VoidConstraintComponent.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.List;
import java.util.Set;

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.sail.shacl.SourceConstraintComponent;
import org.eclipse.rdf4j.sail.shacl.ValidationSettings;
import org.eclipse.rdf4j.sail.shacl.ast.StatementMatcher;
import org.eclipse.rdf4j.sail.shacl.ast.ValidationApproach;
import org.eclipse.rdf4j.sail.shacl.ast.planNodes.EmptyNode;
import org.eclipse.rdf4j.sail.shacl.ast.planNodes.PlanNode;
import org.eclipse.rdf4j.sail.shacl.ast.planNodes.PlanNodeProvider;
import org.eclipse.rdf4j.sail.shacl.wrapper.data.ConnectionsGroup;

/**
 * The AST (Abstract Syntax Tree) node that is used when a sh:PropertyShape has no constraints.
 */
public class VoidConstraintComponent extends AbstractConstraintComponent {

	public VoidConstraintComponent() {

	}

	@Override
	public void toModel(Resource subject, IRI predicate, Model model, Set<Resource> cycleDetection) {
	}

	@Override
	public SourceConstraintComponent getConstraintComponent() {
		return null;
	}

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

	@Override
	public PlanNode generateTransactionalValidationPlan(ConnectionsGroup connectionsGroup,
			ValidationSettings validationSettings,
			PlanNodeProvider overrideTargetNode, Scope scope) {
		return EmptyNode.getInstance();
	}

	@Override
	public PlanNode getAllTargetsPlan(ConnectionsGroup connectionsGroup, Resource[] dataGraph, Scope scope,
			StatementMatcher.StableRandomVariableProvider stableRandomVariableProvider,
			ValidationSettings validationSettings) {
		return EmptyNode.getInstance();
	}

	@Override
	public boolean requiresEvaluation(ConnectionsGroup connectionsGroup, Scope scope, Resource[] dataGraph,
			StatementMatcher.StableRandomVariableProvider stableRandomVariableProvider) {
		return false;
	}

	@Override
	public ValidationApproach getOptimalBulkValidationApproach() {
		return ValidationApproach.Transactional;
	}

	@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;
		}

		return super.equals(o);
	}

	@Override
	public int hashCode() {
		return super.hashCode();
	}
}