fr.univnantes.lina.uima.tkregex.ae.RegexListResource.java Source code

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/*******************************************************************************
 * Copyright 2015 - CNRS (Centre National de Recherche Scientifique)
 *
 * 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 fr.univnantes.lina.uima.tkregex.ae;

import java.io.IOException;
import java.util.Collections;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.List;
import java.util.Set;

import org.antlr.v4.runtime.ANTLRInputStream;
import org.antlr.v4.runtime.CommonTokenStream;
import org.antlr.v4.runtime.tree.ParseTreeWalker;
import org.apache.uima.UIMAFramework;
import org.apache.uima.jcas.tcas.Annotation;
import org.apache.uima.resource.DataResource;
import org.apache.uima.resource.ResourceInitializationException;
import org.apache.uima.resource.SharedResourceObject;
import org.apache.uima.resource.metadata.TypeDescription;
import org.apache.uima.util.Level;

import com.google.common.base.Joiner;

import fr.univnantes.lina.uima.tkregex.Rule;
import fr.univnantes.lina.uima.tkregex.antlr.AutomataParserListener;
import fr.univnantes.lina.uima.tkregex.antlr.generated.UimaTokenRegexLexer;
import fr.univnantes.lina.uima.tkregex.antlr.generated.UimaTokenRegexParser;

public class RegexListResource implements SharedResourceObject {

    public static final String KEY_TOKEN_REGEX_RULES = "TokenRegexRules";
    private AutomataParserListener listener;

    @Override
    public void load(DataResource aData) throws ResourceInitializationException {
        ANTLRInputStream input;
        try {
            UIMAFramework.getLogger().log(Level.FINE,
                    "Loading resource " + KEY_TOKEN_REGEX_RULES + " at: " + aData.getUri());

            input = new ANTLRInputStream(aData.getInputStream());
            UimaTokenRegexLexer lexer = new UimaTokenRegexLexer(input);
            CommonTokenStream tokens = new CommonTokenStream(lexer);
            UimaTokenRegexParser parser = new UimaTokenRegexParser(tokens);
            listener = new AutomataParserListener(parser);
            listener.setAllowMatchingEmptySequences(false);
            ParseTreeWalker.DEFAULT.walk(listener, parser.ruleList());
        } catch (IOException e) {
            throw new ResourceInitializationException(e);
        }
    }

    public List<Rule> getRules() {
        return Collections.unmodifiableList(this.listener.getRules());
    }

    public TypeDescription getIteratedTypeDescription() {
        return this.listener.getIteraredType();
    }

    public String getMatchingLabelString(Annotation word) {
        List<String> matcherNames = new LinkedList<String>();
        Set<String> labels = new HashSet<String>();
        for (String matcherName : this.listener.getShortcutMatchers().keySet()) {
            if (listener.getShortcutMatchers().get(matcherName).match(word)) {
                matcherNames.add(matcherName);
                labels.add(listener.getShortcutMatchers().get(matcherName).getLabel());
            }
        }
        matcherNames.removeAll(labels);
        String otherLabelStr = matcherNames.isEmpty() ? "" : ("|" + Joiner.on(" ").join(matcherNames));
        return Joiner.on(" ").join(labels) + otherLabelStr;
    }

    public List<String> getMatchingLabels(Annotation word) {
        List<String> l = new LinkedList<String>();
        for (String matcherName : this.listener.getShortcutMatchers().keySet()) {
            if (listener.getShortcutMatchers().get(matcherName).match(word)) {
                l.add(matcherName + ">" + listener.getShortcutMatchers().get(matcherName).getLabel());
            }
        }
        return l;
    }
}