Package opennlp.tools.ml.perceptron

Class PerceptronModelReader

java.lang.Object

opennlp.tools.ml.model.AbstractModelReader

opennlp.tools.ml.perceptron.PerceptronModelReader

Direct Known Subclasses:

BinaryPerceptronModelReader

public class PerceptronModelReader
extends AbstractModelReader

The base class for readers of models. It assumes that models are saved in the following sequence:
Perceptron (model type identifier)
1. # of parameters (int)
2. # of outcomes (int)
* list of outcome names (String)
3. # of different types of outcome patterns (int)
* list of (int int[])
[# of predicates for which outcome pattern is true] [outcome pattern]
4. # of predicates (int)
* list of predicate names (String)

See Also:

• PerceptronModel
• AbstractModelReader

Constructor Summary

Constructors

Constructor	Description
PerceptronModelReader(File file)	Initializes a PerceptronModelReader via a File.
PerceptronModelReader(DataReader dataReader)	Initializes a PerceptronModelReader via a DataReader.

Method Summary

Modifier and Type	Method	Description
void	checkModelType()	Reads the mode type from the underlying reader and informs if it not a Perceptron model.
AbstractModel	constructModel()	Constructs a model.

Methods inherited from class opennlp.tools.ml.model.AbstractModelReader

getModel, readDouble, readInt, readUTF

Methods inherited from class java.lang.Object

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

Constructor Details

PerceptronModelReader

public PerceptronModelReader(File file)
                      throws IOException

Initializes a PerceptronModelReader via a File.

Parameters:

file - The File that references the model to be read.

Throws:

IOException - Thrown if IO errors occurred.

PerceptronModelReader

public PerceptronModelReader(DataReader dataReader)

Initializes a PerceptronModelReader via a DataReader.

Parameters:

dataReader - The DataReader that references the model to be read.

Method Details

constructModel

public AbstractModel constructModel()
                             throws IOException

Constructs a model.

If you are creating a reader for a format which won't work with this (perhaps a database or xml file), override this method and ignore the other methods provided in this abstract class.

Specified by:

constructModel in class AbstractModelReader

Returns:

A PerceptronModel reconstructed from a model's (read) attributes.

Throws:

IOException - Thrown if IO errors occurred during (re-)construction.

checkModelType

public void checkModelType()
                    throws IOException

Reads the mode type from the underlying reader and informs if it not a Perceptron model.

Specified by:

checkModelType in class AbstractModelReader

Throws:

IOException - Thrown if IO errors occurred.