/*
* 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;
import java.io.IOException;
import opennlp.tools.ml.model.Event;
import opennlp.tools.ml.model.RealValueFileEventStream;
import opennlp.tools.util.ObjectStream;
public class RealBasicEventStream implements ObjectStream<Event> {
ContextGenerator cg = new BasicContextGenerator();
ObjectStream<String> ds;
public RealBasicEventStream(ObjectStream<String> ds) {
this.ds = ds;
}
public Event read() throws IOException {
String eventString = ds.read();
if (eventString != null) {
return createEvent(eventString);
}
return 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);
}
}
@Override
public void reset() throws IOException, UnsupportedOperationException {
ds.reset();
}
@Override
public void close() throws IOException {
ds.close();
}
}