eu.project.ttc.resources.ReferenceTermList.java Source code

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/*******************************************************************************
 * Copyright 2015-2016 - 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 eu.project.ttc.resources;

import java.io.IOException;
import java.io.InputStream;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Scanner;

import org.apache.commons.io.IOUtils;
import org.apache.uima.resource.DataResource;
import org.apache.uima.resource.ResourceInitializationException;
import org.apache.uima.resource.SharedResourceObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.common.base.Objects;
import com.google.common.base.Optional;
import com.google.common.base.Splitter;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;

import eu.project.ttc.utils.TermSuiteConstants;

public class ReferenceTermList implements SharedResourceObject {
    private static final Logger LOGGER = LoggerFactory.getLogger(ReferenceTermList.class);

    private String path;

    public static class RTLTerm {
        private int id;
        private int line;
        private String string;
        private boolean variant;

        private Optional<RTLTerm> baseTerm = Optional.absent();
        private List<RTLTerm> variants = Lists.newArrayList();

        public RTLTerm(int line, int id, String string, boolean variant) {
            super();
            this.line = line;
            this.id = id;
            this.string = string;
            this.variant = variant;
        }

        void addVariant(RTLTerm variant) {
            this.variants.add(variant);
            if (variant.baseTerm.isPresent() && variant.baseTerm.get() != this)
                LOGGER.warn(
                        "Cannot set base term {}:{} to variant term {}:{} (already has another base term {}:{})",
                        id, string, variant.id, variant.string, variant.baseTerm.get().id,
                        variant.baseTerm.get().string);
            else
                variant.baseTerm = Optional.of(this);
        }

        public RTLTerm getBaseTerm() {
            return baseTerm.get();
        }

        public boolean hashBaseTerm() {
            return baseTerm.isPresent();
        }

        public int getId() {
            return id;
        }

        public String getString() {
            return string;
        }

        public boolean isVariant() {
            return variant;
        }

        public List<RTLTerm> getVariants() {
            return ImmutableList.copyOf(variants);
        }

        @Override
        public String toString() {
            return String.format("%s%s:%s (l: %d)", isVariant() ? "V" : "T", id, string, line);
        }

        public String toTSVString() {
            return String.format("%s\t%s\t%s", id, isVariant() ? "V" : "T", string);
        }

        @Override
        public int hashCode() {
            return Objects.hashCode(string);
        }

        @Override
        public boolean equals(Object obj) {
            if (obj instanceof RTLTerm)
                return Objects.equal(string, ((RTLTerm) obj).string);
            return false;
        }

        public String toStringWithVar() {
            return String.format("%s (%s)", string, isVariant() ? "V" : "T");
        }

    }

    private Map<Integer, RTLTerm> bases = Maps.newHashMap();

    private int lineNb = 0;

    @Override
    public void load(DataResource data) throws ResourceInitializationException {
        InputStream inputStream = null;
        try {
            this.path = data.getUri().toString();
            LOGGER.debug("Loading reference term list at {}", this.path);
            inputStream = data.getInputStream();
            Scanner scanner = null;
            try {
                scanner = new Scanner(inputStream);
                scanner.useDelimiter(TermSuiteConstants.LINE_BREAK);
                while (scanner.hasNext()) {
                    lineNb++;
                    String line = scanner.next().split(TermSuiteConstants.DIESE)[0].trim();
                    List<String> els = Splitter.on(TermSuiteConstants.TAB).splitToList(line.trim().toLowerCase());
                    if (!els.isEmpty()) {
                        if (els.size() != 3)
                            LOGGER.warn("Ignoring line {} : should have exactly 3 elements ({})", lineNb, line);
                        else {
                            int id = Integer.parseInt(els.get(0));
                            RTLTerm refTerm = new RTLTerm(lineNb, id, els.get(2),
                                    els.get(1).toLowerCase().equals("v"));
                            if (refTerm.isVariant()) {
                                if (!bases.containsKey(id)) {
                                    LOGGER.warn("No such base term id {} for variant term {}", id, refTerm);
                                    continue;
                                } else
                                    bases.get(id).addVariant(refTerm);
                            } else {
                                bases.put(id, refTerm);
                            }
                        }
                    }
                }
                this.bases = ImmutableMap.copyOf(this.bases);
                int total = 0;
                for (RTLTerm ref : bases.values())
                    total += 1 + ref.getVariants().size();
                LOGGER.debug("Reference term list loaded (nb terms: {}, nb terms and variants: {})",
                        this.bases.keySet().size(), total);
            } catch (Exception e) {
                e.printStackTrace();
                throw new ResourceInitializationException(e);
            } finally {
                IOUtils.closeQuietly(scanner);
            }
        } catch (IOException e) {
            LOGGER.error("Could not load file {}", data.getUrl());
            throw new ResourceInitializationException(e);
        } finally {
            IOUtils.closeQuietly(inputStream);
        }
    }

    public Collection<RTLTerm> getTerms() {
        return bases.values();
    }

    public String getPath() {
        return path;
    }

    public List<RTLTerm> asList() {
        return ImmutableList.copyOf(bases.values());
    }
}