/*
* 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 org.apache.uima.ruta.seed;
import java.io.BufferedReader;
import java.io.StringReader;
import java.util.Collection;
import java.util.LinkedList;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.uima.cas.CAS;
import org.apache.uima.cas.CASException;
import org.apache.uima.cas.FSIterator;
import org.apache.uima.cas.Type;
import org.apache.uima.cas.text.AnnotationFS;
import org.apache.uima.jcas.JCas;
import org.apache.uima.ruta.type.MARKUP;
import org.apache.uima.ruta.type.TokenSeed;
public class DefaultSeeder implements RutaAnnotationSeeder {
public static final String seedType = "org.apache.uima.ruta.type.TokenSeed";
private final Pattern markupPattern = Pattern
.compile("</?\\w+((\\s+\\w+(\\s*=\\s*(?:\".*?\"|'.*?'|[^'\">\\s]+))?)+\\s*|\\s*)/?>");
public Type seed(String text, CAS cas) {
Type result = null;
JCas jCas = null;
int size = 0;
try {
jCas = cas.getJCas();
size = jCas.getAnnotationIndex(TokenSeed.type).size();
result = jCas.getTypeSystem().getType(seedType);
} catch (CASException e1) {
}
// do not apply seeding if there are already annotations of this seed type
if (jCas == null || size != 0 || text == null) {
return result;
}
BufferedReader reader = new BufferedReader(new StringReader(text));
final SeedLexer sourceLexer = new SeedLexer(reader);
sourceLexer.setJCas(jCas);
AnnotationFS a = null;
try {
a = sourceLexer.yylex();
} catch (Exception e) {
}
while (a != null) {
cas.addFsToIndexes(a);
try {
a = sourceLexer.yylex();
} catch (Exception e) {
}
}
// FIXME: lexer rules for html markup won't work. Therrfore, those rules where removed in the
// grammar and the functionality is included directly with regexp
Matcher matcher = markupPattern.matcher(text);
Collection<AnnotationFS> toRemove = new LinkedList<AnnotationFS>();
while (matcher.find()) {
int begin = matcher.start();
int end = matcher.end();
MARKUP markup = new MARKUP(jCas, begin, end);
markup.addToIndexes();
FSIterator<AnnotationFS> subiterator = cas.getAnnotationIndex(result).subiterator(markup);
while (subiterator.isValid()) {
AnnotationFS fs = subiterator.get();
toRemove.add(fs);
subiterator.moveToNext();
}
}
for (AnnotationFS each : toRemove) {
cas.removeFsFromIndexes(each);
}
return result;
}
}