| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.jena.shacl.sys; |
| |
| import org.apache.jena.graph.Graph; |
| import org.apache.jena.graph.TransactionHandler; |
| import org.apache.jena.graph.impl.TransactionHandlerBase; |
| import org.apache.jena.shacl.*; |
| import org.apache.jena.shacl.validation.ValidationProc; |
| import org.apache.jena.sparql.graph.GraphWrapper; |
| |
| /** A graph that performs SHACL validation on a graph during transaction "commit". |
| * (It does not validate on direct addition of date to the graph outside a transaction). |
| * Usage: |
| * <pre> |
| * try { |
| * graph.getTransactionHandler().execute(()->{ |
| * ... application code ... |
| * }); |
| * } catch (ShaclValidationException ex) { |
| * ShLib.printReport(ex.getReport()); |
| * } |
| * </pre> |
| * If validation fails, the transaction is aborted. |
| * |
| * <em>Experimental</em> |
| */ |
| public class ValidationGraph extends GraphWrapper { |
| private final Shapes shapes; |
| private final TransactionHandlerValidate transactionHandler; |
| |
| public ValidationGraph(Graph graph, Shapes shapes) { |
| super(graph); |
| this.shapes = shapes; |
| this.transactionHandler = new TransactionHandlerValidate(this, get().getTransactionHandler()); |
| } |
| |
| @Override |
| public TransactionHandler getTransactionHandler() { |
| return transactionHandler; |
| } |
| |
| /** |
| * Update the graph and return a validation report. This operation aborts the |
| * update if there are any validation results from shapes (any severity). |
| * To determine if the update resulted in a graph that validates, |
| * call {@code ValidationReport.conforms}. |
| */ |
| public ValidationReport updateValidateReport(Runnable action) { |
| return GraphValidation.updateAndReport(shapes, get(), action); |
| } |
| |
| /** |
| * Update the graph. This operation aborts and throws a |
| * {@link ShaclValidationException} if there are any validation results from |
| * shapes (of any severity). If the update results in a valid graph, return |
| * without exception (with a {@link ValidationReport} with |
| * {@code ValidationReport.conforms} returning true). |
| */ |
| public ValidationReport updateValidate(Runnable action) throws ShaclValidationException { |
| return GraphValidation.update(shapes, get(), action); |
| } |
| |
| /** |
| * Update the graph and return a validation report. |
| * This operation only reports, it does cancel the update |
| * if there are any validation results from shapes. |
| */ |
| public ValidationReport updateAndReport(Runnable action) { |
| TransactionHandler superTH = get().getTransactionHandler(); |
| if ( superTH.transactionsSupported() ) { |
| superTH.execute(action); |
| } else { |
| action.run(); |
| } |
| return ShaclValidator.get().validate(shapes, get()); |
| } |
| |
| private static class TransactionHandlerValidate extends TransactionHandlerBase { |
| |
| private final TransactionHandler other; |
| private ValidationGraph graphValidate; |
| |
| TransactionHandlerValidate(ValidationGraph graphValidate, TransactionHandler other) { |
| this.graphValidate = graphValidate; |
| this.other = other ; |
| } |
| |
| @Override |
| public boolean transactionsSupported() { |
| return other.transactionsSupported(); |
| } |
| |
| @Override |
| public void begin() { |
| other.begin(); |
| } |
| |
| @Override |
| public void abort() { |
| other.abort(); |
| } |
| |
| @Override |
| public void commit() { |
| ValidationReport report = validateCommit(); |
| throw new ShaclValidationException(report) { |
| @Override |
| public Throwable fillInStackTrace() { return this; } |
| }; |
| } |
| |
| // Execute. If there are any validation results of any severity, abort, and return the ValidationReport. |
| private ValidationReport validateCommit() { |
| ValidationReport report = ValidationProc.simpleValidation(graphValidate.shapes, graphValidate.get(), false); |
| if ( report.conforms() ) { |
| other.commit(); |
| return null; |
| } |
| abort(); |
| return report; |
| } |
| } |
| } |
| |