| /* |
| * 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.expr |
| |
| trait MathExpr extends Expr {} |
| |
| case class MathFactorExpr(factor: Expr, withBracket: Boolean, aliasOpt: Option[String]) |
| extends MathExpr |
| with AliasableExpr { |
| |
| addChild(factor) |
| |
| def desc: String = if (withBracket) s"(${factor.desc})" else factor.desc |
| def coalesceDesc: String = factor.coalesceDesc |
| def alias: Option[String] = aliasOpt |
| override def extractSelf: Expr = { |
| if (aliasOpt.nonEmpty) this |
| else factor.extractSelf |
| } |
| |
| override def map(func: Expr => Expr): MathFactorExpr = { |
| MathFactorExpr(func(factor), withBracket, aliasOpt) |
| } |
| } |
| |
| case class UnaryMathExpr(oprs: Seq[String], factor: MathExpr) extends MathExpr { |
| |
| addChild(factor) |
| |
| def desc: String = { |
| oprs.foldRight(factor.desc) { (opr, fac) => |
| s"($opr$fac)" |
| } |
| } |
| def coalesceDesc: String = { |
| oprs.foldRight(factor.coalesceDesc) { (opr, fac) => |
| s"($opr$fac)" |
| } |
| } |
| override def extractSelf: Expr = { |
| if (oprs.nonEmpty) this |
| else factor.extractSelf |
| } |
| |
| override def map(func: Expr => Expr): UnaryMathExpr = { |
| UnaryMathExpr(oprs, func(factor).asInstanceOf[MathExpr]) |
| } |
| } |
| |
| case class BinaryMathExpr(factor: MathExpr, tails: Seq[(String, MathExpr)]) extends MathExpr { |
| |
| addChildren(factor +: tails.map(_._2)) |
| |
| def desc: String = { |
| val res = tails.foldLeft(factor.desc) { (fac, tail) => |
| val (opr, expr) = tail |
| s"$fac $opr ${expr.desc}" |
| } |
| if (tails.size <= 0) res else s"$res" |
| } |
| def coalesceDesc: String = { |
| val res = tails.foldLeft(factor.coalesceDesc) { (fac, tail) => |
| val (opr, expr) = tail |
| s"$fac $opr ${expr.coalesceDesc}" |
| } |
| if (tails.size <= 0) res else s"$res" |
| } |
| override def extractSelf: Expr = { |
| if (tails.nonEmpty) this |
| else factor.extractSelf |
| } |
| |
| override def map(func: Expr => Expr): BinaryMathExpr = { |
| BinaryMathExpr(func(factor).asInstanceOf[MathExpr], tails.map { pair => |
| (pair._1, func(pair._2).asInstanceOf[MathExpr]) |
| }) |
| } |
| } |