| /* |
| * 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; |
| import opennlp.tools.util.TokenTag; |
| |
| public class DefaultChunkerSequenceValidator implements SequenceValidator<TokenTag> { |
| |
| private boolean validOutcome(String outcome, String prevOutcome) { |
| if (outcome.startsWith("I-")) { |
| if (prevOutcome == null) { |
| return false; |
| } |
| else { |
| if (prevOutcome.equals("O")) { |
| return false; |
| } |
| return prevOutcome.substring(2).equals(outcome.substring(2)); |
| } |
| } |
| 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, TokenTag[] sequence, String[] s, String outcome) { |
| return validOutcome(outcome, s); |
| } |
| |
| } |