| /* |
| * 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.step.builder.dsl.transform.analyzer |
| |
| import org.apache.griffin.measure.step.builder.dsl.expr._ |
| |
| |
| case class CompletenessAnalyzer(expr: CompletenessClause, sourceName: String) |
| extends BasicAnalyzer { |
| |
| val seqAlias = (expr: Expr, v: Seq[String]) => { |
| expr match { |
| case apr: AliasableExpr => v ++ apr.alias |
| case _ => v |
| } |
| } |
| val combAlias = (a: Seq[String], b: Seq[String]) => a ++ b |
| |
| private val exprs = expr.exprs |
| private def genAlias(idx: Int): String = s"alias_${idx}" |
| val selectionPairs = exprs.zipWithIndex.map { pair => |
| val (pr, idx) = pair |
| val res = pr.preOrderTraverseDepthFirst(Seq[String]())(seqAlias, combAlias) |
| (pr, res.headOption.getOrElse(genAlias(idx))) |
| } |
| |
| if (selectionPairs.isEmpty) { |
| throw new Exception("completeness analyzer error: empty selection") |
| } |
| |
| } |