BUG-32607: expose json serialization for individual type artifacts

typesystem/src/main/scala/org/apache/hadoop/metadata/typesystem/TypesDef.scala

@@ -25,6 +25,17 @@ case class TypesDef(enumTypes: Seq[EnumTypeDefinition],
                     traitTypes: Seq[HierarchicalTypeDefinition[TraitType]],
                     classTypes: Seq[HierarchicalTypeDefinition[ClassType]]) {
 
+    def this(enumType : EnumTypeDefinition) = this(Seq(enumType), Seq(), Seq(), Seq())
+    def this(structType: StructTypeDefinition) = this(Seq(), Seq(structType), Seq(), Seq())
+    def this(typ: HierarchicalTypeDefinition[_], isTrait : Boolean) = this(
+      Seq(),
+      Seq(),
+      if ( isTrait )
+        Seq(typ.asInstanceOf[HierarchicalTypeDefinition[TraitType]]) else Seq(),
+      if (!isTrait )
+        Seq(typ.asInstanceOf[HierarchicalTypeDefinition[ClassType]]) else Seq()
+    )
+
     def enumTypesAsJavaList() = {
         import scala.collection.JavaConverters._
         enumTypes.asJava

typesystem/src/main/scala/org/apache/hadoop/metadata/typesystem/json/TypesSerialization.scala

@@ -99,6 +99,24 @@ object TypesSerialization {
         read[TypesDef](jsonStr)
     }
 
+    def toJson(typesDef : TypesDef) : String = {
+      implicit val formats = org.json4s.native.Serialization.formats(NoTypeHints) + new MultiplicitySerializer
+      writePretty(typesDef)
+
+    }
+
+    def toJson(enumTypeDefinition: EnumTypeDefinition) : String = {
+      toJson(new TypesDef(enumTypeDefinition))
+    }
+
+    def toJson(structTypeDefinition: StructTypeDefinition) : String = {
+      toJson(new TypesDef(structTypeDefinition))
+    }
+
+    def toJson(typDef: HierarchicalTypeDefinition[_], isTrait : Boolean) : String = {
+      toJson(new TypesDef(typDef, isTrait))
+    }
+
   private def convertAttributeInfoToAttributeDef(aInfo: AttributeInfo) = {
         new AttributeDefinition(aInfo.name, aInfo.dataType().getName, aInfo.multiplicity,
             aInfo.isComposite, aInfo.reverseAttributeName)

typesystem/src/test/scala/org/apache/hadoop/metadata/typesystem/json/TypesSerializationTest.scala

@@ -146,4 +146,156 @@ class TypesSerializationTest extends BaseTest with TypeHelpers {
 
         Assert.assertEquals(typesDef1, typesDef2)
     }
+
+  @Test def test2: Unit = {
+
+    val sDef = structDef("ts1", requiredAttr("a", DataTypes.INT_TYPE),
+      optionalAttr("b", DataTypes.BOOLEAN_TYPE),
+      optionalAttr("c", DataTypes.BYTE_TYPE),
+      optionalAttr("d", DataTypes.SHORT_TYPE),
+      optionalAttr("e", DataTypes.INT_TYPE),
+      optionalAttr("f", DataTypes.INT_TYPE),
+      optionalAttr("g", DataTypes.LONG_TYPE),
+      optionalAttr("h", DataTypes.FLOAT_TYPE),
+      optionalAttr("i", DataTypes.DOUBLE_TYPE),
+      optionalAttr("j", DataTypes.BIGINTEGER_TYPE),
+      optionalAttr("k", DataTypes.BIGDECIMAL_TYPE),
+      optionalAttr("l", DataTypes.DATE_TYPE),
+      optionalAttr("m", DataTypes.arrayTypeName(DataTypes.INT_TYPE)),
+      optionalAttr("n", DataTypes.arrayTypeName(DataTypes.BIGDECIMAL_TYPE)),
+      optionalAttr("o", DataTypes.mapTypeName(DataTypes.STRING_TYPE, DataTypes.DOUBLE_TYPE)))
+
+
+
+    val ser2 = TypesSerialization.toJson(sDef)
+    val typesDef2 = TypesSerialization.fromJson(ser2)
+
+    Assert.assertEquals(sDef, typesDef2.structTypes(0))
+  }
+
+  @Test def test3: Unit = {
+
+    val sDef = structDef("ts1", requiredAttr("a", DataTypes.INT_TYPE),
+      optionalAttr("b", DataTypes.BOOLEAN_TYPE),
+      optionalAttr("c", DataTypes.BYTE_TYPE),
+      optionalAttr("d", DataTypes.SHORT_TYPE),
+      optionalAttr("e", DataTypes.INT_TYPE),
+      optionalAttr("f", DataTypes.INT_TYPE),
+      optionalAttr("g", DataTypes.LONG_TYPE),
+      optionalAttr("h", DataTypes.FLOAT_TYPE),
+      optionalAttr("i", DataTypes.DOUBLE_TYPE),
+      optionalAttr("j", DataTypes.BIGINTEGER_TYPE),
+      optionalAttr("k", DataTypes.BIGDECIMAL_TYPE),
+      optionalAttr("l", DataTypes.DATE_TYPE),
+      optionalAttr("m", DataTypes.arrayTypeName(DataTypes.INT_TYPE)),
+      optionalAttr("n", DataTypes.arrayTypeName(DataTypes.BIGDECIMAL_TYPE)),
+      optionalAttr("o", DataTypes.mapTypeName(DataTypes.STRING_TYPE, DataTypes.DOUBLE_TYPE)))
+
+
+
+    val ser2 = TypesSerialization.toJson(sDef)
+    val typesDef2 = TypesSerialization.fromJson(ser2)
+
+    Assert.assertEquals(sDef, typesDef2.structTypes(0))
+  }
+
+  @Test def test4 : Unit = {
+
+    val A: HierarchicalTypeDefinition[TraitType] = createTraitTypeDef("A", List(),
+      requiredAttr("a", DataTypes.INT_TYPE),
+      optionalAttr("b", DataTypes.BOOLEAN_TYPE),
+      optionalAttr("c", DataTypes.BYTE_TYPE),
+      optionalAttr("d", DataTypes.SHORT_TYPE))
+    val B: HierarchicalTypeDefinition[TraitType] =
+      createTraitTypeDef("B", Seq("A"), optionalAttr("b", DataTypes.BOOLEAN_TYPE))
+    val C: HierarchicalTypeDefinition[TraitType] =
+      createTraitTypeDef("C", Seq("A"), optionalAttr("c", DataTypes.BYTE_TYPE))
+    val D: HierarchicalTypeDefinition[TraitType] =
+      createTraitTypeDef("D", Seq("B", "C"), optionalAttr("d", DataTypes.SHORT_TYPE))
+
+    val typDefs = Seq(A,B,C,D)
+    typDefs.foreach { tDef =>
+      val ser2 = TypesSerialization.toJson(tDef, true)
+      val typesDef2 = TypesSerialization.fromJson(ser2)
+      Assert.assertEquals(tDef, typesDef2.traitTypes(0))
+
+    }
+  }
+
+  @Test def test5 : Unit = {
+    val e1 = new EnumTypeDefinition("HiveObjectType",
+      new EnumValue("GLOBAL", 1),
+      new EnumValue("DATABASE", 2),
+      new EnumValue("TABLE", 3),
+      new EnumValue("PARTITION", 4),
+      new EnumValue("COLUMN", 5))
+
+    val e2 = new EnumTypeDefinition("PrincipalType",
+      new EnumValue("USER", 1),
+      new EnumValue("ROLE", 2),
+      new EnumValue("GROUP", 3))
+
+    val e3 = new EnumTypeDefinition("TxnState",
+      new EnumValue("COMMITTED", 1),
+      new EnumValue("ABORTED", 2),
+      new EnumValue("OPEN", 3))
+
+    val e4 = new EnumTypeDefinition("LockLevel",
+      new EnumValue("DB", 1),
+      new EnumValue("TABLE", 2),
+      new EnumValue("PARTITION", 3))
+
+    val typDefs = Seq(e1,e2,e3,e4)
+    typDefs.foreach { tDef =>
+      val ser2 = TypesSerialization.toJson(tDef)
+      val typesDef2 = TypesSerialization.fromJson(ser2)
+      Assert.assertEquals(tDef, typesDef2.enumTypes(0))
+
+    }
+  }
+
+  @Test def test6 : Unit = {
+    val typDef = createClassTypeDef("t4", List(),
+      requiredAttr("a", DataTypes.INT_TYPE),
+      optionalAttr("b", DataTypes.BOOLEAN_TYPE),
+      optionalAttr("c", DataTypes.BYTE_TYPE),
+      optionalAttr("d", DataTypes.SHORT_TYPE),
+      optionalAttr("enum1", "HiveObjectType"),
+      optionalAttr("e", DataTypes.INT_TYPE),
+      optionalAttr("f", DataTypes.INT_TYPE),
+      optionalAttr("g", DataTypes.LONG_TYPE),
+      optionalAttr("enum2", "PrincipalType"),
+      optionalAttr("h", DataTypes.FLOAT_TYPE),
+      optionalAttr("i", DataTypes.DOUBLE_TYPE),
+      optionalAttr("j", DataTypes.BIGINTEGER_TYPE),
+      optionalAttr("k", DataTypes.BIGDECIMAL_TYPE),
+      optionalAttr("enum3", "TxnState"),
+      optionalAttr("l", DataTypes.DATE_TYPE),
+      optionalAttr("m", DataTypes.INT_TYPE),
+      optionalAttr("n", DataTypes.BIGDECIMAL_TYPE),
+      optionalAttr("o", DataTypes.mapTypeName(DataTypes.STRING_TYPE, DataTypes.DOUBLE_TYPE)),
+      optionalAttr("enum4", "LockLevel"))
+
+    val deptTypeDef: HierarchicalTypeDefinition[ClassType] = createClassTypeDef("Department", List(),
+      requiredAttr("name", DataTypes.STRING_TYPE),
+      new AttributeDefinition("employees", String.format("array<%s>", "Person"),
+        Multiplicity.COLLECTION, true, "department"))
+    val personTypeDef: HierarchicalTypeDefinition[ClassType] = createClassTypeDef("Person", List(),
+      requiredAttr("name", DataTypes.STRING_TYPE),
+      new AttributeDefinition("department", "Department", Multiplicity.REQUIRED, false, "employees"),
+      new AttributeDefinition("manager", "Manager", Multiplicity.OPTIONAL, false, "subordinates")
+    )
+    val managerTypeDef: HierarchicalTypeDefinition[ClassType] = createClassTypeDef("Manager", List("Person"),
+      new AttributeDefinition("subordinates", String.format("array<%s>", "Person"),
+        Multiplicity.COLLECTION, false, "manager")
+    )
+
+    val typDefs = Seq(typDef, deptTypeDef, personTypeDef, managerTypeDef)
+    typDefs.foreach { tDef =>
+      val ser2 = TypesSerialization.toJson(tDef, false)
+      val typesDef2 = TypesSerialization.fromJson(ser2)
+      Assert.assertEquals(tDef, typesDef2.classTypes(0))
+
+    }
+  }
 }