Machine Learning in Java - Second Edition

Restoring a model

Restoring a model saved through serialization is simply an inverse operation using the ObjectInputStream class:

String modelPath = "myTopicModel"; 
 
//Load model 
ObjectInputStream ois = new ObjectInputStream( 
  new FileInputStream (new File(modelPath+".model"))); 
ParallelTopicModel model = (ParallelTopicModel) ois.readObject(); 
ois.close();    
 
// Load pipeline 
ois = new ObjectInputStream( 
  new FileInputStream (new File(modelPath+".pipeline"))); 
SerialPipes pipeline = (SerialPipes) ois.readObject(); 
ois.close();    

We discussed how to build an LDA model to automatically classify documents into topics. In the next example, we'll look into another text mining problem—text classification.