OnePassDataIndexer (Apache OpenNLP Tools 2.1.1 API)

java.lang.Object
- opennlp.tools.ml.model.AbstractDataIndexer
- - opennlp.tools.ml.model.OnePassDataIndexer

All Implemented Interfaces:

DataIndexer

Direct Known Subclasses:

OnePassRealValueDataIndexer
```
public class OnePassDataIndexer
extends AbstractDataIndexer
```
A DataIndexer for maxent model data which handles cutoffs for uncommon contextual predicates and provides a unique integer index for each of the predicates.

See Also:

DataIndexer, AbstractDataIndexer

- Field Summary
  - Fields inherited from class opennlp.tools.ml.model.AbstractDataIndexer
    CUTOFF_DEFAULT, CUTOFF_PARAM, SORT_DEFAULT, SORT_PARAM
- Constructor Summary
  
  Constructors
  Constructor Description
  
  OnePassDataIndexer()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  void index(ObjectStream<Event> eventStream)
  Performs the data indexing.
  - Methods inherited from class opennlp.tools.ml.model.AbstractDataIndexer
    getContexts, getNumEvents, getNumTimesEventsSeen, getOutcomeLabels, getOutcomeList, getPredCounts, getPredLabels, getValues, init
  - Methods inherited from class java.lang.Object
    equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - OnePassDataIndexer
```
public OnePassDataIndexer()
```
- Method Detail
  - index
```
public void index(ObjectStream<Event> eventStream)
           throws IOException
```
    Performs the data indexing.
    Note: Make sure the DataIndexer.init(TrainingParameters, Map) method is called first.
    
    Parameters:
    
    eventStream - A ObjectStream of events used as input.
    
    Throws:
    
    IOException - Thrown if IO errors occurred during indexing.