/*
* 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.tools.ml.maxent;
/**
* A interface for objects which can deliver a stream of training data to be
* supplied to an EventStream. It is not necessary to use a DataStream in a
* Maxent application, but it can be used to support a wider variety of formats
* in which your training data can be held.
*/
public interface DataStream {
/**
* Returns the next slice of data held in this DataStream.
*
* @return the Object representing the data which is next in this DataStream
*/
Object nextToken();
/**
* Test whether there are any Events remaining in this EventStream.
*
* @return true if this DataStream has more data tokens
*/
boolean hasNext();
}