jackson work

jackson/src/test/java/org/baeldung/jackson/JacksonDeserializationUnitTest.java

@@ -1,72 +1,25 @@
 package org.baeldung.jackson;
 
-import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.equalTo;
-import static org.hamcrest.Matchers.not;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertThat;
 
 import java.io.IOException;
-import java.util.List;
 
 import org.junit.Test;
 
 import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.core.JsonParser;
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.DeserializationContext;
 import com.fasterxml.jackson.databind.DeserializationFeature;
+import com.fasterxml.jackson.databind.JsonDeserializer;
 import com.fasterxml.jackson.databind.JsonMappingException;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.deser.DeserializationProblemHandler;
 import com.fasterxml.jackson.databind.exc.UnrecognizedPropertyException;
-import com.google.common.collect.Lists;
 
-public class JacksonUnitTest {
+public class JacksonDeserializationUnitTest {
-
-    // tests - single entity to json
-
-    @Test
-    public final void givenOnlyNonDefaultValuesAreSerialized_whenDtoHasOnlyDefaultValues_thenCorrect() throws JsonParseException, IOException {
-        final ObjectMapper mapper = new ObjectMapper();
-        final String dtoAsString = mapper.writeValueAsString(new FooDto());
-
-        assertThat(dtoAsString, not(containsString("intValue")));
-        System.out.println(dtoAsString);
-    }
-
-    @Test
-    public final void givenOnlyNonDefaultValuesAreSerialized_whenDtoHasNonDefaultValue_thenCorrect() throws JsonParseException, IOException {
-        final ObjectMapper mapper = new ObjectMapper();
-        final FooDto dtoObject = new FooDto();
-        dtoObject.setBooleanValue(true);
-
-        final String dtoAsString = mapper.writeValueAsString(dtoObject);
-
-        assertThat(dtoAsString, containsString("booleanValue"));
-        System.out.println(dtoAsString);
-    }
-
-    @Test
-    public final void givenFieldIsIgnored_whenDtoIsSerialized_thenCorrect() throws JsonParseException, IOException {
-        final ObjectMapper mapper = new ObjectMapper();
-        final BarDto dtoObject = new BarDto();
-        dtoObject.setBooleanValue(true);
-
-        final String dtoAsString = mapper.writeValueAsString(dtoObject);
-
-        assertThat(dtoAsString, not(containsString("intValue")));
-        assertThat(dtoAsString, containsString("booleanValue"));
-        System.out.println(dtoAsString);
-    }
-
-    // tests - multiple entities to json
-
-    @Test
-    public final void whenDtoIsSerialized_thenCorrect() throws JsonParseException, IOException {
-        final List<MyDto> listOfDtos = Lists.newArrayList(new MyDto("a", 1, true), new MyDto("bc", 3, false));
-
-        final ObjectMapper mapper = new ObjectMapper();
-        final String dtosAsString = mapper.writeValueAsString(listOfDtos);
-
-        System.out.println(dtosAsString);
-    }
 
     // tests - json to single entity
 
@@ -120,14 +73,14 @@ public class JacksonUnitTest {
         assertThat(readValue.getStringValue(), equalTo("a"));
         assertThat(readValue.isBooleanValue(), equalTo(true));
         assertThat(readValue.getIntValue(), equalTo(1));
-    }
 
-    // tests - json to multiple entities
+        mapper.addHandler(new DeserializationProblemHandler() {
+            @Override
+            public boolean handleUnknownProperty(final DeserializationContext ctxt, final JsonParser jp, final JsonDeserializer<?> deserializer, final Object beanOrClass, final String propertyName) throws IOException, JsonProcessingException {
+                return super.handleUnknownProperty(ctxt, jp, deserializer, beanOrClass, propertyName);
+            }
+        });
+    }
 
 }
 
-/*
-Article Ideas:
-- Deserializing with a custom JsonParser
-- Jackson Ignore: ignore specific fields at field level, at class level,
- */

jackson/src/test/java/org/baeldung/jackson/JacksonSerializationUnitTest.java

@@ -0,0 +1,66 @@
+package org.baeldung.jackson;
+
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.not;
+import static org.junit.Assert.assertThat;
+
+import java.io.IOException;
+import java.util.List;
+
+import org.junit.Test;
+
+import com.fasterxml.jackson.core.JsonParseException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.google.common.collect.Lists;
+
+public class JacksonSerializationUnitTest {
+
+    // tests - single entity to json
+
+    @Test
+    public final void givenOnlyNonDefaultValuesAreSerialized_whenDtoHasOnlyDefaultValues_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final String dtoAsString = mapper.writeValueAsString(new FooDto());
+
+        assertThat(dtoAsString, not(containsString("intValue")));
+        System.out.println(dtoAsString);
+    }
+
+    @Test
+    public final void givenOnlyNonDefaultValuesAreSerialized_whenDtoHasNonDefaultValue_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final FooDto dtoObject = new FooDto();
+        dtoObject.setBooleanValue(true);
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, containsString("booleanValue"));
+        System.out.println(dtoAsString);
+    }
+
+    @Test
+    public final void givenFieldIsIgnored_whenDtoIsSerialized_thenCorrect() throws JsonParseException, IOException {
+        final ObjectMapper mapper = new ObjectMapper();
+        final BarDto dtoObject = new BarDto();
+        dtoObject.setBooleanValue(true);
+
+        final String dtoAsString = mapper.writeValueAsString(dtoObject);
+
+        assertThat(dtoAsString, not(containsString("intValue")));
+        assertThat(dtoAsString, containsString("booleanValue"));
+        System.out.println(dtoAsString);
+    }
+
+    // tests - multiple entities to json
+
+    @Test
+    public final void whenDtoIsSerialized_thenCorrect() throws JsonParseException, IOException {
+        final List<MyDto> listOfDtos = Lists.newArrayList(new MyDto("a", 1, true), new MyDto("bc", 3, false));
+
+        final ObjectMapper mapper = new ObjectMapper();
+        final String dtosAsString = mapper.writeValueAsString(listOfDtos);
+
+        System.out.println(dtosAsString);
+    }
+
+}