added support of transient modifier within VPack de-/serialization

Author: Mark

ChangeLog

@@ -3,6 +3,7 @@ v4.1.5 (2017-01-xx)
 * fixed VPack parsing of fields of type Object
 * fixed VPack serializing of array with null values (issue #88)
 * added configuration for custom annotations within VPack de-/serialization
+* added support of transient modifier within VPack de-/serialization
 
 v4.1.4 (2016-12-19)
 ---------------------------

src/main/java/com/arangodb/velocypack/internal/VPackCache.java

@@ -118,7 +118,8 @@ public Map<String, FieldInfo> getFields(final Type entityClass) {
 			while (tmp != null && tmp != Object.class) {
 				final Field[] declaredFields = tmp.getDeclaredFields();
 				for (final Field field : declaredFields) {
-					if (!field.isSynthetic() && !Modifier.isStatic(field.getModifiers())) {
+					if (!field.isSynthetic() && !Modifier.isStatic(field.getModifiers())
+							&& !Modifier.isTransient(field.getModifiers())) {
 						field.setAccessible(true);
 						final FieldInfo fieldInfo = createFieldInfo(field);
 						if (fieldInfo.serialize || fieldInfo.deserialize) {

src/test/java/com/arangodb/velocypack/VPackSerializeDeserializeTest.java

@@ -3455,4 +3455,30 @@ public void uuid() {
 		assertThat(entity2, is(notNullValue()));
 		assertThat(entity2.getUuid(), is(entity.getUuid()));
 	}
+
+	private static class TransientEntity {
+		private transient String foo;
+
+		public TransientEntity() {
+			super();
+		}
+	}
+
+	@Test
+	public void fromTransient() {
+		final TransientEntity entity = new TransientEntity();
+		entity.foo = "bar";
+		final VPackSlice vpack = new VPack.Builder().build().serialize(entity);
+		assertThat(vpack, is(notNullValue()));
+		assertThat(vpack.isObject(), is(true));
+		assertThat(vpack.get("foo").isNone(), is(true));
+	}
+
+	@Test
+	public void toTransient() {
+		final VPackSlice vpack = new VPackBuilder().add(ValueType.OBJECT).add("foo", "bar").close().slice();
+		final TransientEntity entity = new VPack.Builder().build().deserialize(vpack, TransientEntity.class);
+		assertThat(entity, is(notNullValue()));
+		assertThat(entity.foo, is(nullValue()));
+	}
 }