/*
* 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;
import opennlp.model.AbstractEventStream;
import opennlp.model.Event;
import opennlp.model.EventStream;
import opennlp.model.RealValueFileEventStream;
public class RealBasicEventStream extends AbstractEventStream {
ContextGenerator cg = new BasicContextGenerator();
DataStream ds;
Event next;
public RealBasicEventStream(DataStream ds) {
this.ds = ds;
if (this.ds.hasNext())
next = createEvent((String)this.ds.nextToken());
}
public Event next() {
while (next == null && this.ds.hasNext())
next = createEvent((String)this.ds.nextToken());
Event current = next;
if (this.ds.hasNext()) {
next = createEvent((String)this.ds.nextToken());
}
else {
next = null;
}
return current;
}
public boolean hasNext() {
while (next == null && ds.hasNext())
next = createEvent((String)ds.nextToken());
return next != null;
}
private Event createEvent(String obs) {
int lastSpace = obs.lastIndexOf(' ');
if (lastSpace == -1)
return null;
else {
String[] contexts = obs.substring(0,lastSpace).split("\\s+");
float[] values = RealValueFileEventStream.parseContexts(contexts);
return new Event(obs.substring(lastSpace+1),contexts,values);
}
}
public static void main(String[] args) throws java.io.IOException {
EventStream es = new RealBasicEventStream(new PlainTextByLineDataStream(new java.io.FileReader(args[0])));
while (es.hasNext()) {
System.out.println(es.next());
}
}
}