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/* This file is part of the OWL API.
 * The contents of this file are subject to the LGPL License, Version 3.0.
 * Copyright 2014, The University of Manchester
 * 
 * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License along with this program.  If not, see http://www.gnu.org/licenses/.
 *
 * Alternatively, the contents of this file may be used under the terms of the Apache License, Version 2.0 in which case, the provisions of the Apache License Version 2.0 are applicable instead of those above.
 * Licensed 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.semanticweb.owlapi.io;

import static org.semanticweb.owlapi.util.OWLAPIPreconditions.checkNotNull;

import java.io.Serializable;
import java.util.HashSet;
import java.util.Set;

import javax.annotation.Nonnull;

import org.semanticweb.owlapi.model.IRI;
import org.semanticweb.owlapi.util.CollectionFactory;

import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.Multimap;
import com.google.common.collect.Multimaps;

/**
 * @author Matthew Horridge, The University of Manchester, Bio-Health
 *         Informatics Group
 * @since 3.2
 */
public class RDFParserMetaData implements OWLOntologyLoaderMetaData, Serializable {

    private static final long serialVersionUID = 40000L;
    private final int tripleCount;
    private final RDFOntologyHeaderStatus headerStatus;
    private final Set unparsedTriples;
    private final transient ArrayListMultimap> guessedDeclarations;

    /**
     * @param headerStatus
     *        the header status
     * @param tripleCount
     *        the triple count
     * @param unparsedTriples
     *        the set of triples not parsed
     * @param guessedDeclarations
     *        guessed declarations map
     */
    public RDFParserMetaData(@Nonnull RDFOntologyHeaderStatus headerStatus, int tripleCount,
        @Nonnull Set unparsedTriples, @Nonnull ArrayListMultimap> guessedDeclarations) {
        this.tripleCount = tripleCount;
        this.headerStatus = checkNotNull(headerStatus, "headerStatus cannot be null");
        this.unparsedTriples = checkNotNull(unparsedTriples, "unparsedTriples cannot be null");
        this.guessedDeclarations = checkNotNull(guessedDeclarations, "guessedDeclarations cannot be null");
    }

    /** Empty construcotr for empty metadata. */
    public RDFParserMetaData() {
        tripleCount = 0;
        headerStatus = RDFOntologyHeaderStatus.PARSED_ZERO_HEADERS;
        unparsedTriples = new HashSet<>();
        guessedDeclarations = null;
    }

    /**
     * Gets a count of the triples process during loading.
     * 
     * @return The number of triples process during loading.
     */
    public int getTripleCount() {
        return tripleCount;
    }

    /** @return the header status */
    public RDFOntologyHeaderStatus getHeaderState() {
        return headerStatus;
    }

    /** @return the set of unparsed triples, as a copy */
    public Set getUnparsedTriples() {
        return CollectionFactory.getCopyOnRequestSetFromMutableCollection(unparsedTriples);
    }

    /**
     * @return the guessed declarations, i.e., those not parsed from explicit
     *         declaration axioms
     */
    public Multimap> getGuessedDeclarations() {
        if (guessedDeclarations == null) {
            return ArrayListMultimap.create();
        }
        return Multimaps.unmodifiableMultimap(guessedDeclarations);
    }
}