Check for invalid encoding when loading Aspect Model files

core/esmf-aspect-meta-model-java/src/main/java/org/eclipse/esmf/aspectmodel/resolver/AspectModelFileLoader.java

@@ -15,23 +15,25 @@
 
 import static org.apache.commons.lang3.StringUtils.isBlank;
 
-import java.io.BufferedReader;
 import java.io.ByteArrayInputStream;
 import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.InputStreamReader;
 import java.net.MalformedURLException;
 import java.net.URI;
 import java.net.URISyntaxException;
 import java.net.URL;
+import java.nio.ByteBuffer;
+import java.nio.CharBuffer;
+import java.nio.charset.CharsetDecoder;
+import java.nio.charset.MalformedInputException;
 import java.nio.charset.StandardCharsets;
+import java.nio.charset.UnmappableCharacterException;
 import java.nio.file.Paths;
 import java.util.List;
 import java.util.Optional;
-import java.util.stream.Collectors;
 
 import org.eclipse.esmf.aspectmodel.AspectModelFile;
 import org.eclipse.esmf.aspectmodel.loader.AspectModelLoader;
@@ -53,6 +55,11 @@ public static RawAspectModelFile load( final File file ) {
       try {
          final RawAspectModelFile fromString = load( content( new FileInputStream( file ) ) );
          return new RawAspectModelFile( fromString.sourceModel(), fromString.headerComment(), Optional.of( file.toURI() ) );
+      } catch ( final ModelResolutionException exception ) {
+         if ( exception.getMessage().startsWith( "Encountered invalid encoding" ) ) {
+            throw new ModelResolutionException( "Encountered invalid encoding in input file " + file, exception.getCause() );
+         }
+         throw exception;
       } catch ( final FileNotFoundException exception ) {
          throw new ModelResolutionException( "File not found: " + file, exception );
       }
@@ -70,8 +77,16 @@ public static RawAspectModelFile load( final String rdfTurtle ) {
    }
 
    private static String content( final InputStream inputStream ) {
-      return new BufferedReader( new InputStreamReader( inputStream, StandardCharsets.UTF_8 ) ).lines()
-            .collect( Collectors.joining( "\n" ) );
+      try {
+         final byte[] bytes = inputStream.readAllBytes();
+         final CharsetDecoder charsetDecoder = StandardCharsets.UTF_8.newDecoder();
+         final CharBuffer decodedCharBuffer = charsetDecoder.decode( ByteBuffer.wrap( bytes ) );
+         return new String( bytes, StandardCharsets.UTF_8 );
+      } catch ( final MalformedInputException | UnmappableCharacterException exception ) {
+         throw new ModelResolutionException( "Encountered invalid encoding in input" );
+      } catch ( final IOException exception ) {
+         throw new RuntimeException( exception );
+      }
    }
 
    private static List<String> headerComment( final String content ) {

core/esmf-aspect-meta-model-java/src/test/java/org/eclipse/esmf/aspectmodel/loader/AspectModelLoaderTest.java

@@ -32,6 +32,7 @@
 import org.eclipse.esmf.aspectmodel.AspectModelFile;
 import org.eclipse.esmf.aspectmodel.resolver.FileSystemStrategy;
 import org.eclipse.esmf.aspectmodel.resolver.ResolutionStrategy;
+import org.eclipse.esmf.aspectmodel.resolver.exceptions.ModelResolutionException;
 import org.eclipse.esmf.metamodel.AbstractEntity;
 import org.eclipse.esmf.metamodel.AspectModel;
 import org.eclipse.esmf.metamodel.ComplexType;
@@ -56,6 +57,13 @@ void loadAspectModelWithoutCharacteristicDatatype() {
             .hasMessage( "No datatype is defined on the Characteristic instance 'Characteristic1: '." );
    }
 
+   @Test
+   void testFileWithInvalidEncoding() {
+      assertThatThrownBy( () -> TestResources.load( InvalidTestAspect.INVALID_ENCODING ) )
+            .isInstanceOf( ModelResolutionException.class )
+            .hasMessageContaining( "Encountered invalid encoding" );
+   }
+
    @Test
    void testOfAbstractEntityCyclomaticCreation() {
       final Map<String, ComplexType> entities =

core/esmf-aspect-model-validator/src/test/java/org/eclipse/esmf/aspectmodel/validation/services/AspectModelValidatorTest.java

@@ -15,13 +15,11 @@
 
 import static org.assertj.core.api.Assertions.assertThat;
 
-import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.function.Supplier;
 
-import org.eclipse.esmf.aspectmodel.loader.AspectModelLoader;
 import org.eclipse.esmf.aspectmodel.resolver.modelfile.MetaModelFile;
 import org.eclipse.esmf.aspectmodel.shacl.fix.Fix;
 import org.eclipse.esmf.aspectmodel.shacl.violation.DatatypeViolation;

core/esmf-test-aspect-models/src/main/java/org/eclipse/esmf/test/InvalidTestAspect.java

@@ -23,6 +23,7 @@ public enum InvalidTestAspect implements TestModel {
    ASPECT_WITH_SAMM_NAMESPACE_FOR_CUSTOM_UNIT,
    ASPECT_WITH_RECURSIVE_PROPERTY,
    INVALID_SYNTAX,
+   INVALID_ENCODING,
    MISSING_ASPECT_DECLARATION,
    INVALID_EXAMPLE_VALUE_DATATYPE,
    INVALID_PREFERRED_NAME_DATATYPE,

core/esmf-test-aspect-models/src/main/resources/invalid/org.eclipse.esmf.test/1.0.0/InvalidEncoding.ttl

@@ -0,0 +1,18 @@
+# Copyright (c) 2023 Robert Bosch Manufacturing Solutions GmbH
+#
+# See the AUTHORS file(s) distributed with this work for additional
+# information regarding authorship.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at https://mozilla.org/MPL/2.0/.
+#
+# SPDX-License-Identifier: MPL-2.0
+
+@prefix : <urn:samm:org.eclipse.esmf.test:1.0.0#> .
+@prefix samm: <urn:samm:org.eclipse.esmf.samm:meta-model:2.1.0#> .
+
+:InvalidSyntax a samm:Aspect ;
+	samm:description "The following umlaut is ISO-8859 encoded: Ä"@en ;
+	samm:properties () ;
+	samm:operations () .