Make serialized workflow compatible with schema (#224) (#233)

Signed-off-by: Francisco Javier Tirado Sarti <ftirados@redhat.com>
Signed-off-by: Ricardo Zanini <zanini@redhat.com>
Co-authored-by: Francisco Javier Tirado Sarti <65240126+fjtirado@users.noreply.github.com>

Author: ricardozanini

api/src/main/java/io/serverlessworkflow/api/serializers/WorkflowSerializer.java

@@ -110,9 +110,6 @@ public void serialize(Workflow workflow, JsonGenerator gen, SerializerProvider p
         gen.writeObject(eventDefinition);
       }
       gen.writeEndArray();
-    } else {
-      gen.writeArrayFieldStart("events");
-      gen.writeEndArray();
     }
 
     if (workflow.getFunctions() != null && !workflow.getFunctions().getFunctionDefs().isEmpty()) {
@@ -121,9 +118,6 @@ public void serialize(Workflow workflow, JsonGenerator gen, SerializerProvider p
         gen.writeObject(function);
       }
       gen.writeEndArray();
-    } else {
-      gen.writeArrayFieldStart("functions");
-      gen.writeEndArray();
     }
 
     if (workflow.getRetries() != null && !workflow.getRetries().getRetryDefs().isEmpty()) {
@@ -132,9 +126,6 @@ public void serialize(Workflow workflow, JsonGenerator gen, SerializerProvider p
         gen.writeObject(retry);
       }
       gen.writeEndArray();
-    } else {
-      gen.writeArrayFieldStart("retries");
-      gen.writeEndArray();
     }
 
     if (workflow.getErrors() != null && !workflow.getErrors().getErrorDefs().isEmpty()) {
@@ -143,9 +134,6 @@ public void serialize(Workflow workflow, JsonGenerator gen, SerializerProvider p
         gen.writeObject(error);
       }
       gen.writeEndArray();
-    } else {
-      gen.writeArrayFieldStart("errors");
-      gen.writeEndArray();
     }
 
     if (workflow.getSecrets() != null && !workflow.getSecrets().getSecretDefs().isEmpty()) {
@@ -154,9 +142,6 @@ public void serialize(Workflow workflow, JsonGenerator gen, SerializerProvider p
         gen.writeString(secretDef);
       }
       gen.writeEndArray();
-    } else {
-      gen.writeArrayFieldStart("secrets");
-      gen.writeEndArray();
     }
 
     if (workflow.getConstants() != null && !workflow.getConstants().getConstantsDef().isEmpty()) {
@@ -177,9 +162,6 @@ public void serialize(Workflow workflow, JsonGenerator gen, SerializerProvider p
         gen.writeObject(state);
       }
       gen.writeEndArray();
-    } else {
-      gen.writeArrayFieldStart("states");
-      gen.writeEndArray();
     }
 
     if (workflow.getExtensions() != null && !workflow.getExtensions().isEmpty()) {