/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package opennlp.maxent.io;
import java.io.File;
import java.io.IOException;
import opennlp.maxent.quasinewton.QNModel;
import opennlp.model.AbstractModel;
import opennlp.model.AbstractModelReader;
import opennlp.model.Context;
import opennlp.model.DataReader;
public class QNModelReader extends AbstractModelReader {
public QNModelReader(DataReader dataReader) {
super(dataReader);
}
public QNModelReader(File file) throws IOException {
super(file);
}
@Override
public void checkModelType() throws IOException {
String modelType = readUTF();
if (!modelType.equals("QN"))
System.out.println("Error: attempting to load a " + modelType
+ " model as a MAXENT_QN model." + " You should expect problems.");
}
@Override
public AbstractModel constructModel() throws IOException {
String[] predNames = getPredicates();
String[] outcomeNames = getOutcomes();
Context[] params = getParameters();
double[] parameters = getDoubleArrayParams();
return new QNModel(predNames, outcomeNames, params, parameters);
}
private double[] getDoubleArrayParams() throws IOException {
int numDouble = readInt();
double[] doubleArray = new double[numDouble];
for (int i=0; i < numDouble; i++)
doubleArray[i] = readDouble();
return doubleArray;
}
private int[] getIntArrayParams() throws IOException {
int numInt = readInt();
int[] intArray = new int[numInt];
for (int i=0; i < numInt; i++)
intArray[i] = readInt();
return intArray;
}
protected Context[] getParameters() throws java.io.IOException {
int numContext = readInt();
Context[] params = new Context[numContext];
for (int i = 0; i < numContext; i++) {
int[] outcomePattern = getIntArrayParams();
double[] parameters = getDoubleArrayParams();
params[i] = new Context(outcomePattern, parameters);
}
return params;
}
}