de.spieleck.app.jacson.filter
Class StemmingFilter

java.lang.Object
  de.spieleck.app.jacson.PluginBase
      de.spieleck.app.jacson.filter.FilterBase
          de.spieleck.app.jacson.filter.StemmingFilter

All Implemented Interfaces:

ConfigVerify.Acceptor, JacsonChunkDrain, JacsonFilter, JacsonRegistrable, JacsonReporting, JacsonStately

public class StemmingFilter

extends FilterBase

implements ConfigVerify.Acceptor

Filter to stemm a chunk. The returned chunks are either Strings representing the stemms or the String corresponding to the first word found connected with this particular stemm.

Author:

fsn

Nested Class Summary

static class

StemmingFilter.Stat

Field Summary

protected boolean	returnWord Shall we return chunks which are words or stemms
protected java.util.Map	stats Map the equivalence classes of words to stemms.
protected Stemmer	stemmer The Stemmer to be used by this filter as a class
static java.lang.String	STEMMER_NODE Config node to choose the stemmer
static java.lang.String	STEMMER_PCK Defaultpackage for stemmers
protected java.lang.String	stemmerName The Stemmer to be used by this filter as a name
static java.lang.String	WORD_NODE Config node to tell the stemmer to return representatives not stems

Fields inherited from class de.spieleck.app.jacson.filter.FilterBase

drain

Constructor Summary

StemmingFilter()

Method Summary

boolean	accept(ConfigNode node)
Stemmer	getStemmer(ConfigNode node, JacsonRegistry registry)
void	init(ConfigNode config, JacsonRegistry registry)
void	putChunk(java.lang.String chunk) Feed a single chunk into this filter
protected java.lang.String	statistic(java.lang.String old, java.lang.String stem)
void	summary() Do nothing default implementation

Methods inherited from class de.spieleck.app.jacson.filter.FilterBase

setDrain

Methods inherited from class de.spieleck.app.jacson.PluginBase

getRegReport, getRegState, registerReport, registerState

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.spieleck.app.jacson.JacsonStately

registerState

Methods inherited from interface de.spieleck.app.jacson.JacsonReporting

registerReport

Field Detail

STEMMER_NODE

public static final java.lang.String STEMMER_NODE

Config node to choose the stemmer

See Also:

Constant Field Values

WORD_NODE

public static final java.lang.String WORD_NODE

Config node to tell the stemmer to return representatives not stems

See Also:

Constant Field Values

STEMMER_PCK

public static final java.lang.String STEMMER_PCK

Defaultpackage for stemmers

See Also:

Constant Field Values

stemmerName

protected java.lang.String stemmerName

The Stemmer to be used by this filter as a name

stemmer

protected Stemmer stemmer

The Stemmer to be used by this filter as a class

stats

protected java.util.Map stats

Map the equivalence classes of words to stemms.

returnWord

protected boolean returnWord

Shall we return chunks which are words or stemms

Constructor Detail

StemmingFilter

public StemmingFilter()

Method Detail

init

public void init(ConfigNode config,
                 JacsonRegistry registry)
          throws JacsonConfigException

Specified by:

init in interface JacsonRegistrable

Throws:

JacsonConfigException

accept

public boolean accept(ConfigNode node)

Specified by:

accept in interface ConfigVerify.Acceptor

putChunk

public void putChunk(java.lang.String chunk)
              throws JacsonException

Description copied from interface: JacsonChunkDrain

Feed a single chunk into this filter

Specified by:

putChunk in interface JacsonChunkDrain

Throws:

JacsonException

statistic

protected java.lang.String statistic(java.lang.String old,
                                     java.lang.String stem)

summary

public void summary()

Description copied from class: PluginBase

Do nothing default implementation

Specified by:

summary in interface JacsonReporting

Overrides:

summary in class PluginBase

getStemmer

public Stemmer getStemmer(ConfigNode node,
                          JacsonRegistry registry)
                   throws JacsonConfigException

Throws:

JacsonConfigException