Bulk Load CDK: AirbyteType & AirbyteValue, marshaling from json

airbyte-cdk/bulk/core/load/src/main/kotlin/io/airbyte/cdk/command/DestinationCatalog.kt

@@ -12,9 +12,7 @@ import jakarta.inject.Singleton
  * Internal representation of destination streams. This is intended to be a case class specialized
  * for usability.
  */
-data class DestinationCatalog(
-    val streams: List<DestinationStream> = emptyList(),
-) {
+data class DestinationCatalog(val streams: List<DestinationStream> = emptyList()) {
     private val byDescriptor: Map<DestinationStream.Descriptor, DestinationStream> =
         streams.associateBy { it.descriptor }
 

airbyte-cdk/bulk/core/load/src/main/kotlin/io/airbyte/cdk/command/DestinationStream.kt

@@ -4,7 +4,9 @@
 
 package io.airbyte.cdk.command
 
-import com.fasterxml.jackson.databind.node.ObjectNode
+import io.airbyte.cdk.data.AirbyteType
+import io.airbyte.cdk.data.AirbyteTypeToJsonSchema
+import io.airbyte.cdk.data.JsonSchemaToAirbyteType
 import io.airbyte.protocol.models.v0.AirbyteStream
 import io.airbyte.protocol.models.v0.ConfiguredAirbyteStream
 import io.airbyte.protocol.models.v0.DestinationSyncMode
@@ -22,7 +24,7 @@ import jakarta.inject.Singleton
 data class DestinationStream(
     val descriptor: Descriptor,
     val importType: ImportType,
-    val schema: ObjectNode,
+    val schema: AirbyteType,
     val generationId: Long,
     val minimumGenerationId: Long,
     val syncId: Long,
@@ -44,7 +46,7 @@ data class DestinationStream(
                 AirbyteStream()
                     .withNamespace(descriptor.namespace)
                     .withName(descriptor.name)
-                    .withJsonSchema(schema)
+                    .withJsonSchema(AirbyteTypeToJsonSchema().convert(schema))
             )
             .withGenerationId(generationId)
             .withMinimumGenerationId(minimumGenerationId)
@@ -83,10 +85,10 @@ class DestinationStreamFactory {
                     DestinationSyncMode.APPEND_DEDUP ->
                         Dedupe(primaryKey = stream.primaryKey, cursor = stream.cursorField)
                 },
-            schema = stream.stream.jsonSchema as ObjectNode,
             generationId = stream.generationId,
             minimumGenerationId = stream.minimumGenerationId,
             syncId = stream.syncId,
+            schema = JsonSchemaToAirbyteType().convert(stream.stream.jsonSchema)
         )
     }
 }

airbyte-cdk/bulk/core/load/src/main/kotlin/io/airbyte/cdk/data/AirbyteType.kt

@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+ */
+
+package io.airbyte.cdk.data
+
+sealed interface AirbyteType
+
+data object NullType : AirbyteType
+
+data object StringType : AirbyteType
+
+data object BooleanType : AirbyteType
+
+data object IntegerType : AirbyteType
+
+data object NumberType : AirbyteType
+
+data object DateType : AirbyteType
+
+data class TimestampType(val hasTimezone: Boolean) : AirbyteType
+
+data class TimeType(val hasTimezone: Boolean) : AirbyteType
+
+data class ArrayType(val items: FieldType) : AirbyteType
+
+data object ArrayTypeWithoutSchema : AirbyteType
+
+data class ObjectType(val properties: LinkedHashMap<String, FieldType>) : AirbyteType
+
+data object ObjectTypeWithEmptySchema : AirbyteType
+
+data object ObjectTypeWithoutSchema : AirbyteType
+
+data class UnionType(val options: List<AirbyteType>) : AirbyteType
+
+data class UnknownType(val what: String) : AirbyteType
+
+data class FieldType(val type: AirbyteType, val nullable: Boolean)

airbyte-cdk/bulk/core/load/src/main/kotlin/io/airbyte/cdk/data/AirbyteTypeToJsonSchema.kt

@@ -0,0 +1,79 @@
+/*
+ * Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+ */
+
+package io.airbyte.cdk.data
+
+import com.fasterxml.jackson.databind.JsonNode
+import com.fasterxml.jackson.databind.node.JsonNodeFactory
+import com.fasterxml.jackson.databind.node.ObjectNode
+
+class AirbyteTypeToJsonSchema {
+    private fun ofType(typeName: String): ObjectNode {
+        return JsonNodeFactory.instance.objectNode().put("type", typeName)
+    }
+
+    fun convert(airbyteType: AirbyteType): JsonNode {
+        return when (airbyteType) {
+            is NullType -> ofType("null")
+            is StringType -> ofType("string")
+            is BooleanType -> ofType("boolean")
+            is IntegerType -> ofType("integer")
+            is NumberType -> ofType("number")
+            is ArrayType ->
+                JsonNodeFactory.instance
+                    .objectNode()
+                    .put("type", "array")
+                    .set("items", fromFieldType(airbyteType.items))
+            is ArrayTypeWithoutSchema -> ofType("array")
+            is ObjectType -> {
+                val objNode = ofType("object")
+                val properties = objNode.putObject("properties")
+                airbyteType.properties.forEach { (name, field) ->
+                    properties.replace(name, fromFieldType(field))
+                }
+                objNode
+            }
+            is ObjectTypeWithoutSchema -> ofType("object")
+            is ObjectTypeWithEmptySchema -> {
+                val objectNode = ofType("object")
+                objectNode.putObject("properties")
+                objectNode
+            }
+            is UnionType -> {
+                val unionNode = JsonNodeFactory.instance.objectNode()
+                val unionOptions = unionNode.putArray("oneOf")
+                airbyteType.options.forEach { unionOptions.add(convert(it)) }
+                unionNode
+            }
+            is DateType -> ofType("string").put("format", "date")
+            is TimeType -> {
+                val timeNode = ofType("string").put("format", "time")
+                if (airbyteType.hasTimezone) {
+                    timeNode.put("airbyte_type", "time_with_timezone")
+                } else {
+                    timeNode.put("airbyte_type", "time_without_timezone")
+                }
+            }
+            is TimestampType -> {
+                val timestampNode = ofType("string").put("format", "date-time")
+                if (airbyteType.hasTimezone) {
+                    timestampNode.put("airbyte_type", "timestamp_with_timezone")
+                } else {
+                    timestampNode.put("airbyte_type", "timestamp_without_timezone")
+                }
+            }
+            else -> throw IllegalArgumentException("Unknown type: $airbyteType")
+        }
+    }
+
+    private fun fromFieldType(field: FieldType): JsonNode {
+        if (field.nullable) {
+            if (field.type is UnionType) {
+                return convert(UnionType(options = field.type.options + NullType))
+            }
+            return convert(UnionType(options = listOf(field.type, NullType)))
+        }
+        return convert(field.type)
+    }
+}

airbyte-cdk/bulk/core/load/src/main/kotlin/io/airbyte/cdk/data/AirbyteValue.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+ */
+
+package io.airbyte.cdk.data
+
+import java.math.BigDecimal
+
+sealed interface AirbyteValue
+
+data object NullValue : AirbyteValue
+
+@JvmInline value class StringValue(val value: String) : AirbyteValue
+
+@JvmInline value class BooleanValue(val value: Boolean) : AirbyteValue
+
+@JvmInline value class IntegerValue(val value: Long) : AirbyteValue
+
+@JvmInline value class NumberValue(val value: BigDecimal) : AirbyteValue
+
+@JvmInline value class DateValue(val value: String) : AirbyteValue
+
+@JvmInline value class TimestampValue(val value: String) : AirbyteValue
+
+@JvmInline value class TimeValue(val value: String) : AirbyteValue
+
+@JvmInline value class ArrayValue(val values: List<AirbyteValue>) : AirbyteValue
+
+@JvmInline value class ObjectValue(val values: LinkedHashMap<String, AirbyteValue>) : AirbyteValue
+
+@JvmInline value class UnknownValue(val what: String) : AirbyteValue

airbyte-cdk/bulk/core/load/src/main/kotlin/io/airbyte/cdk/data/AirbyteValueToJson.kt

@@ -0,0 +1,31 @@
+/*
+ * Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+ */
+
+package io.airbyte.cdk.data
+
+import com.fasterxml.jackson.databind.JsonNode
+import com.fasterxml.jackson.databind.node.JsonNodeFactory
+
+class AirbyteValueToJson {
+    fun convert(value: AirbyteValue): JsonNode {
+        return when (value) {
+            is ArrayValue ->
+                JsonNodeFactory.instance.arrayNode().addAll(value.values.map { convert(it) })
+            is BooleanValue -> JsonNodeFactory.instance.booleanNode(value.value)
+            is DateValue -> JsonNodeFactory.instance.textNode(value.value)
+            is IntegerValue -> JsonNodeFactory.instance.numberNode(value.value)
+            is NullValue -> JsonNodeFactory.instance.nullNode()
+            is NumberValue -> JsonNodeFactory.instance.numberNode(value.value)
+            is ObjectValue -> {
+                val objNode = JsonNodeFactory.instance.objectNode()
+                value.values.forEach { (name, field) -> objNode.replace(name, convert(field)) }
+                objNode
+            }
+            is StringValue -> JsonNodeFactory.instance.textNode(value.value)
+            is TimeValue -> JsonNodeFactory.instance.textNode(value.value)
+            is TimestampValue -> JsonNodeFactory.instance.textNode(value.value)
+            is UnknownValue -> throw IllegalArgumentException("Unknown value: $value")
+        }
+    }
+}

airbyte-cdk/bulk/core/load/src/main/kotlin/io/airbyte/cdk/data/JsonSchemaToAirbyteType.kt

@@ -0,0 +1,162 @@
+/*
+ * Copyright (c) 2024 Airbyte, Inc., all rights reserved.
+ */
+
+package io.airbyte.cdk.data
+
+import com.fasterxml.jackson.databind.JsonNode
+import com.fasterxml.jackson.databind.node.JsonNodeFactory
+import com.fasterxml.jackson.databind.node.ObjectNode
+
+class JsonSchemaToAirbyteType {
+    fun convert(schema: JsonNode): AirbyteType {
+        // try {
+        if (schema.isObject && schema.has("type")) {
+            // Normal json object with {"type": ..., ...}
+            val schemaType = (schema as ObjectNode).get("type")
+            return if (schemaType.isTextual) {
+                // {"type": <string>, ...}
+                when (schema.get("type").asText()) {
+                    "string" -> fromString(schema)
+                    "boolean" -> BooleanType
+                    "integer" -> IntegerType
+                    "number" -> fromNumber(schema)
+                    "array" -> fromArray(schema)
+                    "object" -> fromObject(schema)
+                    "null" -> NullType
+                    else ->
+                        throw IllegalArgumentException(
+                            "Unknown type: ${
+                                    schema.get("type").asText()
+                                }"
+                        )
+                }
+            } else if (schemaType.isArray) {
+                // {"type": [...], ...}
+                unionFromCombinedTypes(schemaType.toList(), schema)
+            } else {
+                UnknownType("unspported type for 'type' field: $schemaType")
+            }
+        } else if (schema.isObject) {
+            // {"oneOf": [...], ...} or {"anyOf": [...], ...} or {"allOf": [...], ...}
+            val options = schema.get("oneOf") ?: schema.get("anyOf") ?: schema.get("allOf")
+            return if (options != null) {
+                UnionType(options.map { convert(it as ObjectNode) })
+            } else {
+                // Default to object if no type and not a union type
+                convert((schema as ObjectNode).put("type", "object"))
+            }
+        } else if (schema.isTextual) {
+            // "<typename>"
+            val typeSchema = JsonNodeFactory.instance.objectNode().put("type", schema.asText())
+            return convert(typeSchema)
+        } else {
+            return UnknownType("Unknown schema type: $schema")
+        }
+    } // catch (t: Throwable) {
+    //  return UnknownType(t.message ?: "Unknown error")
+    // }
+    // }
+
+    private fun fromString(schema: ObjectNode): AirbyteType =
+        when (schema.get("format")?.asText()) {
+            "date" -> DateType
+            "time" ->
+                TimeType(
+                    hasTimezone = schema.get("airbyte_type")?.asText() != "time_without_timezone"
+                )
+            "date-time" ->
+                TimestampType(
+                    hasTimezone =
+                        schema.get("airbyte_type")?.asText() != "timestamp_without_timezone"
+                )
+            null -> StringType
+            else ->
+                throw IllegalArgumentException(
+                    "Unknown string format: ${
+                    schema.get("format").asText()
+                }"
+                )
+        }
+
+    private fun fromNumber(schema: ObjectNode): AirbyteType =
+        if (schema.get("airbyte_type")?.asText() == "integer") {
+            IntegerType
+        } else {
+            NumberType
+        }
+
+    private fun fromArray(schema: ObjectNode): AirbyteType {
+        val items = schema.get("items") ?: return ArrayTypeWithoutSchema
+        if (items.isArray) {
+            if (items.isEmpty) {
+                return ArrayTypeWithoutSchema
+            }
+            val itemOptions = UnionType(items.map { convert(it) })
+            return ArrayType(fieldFromUnion(itemOptions))
+        }
+        return ArrayType(fieldFromSchema(items as ObjectNode))
+    }
+
+    private fun fromObject(schema: ObjectNode): AirbyteType {
+        val properties = schema.get("properties") ?: return ObjectTypeWithoutSchema
+        if (properties.isEmpty) {
+            return ObjectTypeWithEmptySchema
+        }
+        val requiredFields = schema.get("required")?.map { it.asText() } ?: emptyList()
+        return objectFromProperties(properties as ObjectNode, requiredFields)
+    }
+
+    private fun fieldFromSchema(
+        fieldSchema: ObjectNode,
+        onRequiredList: Boolean = false
+    ): FieldType {
+        val markedRequired = fieldSchema.get("required")?.asBoolean() ?: false
+        val nullable = !(onRequiredList || markedRequired)
+        val airbyteType = convert(fieldSchema)
+        if (airbyteType is UnionType) {
+            return fieldFromUnion(airbyteType, nullable)
+        } else {
+            return FieldType(airbyteType, nullable)
+        }
+    }
+
+    private fun fieldFromUnion(unionType: UnionType, nullable: Boolean = false): FieldType {
+        if (unionType.options.contains(NullType)) {
+            val filtered = unionType.options.filter { it != NullType }
+            return FieldType(UnionType(filtered), nullable = true)
+        }
+        return FieldType(unionType, nullable = nullable)
+    }
+
+    private fun objectFromProperties(schema: ObjectNode, requiredFields: List<String>): ObjectType {
+        val properties =
+            schema
+                .fields()
+                .asSequence()
+                .map { (name, node) ->
+                    name to fieldFromSchema(node as ObjectNode, requiredFields.contains(name))
+                }
+                .toMap(LinkedHashMap())
+        return ObjectType(properties)
+    }
+
+    private fun unionFromCombinedTypes(
+        options: List<JsonNode>,
+        parentSchema: ObjectNode
+    ): UnionType {
+        // Denormalize the properties across each type (the converter only checks what matters
+        // per type).
+        val unionOptions =
+            options.map {
+                if (it.isTextual) {
+                    val schema = parentSchema.deepCopy()
+                    schema.put("type", it.textValue())
+                    convert(schema)
+                } else {
+                    convert(it)
+                }
+            }
+        return UnionType(unionOptions)
+    }
+}