Support struct for Java

.scalafmt.conf

@@ -1,3 +1,3 @@
-version=2.5.2
+version=3.7.14
 runner.dialect=scala212source3
 

flytekit-examples/src/main/java/org/flyte/examples/AllInputsTask.java

@@ -35,8 +35,20 @@ public AllInputsTask() {
         JacksonSdkType.of(AutoAllInputsInput.class), JacksonSdkType.of(AutoAllInputsOutput.class));
   }
 
+  @AutoValue
+  public abstract static class Nested {
+    public abstract String hello();
+
+    public abstract String world();
+
+    public static Nested create(String hello, String world) {
+      return new AutoValue_AllInputsTask_Nested(hello, world);
+    }
+  }
+
   @AutoValue
   public abstract static class AutoAllInputsInput {
+
     public abstract SdkBindingData<Long> i();
 
     public abstract SdkBindingData<Double> f();
@@ -51,6 +63,8 @@ public abstract static class AutoAllInputsInput {
 
     public abstract SdkBindingData<Blob> blob();
 
+    public abstract SdkBindingData<Nested> generic();
+
     public abstract SdkBindingData<List<String>> l();
 
     public abstract SdkBindingData<Map<String, String>> m();
@@ -67,12 +81,13 @@ public static AutoAllInputsInput create(
         SdkBindingData<Instant> t,
         SdkBindingData<Duration> d,
         SdkBindingData<Blob> blob,
+        SdkBindingData<Nested> generic,
         SdkBindingData<List<String>> l,
         SdkBindingData<Map<String, String>> m,
         SdkBindingData<List<String>> emptyList,
         SdkBindingData<Map<String, Long>> emptyMap) {
       return new AutoValue_AllInputsTask_AutoAllInputsInput(
-          i, f, s, b, t, d, blob, l, m, emptyList, emptyMap);
+          i, f, s, b, t, d, blob, generic, l, m, emptyList, emptyMap);
     }
   }
 
@@ -93,6 +108,8 @@ public abstract static class AutoAllInputsOutput {
 
     public abstract SdkBindingData<Blob> blob();
 
+    public abstract SdkBindingData<Nested> generic();
+
     public abstract SdkBindingData<List<String>> l();
 
     public abstract SdkBindingData<Map<String, String>> m();
@@ -109,12 +126,13 @@ public static AutoAllInputsOutput create(
         SdkBindingData<Instant> t,
         SdkBindingData<Duration> d,
         SdkBindingData<Blob> blob,
+        SdkBindingData<Nested> generic,
         SdkBindingData<List<String>> l,
         SdkBindingData<Map<String, String>> m,
         SdkBindingData<List<String>> emptyList,
         SdkBindingData<Map<String, Long>> emptyMap) {
       return new AutoValue_AllInputsTask_AutoAllInputsOutput(
-          i, f, s, b, t, d, blob, l, m, emptyList, emptyMap);
+          i, f, s, b, t, d, blob, generic, l, m, emptyList, emptyMap);
     }
   }
 
@@ -128,6 +146,7 @@ public AutoAllInputsOutput run(AutoAllInputsInput input) {
         input.t(),
         input.d(),
         input.blob(),
+        input.generic(),
         input.l(),
         input.m(),
         input.emptyList(),

flytekit-examples/src/main/java/org/flyte/examples/AllInputsWorkflow.java

@@ -29,12 +29,14 @@
 import org.flyte.api.v1.BlobType;
 import org.flyte.api.v1.BlobType.BlobDimensionality;
 import org.flyte.examples.AllInputsTask.AutoAllInputsOutput;
+import org.flyte.examples.AllInputsTask.Nested;
 import org.flyte.flytekit.SdkBindingData;
 import org.flyte.flytekit.SdkBindingDataFactory;
 import org.flyte.flytekit.SdkNode;
 import org.flyte.flytekit.SdkTypes;
 import org.flyte.flytekit.SdkWorkflow;
 import org.flyte.flytekit.SdkWorkflowBuilder;
+import org.flyte.flytekit.jackson.JacksonSdkLiteralType;
 import org.flyte.flytekit.jackson.JacksonSdkType;
 
 @AutoService(SdkWorkflow.class)
@@ -73,6 +75,8 @@ public AllInputsWorkflowOutput expand(SdkWorkflowBuilder builder, Void noInput)
                                         .build())
                                 .build())
                         .build()),
+                SdkBindingDataFactory.of(
+                    JacksonSdkLiteralType.of(Nested.class), Nested.create("hello", "world")),
                 SdkBindingDataFactory.ofStringCollection(Arrays.asList("foo", "bar")),
                 SdkBindingDataFactory.ofStringMap(Map.of("test", "test")),
                 SdkBindingDataFactory.ofStringCollection(Collections.emptyList()),
@@ -88,6 +92,7 @@ public AllInputsWorkflowOutput expand(SdkWorkflowBuilder builder, Void noInput)
         outputs.t(),
         outputs.d(),
         outputs.blob(),
+        outputs.generic(),
         outputs.l(),
         outputs.m(),
         outputs.emptyList(),
@@ -111,6 +116,8 @@ public abstract static class AllInputsWorkflowOutput {
 
     public abstract SdkBindingData<Blob> blob();
 
+    public abstract SdkBindingData<Nested> generic();
+
     public abstract SdkBindingData<List<String>> l();
 
     public abstract SdkBindingData<Map<String, String>> m();
@@ -127,12 +134,13 @@ public static AllInputsWorkflow.AllInputsWorkflowOutput create(
         SdkBindingData<Instant> t,
         SdkBindingData<Duration> d,
         SdkBindingData<Blob> blob,
+        SdkBindingData<Nested> generic,
         SdkBindingData<List<String>> l,
         SdkBindingData<Map<String, String>> m,
         SdkBindingData<List<String>> emptyList,
         SdkBindingData<Map<String, Long>> emptyMap) {
       return new AutoValue_AllInputsWorkflow_AllInputsWorkflowOutput(
-          i, f, s, b, t, d, blob, l, m, emptyList, emptyMap);
+          i, f, s, b, t, d, blob, generic, l, m, emptyList, emptyMap);
     }
   }
 }

flytekit-jackson/pom.xml

@@ -47,6 +47,10 @@
       <groupId>com.fasterxml.jackson.datatype</groupId>
       <artifactId>jackson-datatype-jsr310</artifactId>
     </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.datatype</groupId>
+      <artifactId>jackson-datatype-jdk8</artifactId>
+    </dependency>
     <dependency>
       <groupId>com.fasterxml.jackson.module</groupId>
       <artifactId>jackson-module-parameter-names</artifactId>

flytekit-jackson/src/main/java/org/flyte/flytekit/jackson/JacksonSdkLiteralType.java

@@ -33,6 +33,7 @@
 import org.flyte.api.v1.Scalar;
 import org.flyte.api.v1.SimpleType;
 import org.flyte.flytekit.SdkLiteralType;
+import org.flyte.flytekit.jackson.deserializers.StructDeserializer.StructWrapper;
 
 /**
  * Implementation of {@link org.flyte.flytekit.SdkLiteralType} for {@link
@@ -102,7 +103,8 @@ public Literal toLiteral(T value) {
     var tree = OBJECT_MAPPER.valueToTree(value);
 
     try {
-      return OBJECT_MAPPER.treeToValue(tree, Literal.class);
+      return Literal.ofScalar(
+          Scalar.ofGeneric(OBJECT_MAPPER.treeToValue(tree, StructWrapper.class).unwrap()));
     } catch (IOException e) {
       throw new UncheckedIOException("toLiteral failed for [" + clazz.getName() + "]: " + value, e);
     }

flytekit-jackson/src/main/java/org/flyte/flytekit/jackson/ObjectMapperUtils.java

@@ -18,6 +18,7 @@
 
 import com.fasterxml.jackson.databind.Module;
 import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.datatype.jdk8.Jdk8Module;
 import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
 import com.fasterxml.jackson.module.paramnames.ParameterNamesModule;
 import com.google.errorprone.annotations.Var;
@@ -36,6 +37,7 @@ static ObjectMapper createObjectMapper(Module... modules) {
 
     return objectMapper
         .registerModule(new JavaTimeModule())
+        .registerModule(new Jdk8Module())
         .registerModule(new ParameterNamesModule());
   }
 }

flytekit-jackson/src/main/java/org/flyte/flytekit/jackson/SdkLiteralTypeModule.java

@@ -20,8 +20,8 @@
 import com.fasterxml.jackson.databind.Module;
 import com.fasterxml.jackson.databind.module.SimpleDeserializers;
 import com.fasterxml.jackson.databind.module.SimpleSerializers;
-import org.flyte.api.v1.Literal;
-import org.flyte.flytekit.jackson.deserializers.LiteralStructDeserializer;
+import org.flyte.flytekit.jackson.deserializers.StructDeserializer;
+import org.flyte.flytekit.jackson.deserializers.StructDeserializer.StructWrapper;
 import org.flyte.flytekit.jackson.serializers.StructSerializer;
 
 class SdkLiteralTypeModule extends Module {
@@ -43,7 +43,7 @@ public void setupModule(SetupContext context) {
     context.addSerializers(serializers);
 
     var deserializers = new SimpleDeserializers();
-    deserializers.addDeserializer(Literal.class, new LiteralStructDeserializer());
+    deserializers.addDeserializer(StructWrapper.class, new StructDeserializer());
     context.addDeserializers(deserializers);
 
     // append with the lowest priority to use as fallback, if builtin annotations aren't present

flytekit-jackson/src/main/java/org/flyte/flytekit/jackson/SdkTypeModule.java

@@ -20,7 +20,6 @@
 import com.fasterxml.jackson.databind.Module;
 import com.fasterxml.jackson.databind.deser.Deserializers;
 import com.fasterxml.jackson.databind.module.SimpleSerializers;
-import org.flyte.flytekit.jackson.deserializers.LiteralMapDeserializers;
 import org.flyte.flytekit.jackson.deserializers.SdkBindingDataDeserializers;
 import org.flyte.flytekit.jackson.serializers.BindingMapSerializers;
 import org.flyte.flytekit.jackson.serializers.LiteralMapSerializers;
@@ -60,7 +59,6 @@ public void setupModule(SetupContext context) {
     context.addSerializers(serializers);
 
     context.addSerializers(new LiteralMapSerializers());
-    context.addDeserializers(new LiteralMapDeserializers());
     context.addSerializers(new BindingMapSerializers());
     context.addDeserializers(sdkbindingDeserializers);
 

flytekit-jackson/src/main/java/org/flyte/flytekit/jackson/VariableMapVisitor.java

@@ -175,9 +175,12 @@ private SdkLiteralType<?> toLiteralType(
       return SdkLiteralTypes.blobs(
           BlobType.builder().format("").dimensionality(BlobDimensionality.SINGLE).build());
     }
-    // TODO: Support structs
-    throw new UnsupportedOperationException(
-        String.format("Unsupported type: [%s]", type.getName()));
+    try {
+      return JacksonSdkLiteralType.of(type);
+    } catch (Exception e) {
+      throw new UnsupportedOperationException(
+          String.format("Unsupported type: [%s]", type.getName()), e);
+    }
   }
 
   private static boolean isPrimitiveAssignableFrom(Class<?> fromClass, Class<?> toClass) {