opennlp.tools.chunker.DefaultChunkerSequenceValidator Maven / Gradle / Ivy
/*
* 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.chunker;
import opennlp.tools.util.SequenceValidator;
public class DefaultChunkerSequenceValidator implements SequenceValidator{
private boolean validOutcome(String outcome, String prevOutcome) {
if (outcome.startsWith("I-")) {
if (prevOutcome == null) {
return (false);
}
else {
if (prevOutcome.equals("O")) {
return (false);
}
if (!prevOutcome.substring(2).equals(outcome.substring(2))) {
return (false);
}
}
}
return true;
}
protected boolean validOutcome(String outcome, String[] sequence) {
String prevOutcome = null;
if (sequence.length > 0) {
prevOutcome = sequence[sequence.length-1];
}
return validOutcome(outcome,prevOutcome);
}
public boolean validSequence(int i, String[] sequence, String[] s, String outcome) {
return validOutcome(outcome, s);
}
}