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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.
*/
package org.apache.spark.sql.hive.thriftserver
private[hive] object ReflectionUtils {
def setSuperField(obj : Object, fieldName: String, fieldValue: Object) {
setAncestorField(obj, 1, fieldName, fieldValue)
}
def setAncestorField(obj: AnyRef, level: Int, fieldName: String, fieldValue: AnyRef) {
val ancestor = Iterator.iterate[Class[_]](obj.getClass)(_.getSuperclass).drop(level).next()
val field = ancestor.getDeclaredField(fieldName)
field.setAccessible(true)
field.set(obj, fieldValue)
}
def getSuperField[T](obj: AnyRef, fieldName: String): T = {
getAncestorField[T](obj, 1, fieldName)
}
def getAncestorField[T](clazz: Object, level: Int, fieldName: String): T = {
val ancestor = Iterator.iterate[Class[_]](clazz.getClass)(_.getSuperclass).drop(level).next()
val field = ancestor.getDeclaredField(fieldName)
field.setAccessible(true)
field.get(clazz).asInstanceOf[T]
}
def invokeStatic(clazz: Class[_], methodName: String, args: (Class[_], AnyRef)*): AnyRef = {
invoke(clazz, null, methodName, args: _*)
}
def invoke(
clazz: Class[_],
obj: AnyRef,
methodName: String,
args: (Class[_], AnyRef)*): AnyRef = {
val (types, values) = args.unzip
val method = clazz.getDeclaredMethod(methodName, types: _*)
method.setAccessible(true)
method.invoke(obj, values.toSeq: _*)
}
}
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