| /* |
| 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.griffin.measure.configuration.dqdefinition.reader |
| |
| import scala.reflect.ClassTag |
| import scala.util.Try |
| |
| import org.apache.griffin.measure.configuration.dqdefinition.Param |
| import org.apache.griffin.measure.utils.{HdfsUtil, JsonUtil} |
| |
| |
| |
| /** |
| * read params from config file path |
| * |
| * @param filePath: hdfs path ("hdfs://cluster-name/path") |
| * local file path ("file:///path") |
| * relative file path ("relative/path") |
| */ |
| case class ParamFileReader(filePath: String) extends ParamReader { |
| |
| def readConfig[T <: Param](implicit m : ClassTag[T]): Try[T] = { |
| Try { |
| val source = HdfsUtil.openFile(filePath) |
| val param = JsonUtil.fromJson[T](source) |
| source.close |
| validate(param) |
| } |
| } |
| |
| } |