Examples for the second version of the article

json-2/src/main/java/com/baeldung/jsonld/deserialization/jsonldjava/jackson/JacksonDeserializationExample.java

@@ -1,40 +0,0 @@
-package com.baeldung.jsonld.deserialization.jsonldjava.jackson;
-
-import java.io.IOException;
-import java.util.HashMap;
-import java.util.Map;
-
-import com.fasterxml.jackson.databind.ObjectMapper;
-import com.github.jsonldjava.core.JsonLdOptions;
-import com.github.jsonldjava.core.JsonLdProcessor;
-import com.github.jsonldjava.utils.JsonUtils;
-
-public class JacksonDeserializationExample {
-    public static void main(String[] args) throws IOException {
-        String exampleJsonld ="{" + 
-           "  \"@context\": {" + 
-           "    \"@vocab\": \"http://schema.org/\"," + 
-           "    \"knows\": {" + 
-           "      \"@type\": \"@id\"" + 
-           "    }" + 
-           "  }," + 
-           "  \"@type\": \"Person\"," + 
-           "  \"@id\": \"http://example.com/person/1234\"," + 
-           "  \"name\": \"Example Name\"," + 
-           "  \"knows\": \"http://example.com/person/2345\"" + 
-           "}";
-
-        Object jsonObject = JsonUtils.fromString(exampleJsonld);
-        Object compact = JsonLdProcessor.compact(jsonObject, new HashMap(), new JsonLdOptions());
-        String compactContent = JsonUtils.toString(compact);
-
-        System.out.println(JsonUtils.toPrettyString(compact));
-
-        ObjectMapper objectMapper = new ObjectMapper();
-        JacksonExamplePerson person = objectMapper.readValue(compactContent, JacksonExamplePerson.class);
-
-        System.out.println(person.id);
-        System.out.println(person.name);
-        System.out.println(person.knows.id);
-    }
-}

json-2/src/main/java/com/baeldung/jsonld/serialization/hydrajsonld/HydraJsonldExamplePerson.java

@@ -1,15 +0,0 @@
-package com.baeldung.jsonld.serialization.hydrajsonld;
-
-import com.fasterxml.jackson.annotation.JsonProperty;
-
-import de.escalon.hypermedia.hydra.mapping.Expose;
-import de.escalon.hypermedia.hydra.mapping.Vocab;
-
-@Vocab("http://example.com/vocab/")
-@Expose("person")
-public class HydraJsonldExamplePerson {
-    @JsonProperty("@id")
-    public String id;
-    @Expose("fullName")
-    public String name;
-}

json-2/src/main/java/com/baeldung/jsonld/serialization/jacksonjsonld/JacksonJsonLdSerializationExample.java

@@ -1,25 +0,0 @@
-package com.baeldung.jsonld.serialization.jacksonjsonld;
-
-import java.io.IOException;
-
-import com.fasterxml.jackson.databind.ObjectMapper;
-
-import ioinformarics.oss.jackson.module.jsonld.HydraCollection;
-import ioinformarics.oss.jackson.module.jsonld.JsonldGraph;
-import ioinformarics.oss.jackson.module.jsonld.JsonldModule;
-import ioinformarics.oss.jackson.module.jsonld.JsonldResource;
-
-public class JacksonJsonLdSerializationExample {
-    public static void main(String[] args) throws IOException {
-        ObjectMapper objectMapper = new ObjectMapper();
-        objectMapper.registerModule(new JsonldModule());
-
-        JacksonJsonldExamplePerson person = new JacksonJsonldExamplePerson();
-
-        JsonldResource jsonldResource = JsonldResource.Builder.create()
-            .build(person);
-
-        System.out.println(objectMapper.writerWithDefaultPrettyPrinter()
-            .writeValueAsString(jsonldResource));
-    }
-}

json-2/src/main/java/com/baeldung/jsonld/serialization/jacksonjsonld/JacksonJsonldExamplePerson.java

@@ -1,17 +0,0 @@
-package com.baeldung.jsonld.serialization.jacksonjsonld;
-
-import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldId;
-import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldLink;
-import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldNamespace;
-import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldProperty;
-import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldType;
-
-@JsonldNamespace(name = "s", uri = "http://schema.org/")
-@JsonldLink(rel = "s:knows", name = "knows", href = "http://example.com/person/2345")
-@JsonldType("s:Person")
-class JacksonJsonldExamplePerson {
-    @JsonldId
-    public String id = "http://example.com/person/1234";
-    @JsonldProperty("s:name")
-    public String name = "Example Name";
-}

json-2/src/test/java/com/baeldung/jsonld/deserialization/jsonldjava/jackson/JacksonDeserializationUnitTest.java

@@ -0,0 +1,41 @@
+package com.baeldung.jsonld.deserialization.jsonldjava.jackson;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.io.IOException;
+import java.util.HashMap;
+
+import org.junit.jupiter.api.Test;
+
+import com.baeldung.jsonld.deserialization.jsonldjava.jackson.Person.Link;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.github.jsonldjava.core.JsonLdOptions;
+import com.github.jsonldjava.core.JsonLdProcessor;
+import com.github.jsonldjava.utils.JsonUtils;
+
+public class JacksonDeserializationUnitTest {
+
+    @Test
+    void givenAJsonLdObject_whenCompactIsUsedWithEmptyContext_thenItCanBeDeserializedIntoAJacksonAnnotatedJavaObject() throws IOException {
+        String inputJsonLd = "{\"@context\":{\"@vocab\":\"http://schema.org/\",\"knows\":{\"@type\":\"@id\"}},\"@type\":\"Person\",\"@id\":\"http://example.com/person/1234\",\"name\":\"Example Name\",\"knows\":\"http://example.com/person/2345\"}";
+
+        Object jsonObject = JsonUtils.fromString(inputJsonLd);
+        Object compact = JsonLdProcessor.compact(jsonObject, new HashMap(), new JsonLdOptions());
+        String compactContent = JsonUtils.toString(compact);
+
+        assertEquals("{\"@id\":\"http://example.com/person/1234\",\"@type\":\"http://schema.org/Person\",\"http://schema.org/knows\":{\"@id\":\"http://example.com/person/2345\"},\"http://schema.org/name\":\"Example Name\"}", compactContent);
+
+        ObjectMapper objectMapper = new ObjectMapper();
+        Person person = objectMapper.readValue(compactContent, Person.class);
+
+        Person expectedPerson = new Person();
+        expectedPerson.id = "http://example.com/person/1234";
+        expectedPerson.name = "Example Name";
+        expectedPerson.knows = new Link();
+        expectedPerson.knows.id = "http://example.com/person/2345";
+
+        assertEquals(expectedPerson.id, person.id);
+        assertEquals(expectedPerson.name, person.name);
+        assertEquals(expectedPerson.knows.id, person.knows.id);
+    }
+}

json-2/src/test/java/com/baeldung/jsonld/deserialization/jsonldjava/jackson/Person.java

@@ -4,7 +4,7 @@ import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 
 @JsonIgnoreProperties(ignoreUnknown = true)
-public class JacksonExamplePerson {
+public class Person {
     @JsonProperty("@id")
     public String id;
     @JsonProperty("http://schema.org/name")
@@ -12,7 +12,7 @@ public class JacksonExamplePerson {
     @JsonProperty("http://schema.org/knows")
     public Link knows;
 
-    public class Link {
+    public static class Link {
         @JsonProperty("@id")
         public String id;
     }

json-2/src/test/java/com/baeldung/jsonld/serialization/hydrajsonld/HydraJsonldSerializationUnitTest.java

@@ -1,8 +1,12 @@
 package com.baeldung.jsonld.serialization.hydrajsonld;
 
-import java.io.IOException;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
 
 import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import com.fasterxml.jackson.core.JsonProcessingException;
 import com.fasterxml.jackson.databind.BeanDescription;
 import com.fasterxml.jackson.databind.JsonSerializer;
 import com.fasterxml.jackson.databind.ObjectMapper;
@@ -11,23 +15,36 @@ import com.fasterxml.jackson.databind.module.SimpleModule;
 import com.fasterxml.jackson.databind.ser.BeanSerializerModifier;
 import com.fasterxml.jackson.databind.ser.std.BeanSerializerBase;
 
+import de.escalon.hypermedia.hydra.mapping.Expose;
+import de.escalon.hypermedia.hydra.mapping.Vocab;
 import de.escalon.hypermedia.hydra.serialize.JacksonHydraSerializer;
 
-public class HydraJsonldSerializationExample {
+public class HydraJsonldSerializationUnitTest {
-    public static void main(String[] args) throws IOException {
+    @Vocab("http://example.com/vocab/")
-        ObjectMapper mapper = new ObjectMapper();
+    @Expose("person")
-        mapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+    static class Person {
-        mapper.registerModule(getJacksonHydraSerializerModule());
+        @JsonProperty("@id")
+        public String id;
+        @Expose("fullName")
+        public String name;
+    }
 
-        HydraJsonldExamplePerson person = new HydraJsonldExamplePerson();
+    @Test
+    void givenAHydraJsonldAnnotatedObject_whenJacksonHydraSerializerIsUsed_thenAJsonLdDocumentIsGenerated() throws JsonProcessingException {
+        ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.registerModule(getJacksonHydraSerializerModule());
+        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
+
+        Person person = new Person();
         person.id = "http://example.com/person/1234";
         person.name = "Example Name";
 
-        System.out.println(mapper.writerWithDefaultPrettyPrinter()
+        String personJsonLd = objectMapper.writeValueAsString(person);
-            .writeValueAsString(person));
+
+        assertEquals("{\"@context\":{\"@vocab\":\"http://example.com/vocab/\",\"name\":\"fullName\"},\"@type\":\"person\",\"name\":\"Example Name\",\"@id\":\"http://example.com/person/1234\"}", personJsonLd);
     }
 
-    public static SimpleModule getJacksonHydraSerializerModule() {
+    static SimpleModule getJacksonHydraSerializerModule() {
         return new SimpleModule() {
 
             @Override

json-2/src/test/java/com/baeldung/jsonld/serialization/jacksonjsonld/JacksonJsonLdSerializationUnitTest.java

@@ -0,0 +1,42 @@
+package com.baeldung.jsonld.serialization.jacksonjsonld;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+
+import ioinformarics.oss.jackson.module.jsonld.JsonldModule;
+import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldId;
+import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldLink;
+import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldNamespace;
+import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldProperty;
+import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldResource;
+import ioinformarics.oss.jackson.module.jsonld.annotation.JsonldType;
+
+public class JacksonJsonLdSerializationUnitTest {
+    @JsonldResource
+    @JsonldNamespace(name = "s", uri = "http://schema.org/")
+    @JsonldType("s:Person")
+    @JsonldLink(rel = "s:knows", name = "knows", href = "http://example.com/person/2345")
+    static class Person {
+        @JsonldId
+        public String id = "http://example.com/person/1234";
+        @JsonldProperty("s:name")
+        public String name = "Example Name";
+    }
+
+    @Test
+    void givenAJacksonJsonldAnnotatedObject_whenJsonldModuleIsUsed_thenAJsonLdDocumentIsGenerated() throws JsonProcessingException {
+        ObjectMapper objectMapper = new ObjectMapper();
+        objectMapper.registerModule(new JsonldModule());
+
+        Person person = new Person();
+        String personJsonLd = objectMapper.writeValueAsString(person);
+
+        assertEquals(
+            "{\"@type\":\"s:Person\",\"@context\":{\"s\":\"http://schema.org/\",\"name\":\"s:name\",\"knows\":{\"@id\":\"s:knows\",\"@type\":\"@id\"}},\"name\":\"Example Name\",\"@id\":\"http://example.com/person/1234\",\"knows\":\"http://example.com/person/2345\"}",
+            personJsonLd);
+    }
+}