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GH-4622 change approach to writing the validation exception to more a…
…lign with how RDF data is typically transmitted over HTTP
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97 changes: 97 additions & 0 deletions
97
...ain/java/org/eclipse/rdf4j/http/server/repository/statements/ValidationExceptionView.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,97 @@ | ||
| /******************************************************************************* | ||
| * Copyright (c) 2015 Eclipse RDF4J contributors, Aduna, and others. | ||
| * | ||
| * 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.http.server.repository.statements; | ||
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| import java.io.ByteArrayOutputStream; | ||
| import java.io.OutputStream; | ||
| import java.nio.charset.Charset; | ||
| import java.util.Map; | ||
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| import javax.servlet.http.HttpServletRequest; | ||
| import javax.servlet.http.HttpServletResponse; | ||
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| import org.eclipse.rdf4j.common.exception.ValidationException; | ||
| import org.eclipse.rdf4j.common.webapp.views.SimpleResponseView; | ||
| import org.eclipse.rdf4j.model.Model; | ||
| import org.eclipse.rdf4j.model.Namespace; | ||
| import org.eclipse.rdf4j.model.Statement; | ||
| import org.eclipse.rdf4j.rio.RDFFormat; | ||
| import org.eclipse.rdf4j.rio.RDFWriter; | ||
| import org.eclipse.rdf4j.rio.RDFWriterFactory; | ||
| import org.springframework.web.servlet.View; | ||
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| /** | ||
| * View used to export a ValidationException. | ||
| * | ||
| * @author Håvard Ottestad | ||
| */ | ||
| public class ValidationExceptionView implements View { | ||
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| public static final String FACTORY_KEY = "factory"; | ||
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| public static final String VALIDATION_EXCEPTION = "validationException"; | ||
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| private static final ValidationExceptionView INSTANCE = new ValidationExceptionView(); | ||
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| public static ValidationExceptionView getInstance() { | ||
| return INSTANCE; | ||
| } | ||
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| private ValidationExceptionView() { | ||
| } | ||
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| @Override | ||
| public String getContentType() { | ||
| return null; | ||
| } | ||
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| @SuppressWarnings("rawtypes") | ||
| @Override | ||
| public void render(Map model, HttpServletRequest request, HttpServletResponse response) throws Exception { | ||
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| RDFWriterFactory rdfWriterFactory = (RDFWriterFactory) model.get(FACTORY_KEY); | ||
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| RDFFormat rdfFormat = rdfWriterFactory.getRDFFormat(); | ||
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| try (ByteArrayOutputStream baos = new ByteArrayOutputStream()) { | ||
| RDFWriter rdfWriter = rdfWriterFactory.getWriter(baos); | ||
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| ValidationException validationException = (ValidationException) model.get(VALIDATION_EXCEPTION); | ||
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| Model validationReportModel = validationException.validationReportAsModel(); | ||
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| rdfWriter.startRDF(); | ||
| for (Namespace namespace : validationReportModel.getNamespaces()) { | ||
| rdfWriter.handleNamespace(namespace.getPrefix(), namespace.getName()); | ||
| } | ||
| for (Statement statement : validationReportModel) { | ||
| rdfWriter.handleStatement(statement); | ||
| } | ||
| rdfWriter.endRDF(); | ||
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| try (OutputStream out = response.getOutputStream()) { | ||
| response.setStatus((int) model.get(SimpleResponseView.SC_KEY)); | ||
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| String mimeType = rdfFormat.getDefaultMIMEType(); | ||
| if (rdfFormat.hasCharset()) { | ||
| Charset charset = rdfFormat.getCharset(); | ||
| mimeType += "; charset=" + charset.name(); | ||
| } | ||
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| assert mimeType.startsWith("application/"); | ||
| response.setContentType("application/shacl-validation-report+" + mimeType.replace("application/", "")); | ||
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| out.write(baos.toByteArray()); | ||
| } | ||
| } | ||
| } | ||
|
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| } |
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