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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.catalyst
import org.apache.spark.sql.catalyst.trees.TreeNode
/**
* Functions for attaching and retrieving trees that are associated with errors.
*/
package object errors {
class TreeNodeException[TreeType <: TreeNode[_]](
@transient val tree: TreeType,
msg: String,
cause: Throwable)
extends Exception(msg, cause) {
val treeString = tree.toString
// Yes, this is the same as a default parameter, but... those don't seem to work with SBT
// external project dependencies for some reason.
def this(tree: TreeType, msg: String) = this(tree, msg, null)
override def getMessage: String = {
s"${super.getMessage}, tree:${if (treeString contains "\n") "\n" else " "}$tree"
}
}
/**
* Wraps any exceptions that are thrown while executing `f` in a
* [[catalyst.errors.TreeNodeException TreeNodeException]], attaching the provided `tree`.
*/
def attachTree[TreeType <: TreeNode[_], A](tree: TreeType, msg: String = "")(f: => A): A = {
try f catch {
case e: Exception => throw new TreeNodeException(tree, msg, e)
}
}
}
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