/* Copyright (C) 2002 Univ. of Massachusetts Amherst, Computer Science Dept.
This file is part of "MALLET" (MAchine Learning for LanguagE Toolkit).
http://www.cs.umass.edu/~mccallum/mallet
This software is provided under the terms of the Common Public License,
version 1.0, as published by http://www.opensource.org. For further
information, see the file `LICENSE' included with this distribution. */
/**
@author Andrew McCallum <a href="mailto:mccallum@cs.umass.edu">mccallum@cs.umass.edu</a>
*/
package cc.mallet.pipe.iterator;
import java.util.Iterator;
import cc.mallet.pipe.Pipe;
import cc.mallet.types.Alphabet;
import cc.mallet.types.Instance;
import cc.mallet.types.Label;
/**
* Interface for classes that generate instances.
*
* Typically, these instances will be unprocessed (e.g., they
* may come from a corpus data file), and are passed through a pipe
* as they are added to an InstanceList.
*
* @see Pipe
* @see cc.mallet.types.InstanceList
*
*/
@Deprecated // You should just use Iterator<Instance> directly. This class will be removed in the future.
public abstract class PipeInputIterator implements Iterator<Instance>
{
public abstract Instance next ();
public abstract boolean hasNext ();
public void remove () { throw new UnsupportedOperationException (); }
// Sometimes (as in an InstanceList used for AdaBoost) Instances may be weighted.
// Weights may also come from other raw input sources for instances in Pipes.
public double getWeight () { return 1.0; }
}