InConstraintComponent.java

/*******************************************************************************
 * Copyright (c) 2020 Eclipse RDF4J contributors.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Distribution License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: BSD-3-Clause
 *******************************************************************************/

package org.eclipse.rdf4j.sail.shacl.ast.constraintcomponents;

import java.util.Collections;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
import java.util.function.Function;

import org.eclipse.rdf4j.model.IRI;
import org.eclipse.rdf4j.model.Literal;
import org.eclipse.rdf4j.model.Model;
import org.eclipse.rdf4j.model.Resource;
import org.eclipse.rdf4j.model.Value;
import org.eclipse.rdf4j.model.vocabulary.SHACL;
import org.eclipse.rdf4j.sail.shacl.SourceConstraintComponent;
import org.eclipse.rdf4j.sail.shacl.ast.ShaclAstLists;
import org.eclipse.rdf4j.sail.shacl.ast.StatementMatcher.Variable;
import org.eclipse.rdf4j.sail.shacl.ast.planNodes.FilterPlanNode;
import org.eclipse.rdf4j.sail.shacl.ast.planNodes.PlanNode;
import org.eclipse.rdf4j.sail.shacl.ast.planNodes.ValueInFilter;
import org.eclipse.rdf4j.sail.shacl.wrapper.data.ConnectionsGroup;
import org.eclipse.rdf4j.sail.shacl.wrapper.shape.ShapeSource;

public class InConstraintComponent extends AbstractSimpleConstraintComponent {

	private final Set<Value> in;

	public InConstraintComponent(ShapeSource shapeSource, Resource in) {
		super(in);
		this.in = Collections.unmodifiableSet(new LinkedHashSet<>(ShaclAstLists.toList(shapeSource, in, Value.class)));
	}

	public InConstraintComponent(InConstraintComponent inConstraintComponent) {
		super(inConstraintComponent.getId());
		in = inConstraintComponent.in;
	}

	@Override
	public void toModel(Resource subject, IRI predicate, Model model, Set<Resource> cycleDetection) {
		model.add(subject, SHACL.IN, getId());

		if (!model.contains(getId(), null, null)) {
			ShaclAstLists.listToRdf(in, getId(), model);
		}
	}

	@Override
	public SourceConstraintComponent getConstraintComponent() {
		return SourceConstraintComponent.InConstraintComponent;
	}

	@Override
	public ConstraintComponent deepClone() {
		return new InConstraintComponent(this);
	}

	@Override
	String getSparqlFilterExpression(Variable<Value> variable, boolean negated) {
		if (negated) {
			return "" + variable.asSparqlVariable() + " IN (" + getInSetAsString() + ")";
		} else {
			return "" + variable.asSparqlVariable() + " NOT IN (" + getInSetAsString() + ")";
		}
	}

	private String getInSetAsString() {
		return in.stream()
				.map(targetNode -> {
					if (targetNode.isResource()) {
						return "<" + targetNode + ">";
					}
					if (targetNode.isLiteral()) {
						IRI datatype = ((Literal) targetNode).getDatatype();
						if (datatype == null) {
							return "\"" + targetNode.stringValue() + "\"";
						}
						if (((Literal) targetNode).getLanguage().isPresent()) {
							return "\"" + targetNode.stringValue() + "\"@" + ((Literal) targetNode).getLanguage().get();
						}
						return "\"" + targetNode.stringValue() + "\"^^<" + datatype.stringValue() + ">";
					}

					throw new IllegalStateException(targetNode.getClass().getSimpleName());

				})
				.reduce((a, b) -> a + ", " + b)
				.orElse("");
	}

	@Override
	Function<PlanNode, FilterPlanNode> getFilterAttacher(ConnectionsGroup connectionsGroup) {
		return (parent) -> new ValueInFilter(parent, in, connectionsGroup);
	}

	@Override
	public List<Literal> getDefaultMessage() {
		return List.of();
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) {
			return true;
		}
		if (o == null || getClass() != o.getClass()) {
			return false;
		}

		InConstraintComponent that = (InConstraintComponent) o;

		return in.equals(that.in);
	}

	@Override
	public int hashCode() {
		return in.hashCode() + "InConstraintComponent".hashCode();
	}
}