BRILL_POS_TAGGER, EASE_IN, EASE_IN_CUBIC, EASE_IN_EXPO, EASE_IN_OUT, EASE_IN_OUT_CUBIC, EASE_IN_OUT_EXPO, EASE_IN_OUT_QUARTIC, EASE_IN_OUT_SINE, EASE_IN_QUARTIC, EASE_IN_SINE, EASE_OUT, EASE_OUT_CUBIC, EASE_OUT_EXPO, EASE_OUT_QUARTIC, EASE_OUT_SINE, ESS, FADE_COLOR, FADE_IN, FADE_OUT, FADE_TO_TEXT, FIRST_PERSON, FUTURE_TENSE, ID, LERP, LINEAR, MAXENT_POS_TAGGER, MINIM, MOVE, MUTABLE, PAST_TENSE, PHONEME_BOUNDARY, PHONEMES, PLING_STEMMER, PLURAL, PORTER_STEMMER, POS, PRESENT_TENSE, SCALE_TO, SECOND_PERSON, SENTENCE_BOUNDARY, SINGULAR, SONIA, SPEECH_COMPLETED, STRESSES, SYLLABLE_BOUNDARY, SYLLABLES, TEXT, TEXT_ENTERED, THIRD_PERSON, TIMER, TIMER_COMPLETED, TIMER_TICK, TOKENS, UNKNOWN, WORD_BOUNDARY

Fields inherited from interface processing.core.PConstants

A, AB, ADD, AG, ALPHA, ALPHA_MASK, ALT, AMBIENT, AR, ARC, ARGB, ARROW, B, BACKSPACE, BASELINE, BEEN_LIT, BEVEL, BLEND, BLUE_MASK, BLUR, BOTTOM, BOX, BURN, CENTER, CENTER_DIAMETER, CENTER_RADIUS, CHATTER, CLOSE, CMYK, CODED, COMPLAINT, CONTROL, CORNER, CORNERS, CROSS, CUSTOM, DA, DARKEST, DB, DEG_TO_RAD, DELETE, DG, DIAMETER, DIFFERENCE, DILATE, DIRECTIONAL, DISABLE_ACCURATE_TEXTURES, DISABLE_DEPTH_SORT, DISABLE_DEPTH_TEST, DISABLE_OPENGL_2X_SMOOTH, DISABLE_OPENGL_ERROR_REPORT, DODGE, DOWN, DR, DXF, EB, EDGE, EG, ELLIPSE, ENABLE_ACCURATE_TEXTURES, ENABLE_DEPTH_SORT, ENABLE_DEPTH_TEST, ENABLE_NATIVE_FONTS, ENABLE_OPENGL_2X_SMOOTH, ENABLE_OPENGL_4X_SMOOTH, ENABLE_OPENGL_ERROR_REPORT, ENTER, EPSILON, ER, ERODE, ERROR_BACKGROUND_IMAGE_FORMAT, ERROR_BACKGROUND_IMAGE_SIZE, ERROR_PUSHMATRIX_OVERFLOW, ERROR_PUSHMATRIX_UNDERFLOW, ERROR_TEXTFONT_NULL_PFONT, ESC, EXCLUSION, G, GIF, GRAY, GREEN_MASK, HALF_PI, HAND, HARD_LIGHT, HINT_COUNT, HSB, IMAGE, INVERT, JAVA2D, JPEG, LEFT, LIGHTEST, LINE, LINES, LINUX, MACOSX, MAX_FLOAT, MAX_INT, MIN_FLOAT, MIN_INT, MITER, MODEL, MULTIPLY, NORMAL, NORMALIZED, NX, NY, NZ, OPAQUE, OPEN, OPENGL, ORTHOGRAPHIC, OTHER, OVERLAY, P2D, P3D, PATH, PDF, PERSPECTIVE, PI, platformNames, POINT, POINTS, POLYGON, POSTERIZE, PROBLEM, PROJECT, QUAD, QUAD_STRIP, QUADS, QUARTER_PI, R, RAD_TO_DEG, RADIUS, RECT, RED_MASK, REPLACE, RETURN, RGB, RIGHT, ROUND, SA, SB, SCREEN, SG, SHAPE, SHIFT, SHINE, SOFT_LIGHT, SPB, SPG, SPHERE, SPOT, SPR, SQUARE, SR, SUBTRACT, SW, TAB, TARGA, THIRD_PI, THRESHOLD, TIFF, TOP, TRIANGLE, TRIANGLE_FAN, TRIANGLE_STRIP, TRIANGLES, TWO_PI, TX, TY, TZ, U, UP, V, VERTEX_FIELD_COUNT, VW, VX, VY, VZ, WAIT, WHITESPACE, WINDOWS, X, Y, Z

Constructor Summary

PorterStemmerDCH()

PorterStemmerDCH(processing.core.PApplet pApplet)

Method Summary

static boolean	isCacheEnabled() Returns whethe the cache is enabled
static void	main(java.lang.String[] args)
static void	setCacheEnabled(boolean enableCache) Sets whether the cache is enabled and duplicate requests are returned immediately rather than re-computed (default=true).
java.lang.String	stem(java.lang.String toStem) The basic stemming method: extracts base roots from a word by removing prefixes and suffixes.

Methods inherited from class rita.RiObject

dispose, getId, getPApplet, nextId

Methods inherited from class java.lang.Object

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

Constructor Detail

PorterStemmerDCH

public PorterStemmerDCH()

Invisible:

PorterStemmerDCH

public PorterStemmerDCH(processing.core.PApplet pApplet)

Method Detail

isCacheEnabled

public static boolean isCacheEnabled()

Returns whethe the cache is enabled

Invisible:

setCacheEnabled

public static void setCacheEnabled(boolean enableCache)

Sets whether the cache is enabled and duplicate requests are returned immediately rather than re-computed (default=true).

Invisible:

stem

public java.lang.String stem(java.lang.String toStem)

The basic stemming method: extracts base roots from a word by removing prefixes and suffixes. For example, the words 'run', 'runs', 'ran', and 'running' all have "run" as the root.

Specified by:

stem in interface RiStemmerIF

Parameters:

toStem -

main

public static void main(java.lang.String[] args)