[196] Implementation of ViewpointDefinition in export to textual files

Bug: #196
Signed-off-by: Walid Bilem <walid.bilem@obeosoft.com>

Author: wbilem

backend/application/syson-sysml-export/src/main/java/org/eclipse/syson/sysml/export/SysMLElementSerializer.java

@@ -109,6 +109,7 @@
 import org.eclipse.syson.sysml.Type;
 import org.eclipse.syson.sysml.Usage;
 import org.eclipse.syson.sysml.UseCaseDefinition;
+import org.eclipse.syson.sysml.ViewpointDefinition;
 import org.eclipse.syson.sysml.VisibilityKind;
 import org.eclipse.syson.sysml.export.utils.Appender;
 import org.eclipse.syson.sysml.export.utils.NameDeresolver;
@@ -827,6 +828,21 @@ public String caseRequirementDefinition(RequirementDefinition requirement) {
         return builder.toString();
     }
 
+    @Override
+    public String caseViewpointDefinition(ViewpointDefinition vp) {
+        Appender builder = this.newAppender();
+
+        this.appendDefinitionPrefix(builder, vp);
+
+        builder.appendSpaceIfNeeded().append("viewpoint def");
+
+        this.appendDefinitionDeclaration(builder, vp);
+
+        this.appendChildrenContent(builder, vp, vp.getOwnedMembership());
+
+        return builder.toString();
+    }
+
     @Override
     public String caseMetadataDefinition(MetadataDefinition metadata) {
         Appender builder = this.newAppender();

backend/application/syson-sysml-export/src/test/java/org/eclipse/syson/sysml/export/SysMLElementSerializerTest.java

@@ -78,6 +78,7 @@
 import org.eclipse.syson.sysml.SysmlFactory;
 import org.eclipse.syson.sysml.UseCaseDefinition;
 import org.eclipse.syson.sysml.VerificationCaseUsage;
+import org.eclipse.syson.sysml.ViewpointDefinition;
 import org.eclipse.syson.sysml.VisibilityKind;
 import org.eclipse.syson.sysml.export.models.AssertConstraintUsageWithOperatorExpressionTestModel;
 import org.eclipse.syson.sysml.export.models.AttributeUsageWithBinaryOperatorExpressionTestModel;
@@ -1122,6 +1123,17 @@ public void literalInfinity() {
         this.assertTextualFormEquals("*", literalInf);
     }
 
+    @Test
+    public void viewpointDefinition() {
+        ViewpointDefinition vp = this.builder.createWithName(ViewpointDefinition.class, "vpdef");
+
+        this.builder.createIn(Documentation.class, vp).setBody("A comment");
+        this.assertTextualFormEquals("""
+                viewpoint def vpdef {
+                    doc/* A comment */
+                }""", vp);
+    }
+
     @Test
     public void metadataDefinition() {
         MetadataDefinition metadata = this.builder.createWithName(MetadataDefinition.class, "mtdef");