package be.ugent.mmlab.rml.function; import java.io.IOException; import java.util.ArrayList; import java.util.List; import javax.xml.parsers.ParserConfigurationException; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.opengis.referencing.FactoryException; import org.xml.sax.SAXException; import be.ugent.mmlab.rml.core.MalformedGeometryException; import be.ugent.mmlab.rml.vocabulary.Vocab.QLTerm; public class FunctionSubtract extends AbstractFunction implements Function { private final static Logger log = LoggerFactory.getLogger(FunctionSubtract.class); @Override public List<? extends Object> execute(List<? extends Object> arguments, List<? extends QLTerm> qlterms) throws SAXException, IOException, ParserConfigurationException, FactoryException, MalformedGeometryException { List<String> valueList = new ArrayList<>(); log.debug("Executing FunctionSubtract..."); if (log.isTraceEnabled()) { log.trace("FunctionSubtract: value0: " + arguments.get(0)); log.trace("FunctionSubtract: value1: " + arguments.get(1)); } String result = String .valueOf(Double.valueOf(arguments.get(0).toString()) - Double.valueOf(arguments.get(1).toString())); valueList.add(result); log.trace("FunctionSubtract: Result: " + result); return valueList; } @Override public Object execute(Object argument, QLTerm qlterm) throws SAXException, IOException, ParserConfigurationException, FactoryException,MalformedGeometryException { return null; } }