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This Lutra submodule implements bOTTR (https://spec.ottr.xyz/bOTTR/0.1/). bOTTR is a mapping language for transforming data from relational databases, triplestores, CSV-files and other sources, into instances of templates. Lutra is the reference implementation of the OTTR framework. For more information about OTTR, see http://ottr.xyz.

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package xyz.ottr.lutra.bottr.source;

/*-
 * #%L
 * lutra-bottr
 * %%
 * Copyright (C) 2018 - 2019 University of Oslo
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 2.1 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 Lesser Public License for more details.
 * 
 * You should have received a copy of the GNU General Lesser Public
 * License along with this program.  If not, see
 * .
 * #L%
 */

import org.apache.jena.rdf.model.RDFNode;
import org.apache.jena.shared.PrefixMapping;
import xyz.ottr.lutra.bottr.model.ArgumentMap;
import xyz.ottr.lutra.bottr.util.Types;
import xyz.ottr.lutra.model.terms.Term;
import xyz.ottr.lutra.model.types.BasicType;
import xyz.ottr.lutra.model.types.Type;
import xyz.ottr.lutra.model.types.TypeRegistry;
import xyz.ottr.lutra.parser.TermParser;
import xyz.ottr.lutra.system.Result;
import xyz.ottr.lutra.wottr.parser.WTermParser;

public class RDFNodeArgumentMap extends ArgumentMap {

    private static final Type DEFAULT_TYPE = TypeRegistry.TOP;

    public RDFNodeArgumentMap(PrefixMapping prefixes, Type type) {
        super(prefixes, type);
    }

    public RDFNodeArgumentMap(PrefixMapping prefixes) {
        this(prefixes, DEFAULT_TYPE);
    }

    @Override
    protected String toString(RDFNode value) {
        return value != null && value.isLiteral()
            ? value.asLiteral().getLexicalForm()
            : super.toString(value);
    }

    @Override
    protected RDFNode toRDFNode(RDFNode value) {
        return value;
    }

    @Override
    protected Result getBasicTerm(RDFNode value, BasicType type) {

        if (this.literalLangTag != null) {
            return TermParser.toLangLiteralTerm(toString(value), this.literalLangTag)
                .map(t -> (Term)t);
        } else {
            Type valueType = Types.getIntrinsicType(value);
            return valueType.isCompatibleWith(type)
                ? WTermParser.toTerm(value)
                : super.toTerm(toString(value), type);
        }
    }

    @Override
    protected Result getListElementTerm(String value, BasicType type) {
        return super.toTerm(value, type);
    }
}