/
QueryPrebinding.java
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/
QueryPrebinding.java
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package org.aksw.rdfunit.model.helper;
import com.google.common.collect.ImmutableSet;
import lombok.NonNull;
import lombok.Value;
import org.aksw.rdfunit.model.interfaces.shacl.ComponentParameter;
import org.aksw.rdfunit.model.interfaces.shacl.Shape;
import org.aksw.rdfunit.model.interfaces.shacl.ShapePath;
import org.apache.jena.query.ParameterizedSparqlString;
import org.apache.jena.rdf.model.RDFNode;
import org.apache.jena.sparql.ARQException;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* @author Dimitris Kontokostas
* @since 8/16/17
*/
@Value
public class QueryPrebinding {
@NonNull private final String sparqlQuery;
@NonNull private final Shape shape;
public String applyBindings(Map<ComponentParameter, RDFNode> bindings) {
String bindedQuery = shape.getPath()
.map(ShapePath::asSparqlPropertyPath)
.map(propertyPath -> sparqlQuery.replaceAll(Pattern.quote("$PATH"), Matcher.quoteReplacement(propertyPath)))
.orElse(sparqlQuery);
ParameterizedSparqlString query = new ParameterizedSparqlString(bindedQuery);
try {
for (Map.Entry<ComponentParameter, RDFNode> entry : bindings.entrySet()) {
// get same value or formatted based on query
RDFNode node = entry.getKey().getBindingValue(entry.getValue(), shape);
if (entry.getKey().isParameterForRawStringReplace()) {
String value = node.asLiteral().getLexicalForm();
query = new ParameterizedSparqlString(
query.toString().replaceAll(
Pattern.quote("$"+ entry.getKey().getParameterName()), Matcher.quoteReplacement(value)));
} else {
query.setParam(entry.getKey().getPredicate().getLocalName(), entry.getValue());
}
}
// FIXME add fixed bindings e.g. $shape etc
return query.toString().trim().replaceFirst("ASK", ""); // remove ASK...
} catch (ARQException e) {
// skip this exception
}
return bindedQuery;
}
public void validateSparqlQuery() {
String originalSparqlQueryUpperCase = sparqlQuery.toUpperCase();
if (
originalSparqlQueryUpperCase.contains("VALUES") ||
originalSparqlQueryUpperCase.contains("SERVICE") ||
originalSparqlQueryUpperCase.contains("MINUS")) {
throw new IllegalArgumentException("Pre-binding failed in query because of illegal constructs (VALUES, SERVICE, MINUS):\n" + sparqlQuery);
}
ImmutableSet<String> preboundVars = ImmutableSet.of("this", "shapesGraph", "currentShape", "value");
preboundVars.forEach(var -> {
if (sparqlQuery.matches("(?s).*[Aa][Ss]\\s+[\\?\\$]" + var + "\\W.*")) {
throw new IllegalArgumentException("Pre-binding failed in query because of use of pre-bind variable with AS:\n" + sparqlQuery);
}
});
}
}