SnowballStemmer (DKPro Core - Master Aggregator 1.7.0 API)

java.lang.Object
- org.apache.uima.analysis_component.AnalysisComponent_ImplBase
- - org.apache.uima.analysis_component.Annotator_ImplBase
  - - org.apache.uima.analysis_component.JCasAnnotator_ImplBase
    - - org.apache.uima.fit.component.JCasAnnotator_ImplBase
      - de.tudarmstadt.ukp.dkpro.core.api.featurepath.FeaturePathAnnotatorBase
        
        de.tudarmstadt.ukp.dkpro.core.snowball.SnowballStemmer

All Implemented Interfaces:

org.apache.uima.analysis_component.AnalysisComponent
```
public class SnowballStemmer
extends FeaturePathAnnotatorBase
```
UIMA wrapper for the Snowball stemmer. Annotation types to be stemmed can beconfigured by a FeaturePath.

If you use this component in a pipeline which uses stop word removal, make sure that it runs after the stop word removal step, so only words that are no stop words are stemmed.

Since:

1.1.0

Author:

Benjamin Herbert, Richard Eckart de Castilho

See Also:
Snowball stemmer homepage, FeaturePathAnnotatorBase

Field Summary

Fields
Modifier and Type	Field and Description
`protected String`	`language`
`static Map<String,String>`	`languages`
`protected boolean`	`lowerCase`
`static String`	`PARAM_LANGUAGE` Use this language instead of the document language to resolve the model.
`static String`	`PARAM_LOWER_CASE` Per default the stemmer runs in case-sensitive mode.

Fields inherited from class de.tudarmstadt.ukp.dkpro.core.api.featurepath.FeaturePathAnnotatorBase
filterCondition, filterConditionOperator, filterConditionValue, filterFeaturePath, filterFeaturePathInfo, fp, PARAM_FILTER_CONDITION_OPERATOR, PARAM_FILTER_CONDITION_VALUE, PARAM_FILTER_FEATUREPATH, PARAM_PATHS, paths

Constructor Summary

Constructors
Constructor and Description

SnowballStemmer()

Constructors
Constructor and Description
`SnowballStemmer()`

Method Summary

Methods
Modifier and Type Method and Description

protected void generateAnnotations(org.apache.uima.jcas.JCas jcas)
Method to create annotations.

protected Set<String> getDefaultPaths()
- Methods inherited from class de.tudarmstadt.ukp.dkpro.core.api.featurepath.FeaturePathAnnotatorBase
  initialize, initializeFeaturePathInfoFrom, process
- Methods inherited from class org.apache.uima.fit.component.JCasAnnotator_ImplBase
  getLogger
- Methods inherited from class org.apache.uima.analysis_component.JCasAnnotator_ImplBase
  getRequiredCasInterface, process
- Methods inherited from class org.apache.uima.analysis_component.Annotator_ImplBase
  getCasInstancesRequired, hasNext, next
- Methods inherited from class org.apache.uima.analysis_component.AnalysisComponent_ImplBase
  batchProcessComplete, collectionProcessComplete, destroy, getContext, getResultSpecification, reconfigure, setResultSpecification
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods
Modifier and Type	Method and Description
`protected void`	`generateAnnotations(org.apache.uima.jcas.JCas jcas)` Method to create annotations.
`protected Set<String>`	`getDefaultPaths()`

- Field Detail
  - PARAM_LANGUAGE
```
public static final String PARAM_LANGUAGE
```
    Use this language instead of the document language to resolve the model.
    
    See Also:
    Constant Field Values
  - language
```
protected String language
```
  - PARAM_LOWER_CASE
```
public static final String PARAM_LOWER_CASE
```
    Per default the stemmer runs in case-sensitive mode. If this parameter is enabled, tokens are lower-cased before being passed to the stemmer.
    Examples
    false (default) true
    
    EDUCATIONAL EDUCATIONAL educ
    
    Educational Educat educ
    
    educational educ educ
    
    See Also:
    Constant Field Values
  - lowerCase
```
protected boolean lowerCase
```
  - languages
```
public static final Map<String,String> languages
```
- Constructor Detail
  - SnowballStemmer
```
public SnowballStemmer()
```
- Method Detail
  - getDefaultPaths
```
protected Set<String> getDefaultPaths()
```
    Overrides:
    
    getDefaultPaths in class FeaturePathAnnotatorBase
  - generateAnnotations
```
protected void generateAnnotations(org.apache.uima.jcas.JCas jcas)
                            throws org.apache.uima.analysis_engine.AnalysisEngineProcessException,
                                   FeaturePathException
```
    Description copied from class: FeaturePathAnnotatorBase
    
    Method to create annotations.
    
    Specified by:
    
    generateAnnotations in class FeaturePathAnnotatorBase
    
    Parameters:
    jcas - the JCas.
    
    Throws:
    
    org.apache.uima.analysis_engine.AnalysisEngineProcessException - if another error occurs.
    
    FeaturePathException - if an error occurs during initialization of the FeaturePathInfo object

	false (default)	true
EDUCATIONAL	EDUCATIONAL	educ
Educational	Educat	educ
educational	educ	educ

Class SnowballStemmer

Field Summary

Fields inherited from class de.tudarmstadt.ukp.dkpro.core.api.featurepath.FeaturePathAnnotatorBase

Constructor Summary

Method Summary

Methods inherited from class de.tudarmstadt.ukp.dkpro.core.api.featurepath.FeaturePathAnnotatorBase

Methods inherited from class org.apache.uima.fit.component.JCasAnnotator_ImplBase

Methods inherited from class org.apache.uima.analysis_component.JCasAnnotator_ImplBase

Methods inherited from class org.apache.uima.analysis_component.Annotator_ImplBase

Methods inherited from class org.apache.uima.analysis_component.AnalysisComponent_ImplBase

Methods inherited from class java.lang.Object

Field Detail

PARAM_LANGUAGE

language

PARAM_LOWER_CASE

lowerCase

languages

Constructor Detail

SnowballStemmer

Method Detail

getDefaultPaths

generateAnnotations