opennlp.tools.parser.ParserChunkerSequenceValidator 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.parser;
import java.util.HashMap;
import java.util.Map;
import opennlp.tools.parser.chunking.Parser;
import opennlp.tools.util.SequenceValidator;
import opennlp.tools.util.TokenTag;
/**
* The parser chunker {@link SequenceValidator} implementation.
*/
public class ParserChunkerSequenceValidator implements SequenceValidator {
private final Map continueStartMap;
public ParserChunkerSequenceValidator(String[] outcomes) {
continueStartMap = new HashMap<>(outcomes.length);
for (String outcome : outcomes) {
if (outcome.startsWith(Parser.CONT)) {
continueStartMap.put(outcome, Parser.START + outcome.substring(
Parser.CONT.length()));
}
}
}
public boolean validSequence(int i, String[] inputSequence,
String[] tagList, String outcome) {
if (continueStartMap.containsKey(outcome)) {
int lti = tagList.length - 1;
if (lti == -1) {
return false;
}
else {
String lastTag = tagList[lti];
if (lastTag.equals(outcome)) {
return true;
}
if (lastTag.equals(continueStartMap.get(outcome))) {
return true;
}
if (lastTag.equals(Parser.OTHER)) {
return false;
}
return false;
}
}
return true;
}
@Override
public boolean validSequence(int i, TokenTag[] inputTuples, String[] outcomesSequence, String outcome) {
String[] inputSequence = TokenTag.extractTokens(inputTuples);
return validSequence(i, inputSequence, outcomesSequence, outcome);
}
}