us.askplatyp.kb.lucene.wikidata.mapping.ISSNStatementMapper.java Source code

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Here is the source code for us.askplatyp.kb.lucene.wikidata.mapping.ISSNStatementMapper.java

Source

/*
 * Copyright (c) 2017 Platypus Knowledge Base developers.
 *
 * 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 2 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/>.
 */

package us.askplatyp.kb.lucene.wikidata.mapping;

import org.apache.commons.validator.routines.ISSNValidator;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.wikidata.wdtk.datamodel.interfaces.StringValue;

import java.util.stream.Stream;

/**
 * @author Thomas Pellissier Tanon
 */
class ISSNStatementMapper implements StatementMainStringValueMapper {

    @Override
    public Stream<Field> mapMainStringValue(StringValue value) throws InvalidWikibaseValueException {
        String ISSN = (String) ISSNValidator.getInstance().validate(value.getString());
        if (ISSN == null) {
            return Stream.empty();
        }
        return Stream.of(new StringField("issn", ISSN, Field.Store.YES));
    }
}