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The RMLMapper executes RML rules to generate high quality Linked Data from multiple originally (semi-)structured data sources.

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package be.ugent.rml;

import be.ugent.rml.extractor.ConstantExtractor;
import be.ugent.rml.extractor.ReferenceExtractor;
import be.ugent.rml.functions.ConcatFunction;
import be.ugent.rml.functions.SingleRecordFunctionExecutor;
import be.ugent.rml.store.QuadStore;
import be.ugent.rml.term.NamedNode;
import be.ugent.rml.term.Term;

import java.util.List;

public class RecordFunctionExecutorFactory {

    public static SingleRecordFunctionExecutor generate(QuadStore store, Term termMap, boolean encodeURI, boolean ignoreDoubleQuotes) {
        List references = Utils.getObjectsFromQuads(store.getQuads(termMap, new NamedNode(NAMESPACES.RML2 + "reference"), null));
        List templates = Utils.getObjectsFromQuads(store.getQuads(termMap, new NamedNode(NAMESPACES.RML2 + "template"), null));
        List constants = Utils.getObjectsFromQuads(store.getQuads(termMap, new NamedNode(NAMESPACES.RML2 + "constant"), null));

        if (!references.isEmpty()) {
            return new ReferenceExtractor(references.get(0).getValue(), ignoreDoubleQuotes);
        } else if (!templates.isEmpty()) {
            return new ConcatFunction(Utils.parseTemplate(templates.get(0).getValue(), ignoreDoubleQuotes), encodeURI);
        } else if (!constants.isEmpty()) {
            return new ConstantExtractor(constants.get(0).getValue());
        } else {
            return null;
        }
    }
}