Adding a first RDF parser. However, serialization is not yet fully done, so it is difficult to test.

Author: Matthias Böckmann

dataformat-jsonld/pom.xml

@@ -35,25 +35,8 @@
         </dependency>
         <dependency>
             <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-api</artifactId>
-            <version>${slf4j.version}</version>
-        </dependency>
-        <dependency>
-            <groupId>org.slf4j</groupId>
-            <artifactId>slf4j-log4j12</artifactId>
-            <version>1.7.31</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>log4j-core</artifactId>
-            <version>2.14.1</version>
-            <scope>test</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.apache.logging.log4j</groupId>
-            <artifactId>log4j-api</artifactId>
-            <version>2.14.1</version>
+            <artifactId>slf4j-simple</artifactId>
+            <version>1.7.30</version>
             <scope>test</scope>
         </dependency>
 

dataformat-jsonld/src/main/java/io/adminshell/aas/v3/dataformat/jsonld/JsonLDModule.java

@@ -5,6 +5,7 @@
 import io.adminshell.aas.v3.dataformat.jsonld.custom.BigDecimalSerializer;
 import io.adminshell.aas.v3.dataformat.jsonld.custom.XMLGregorianCalendarDeserializer;
 import io.adminshell.aas.v3.dataformat.jsonld.custom.XMLGregorianCalendarSerializer;
+import io.adminshell.aas.v3.model.LangString;
 
 import java.math.BigDecimal;
 import java.net.URI;
@@ -29,6 +30,7 @@ public JsonLDModule() {
         addSerializer(BigDecimal.class, new BigDecimalSerializer());
 
         addSerializer(URI.class, new UriSerializer());
+        addSerializer(LangString.class, new LangStringSerializer());
     }
 
 }

dataformat-jsonld/src/main/java/io/adminshell/aas/v3/dataformat/jsonld/JsonLDSerializer.java

@@ -26,20 +26,7 @@ public class JsonLDSerializer extends BeanSerializer {
 
     private static int currentRecursionDepth = 0;
 
-    static final Map<String, String> contextItems;
-
-    static {
-        contextItems = new HashMap<>();
-        contextItems.put("ids", "https://w3id.org/idsa/core/");
-        contextItems.put("idsc", "https://w3id.org/idsa/code/");
-        contextItems.put("xsd", "http://www.w3.org/2001/XMLSchema#");
-        contextItems.put("owl", "http://www.w3.org/2002/07/owl#");
-        contextItems.put("rdf", "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
-        contextItems.put("aas", "https://admin-shell.io/aas/3/0/RC01/");
-        contextItems.put("iec61360", "https://admin-shell.io/DataSpecificationTemplates/DataSpecificationIEC61360/3/0/RC01/");
-        contextItems.put("phys_unit", "https://admin-shell.io/DataSpecificationTemplates/DataSpecificationPhysicalUnit/3/0/RC01/");
-    }
-
+    static final Map<String, String> contextItems = new HashMap<>();
 
     JsonLDSerializer(BeanSerializerBase src) {
         super(src);

dataformat-jsonld/src/main/java/io/adminshell/aas/v3/dataformat/jsonld/LangStringSerializer.java

@@ -0,0 +1,38 @@
+package io.adminshell.aas.v3.dataformat.jsonld;
+
+import java.io.IOException;
+
+
+import com.fasterxml.jackson.core.JsonGenerator;
+import com.fasterxml.jackson.databind.SerializerProvider;
+import com.fasterxml.jackson.databind.ser.std.StdSerializer;
+import io.adminshell.aas.v3.model.LangString;
+
+public class LangStringSerializer extends StdSerializer<LangString> {
+
+
+    public LangStringSerializer() {
+        this(null);
+    }
+
+    public LangStringSerializer(Class clazz) {
+        super(clazz);
+    }
+
+
+    @Override
+    public void serialize(LangString value, JsonGenerator gen, SerializerProvider provider) throws IOException {
+        gen.writeStartObject();
+        if(value.getLanguage() != null && !value.getLanguage().isEmpty())
+        {
+            gen.writeStringField("@language", value.getLanguage());
+        }
+        else
+        {
+            gen.writeStringField("@type", "rdf:langString");
+        }
+        gen.writeStringField("@value", value.getValue());
+        gen.writeEndObject();
+    }
+
+}