com.mongodb.spark.sql.MongoInferSchemaJava Maven / Gradle / Ivy
/*
* Copyright 2016 MongoDB, Inc.
*
* Licensed 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.
*/
package com.mongodb.spark.sql;
import org.apache.spark.sql.catalyst.JavaTypeInference;
import org.apache.spark.sql.types.StructType;
/**
* A helper for inferring the schema from Java
*
* In Spark 2.2.0 calling this method from Scala 2.10 caused compilation errors with the shadowed library in
* `JavaTypeInference`. Moving it into Java stops Scala falling over and allows it to continue to work.
*
* See: SPARK-126
*/
final class MongoInferSchemaJava {
@SuppressWarnings("unchecked")
public static StructType reflectSchema(final Class beanClass) {
return (StructType) JavaTypeInference.inferDataType(beanClass)._1();
}
}