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59 changes: 59 additions & 0 deletions
59
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/UDTRegistry.scala
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package org.apache.spark.sql.catalyst | ||
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| import org.apache.spark.sql.catalyst.annotation.UserDefinedType | ||
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| import scala.collection.mutable | ||
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| import org.apache.spark.sql.catalyst.types.UserDefinedTypeType | ||
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| import scala.reflect.runtime.universe._ | ||
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| /** | ||
| * Global registry for user-defined types (UDTs). | ||
| */ | ||
| private[sql] object UDTRegistry { | ||
| /** Map: UserType --> UserDefinedType */ | ||
| val udtRegistry = new mutable.HashMap[Any, UserDefinedTypeType[_]]() | ||
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| /** | ||
| * Register a user-defined type and its serializer, to allow automatic conversion between | ||
| * RDDs of user types and SchemaRDDs. | ||
| * Fails if this type has been registered already. | ||
| */ | ||
| /* | ||
| def registerType[UserType](implicit userType: TypeTag[UserType]): Unit = { | ||
| // TODO: Check to see if type is built-in. Throw exception? | ||
| val udt: UserDefinedTypeType[_] = | ||
| userType.getClass.getAnnotation(classOf[UserDefinedType]).udt().newInstance() | ||
| UDTRegistry.udtRegistry(userType.tpe) = udt | ||
| }*/ | ||
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| def registerType[UserType](implicit userType: Type): Unit = { | ||
| // TODO: Check to see if type is built-in. Throw exception? | ||
| if (!UDTRegistry.udtRegistry.contains(userType)) { | ||
| val udt: UserDefinedTypeType[_] = | ||
| userType.getClass.getAnnotation(classOf[UserDefinedType]).udt().newInstance() | ||
| UDTRegistry.udtRegistry(userType) = udt | ||
| } | ||
| // TODO: Else: Should we check (assert) that udt is the same as what is in the registry? | ||
| } | ||
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| //def getUDT | ||
| } |
32 changes: 32 additions & 0 deletions
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/annotation/UserDefinedType.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one or more | ||
| * contributor license agreements. See the NOTICE file distributed with | ||
| * this work for additional information regarding copyright ownership. | ||
| * The ASF licenses this file to You under the Apache License, Version 2.0 | ||
| * (the "License"); you may not use this file except in compliance with | ||
| * the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package org.apache.spark.sql.catalyst.annotation; | ||
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| import org.apache.spark.sql.catalyst.types.UserDefinedTypeType; | ||
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| import java.lang.annotation.*; | ||
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| /** | ||
| * A user-defined type which can be automatically recognized by a SQLContext and registered. | ||
| */ | ||
| // TODO: Should I used @Documented ? | ||
| @Retention(RetentionPolicy.RUNTIME) | ||
| @Target(ElementType.TYPE) | ||
| public @interface UserDefinedType { | ||
| Class<? extends UserDefinedTypeType<?> > udt(); | ||
| } |
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