| /* |
| * 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 |
| |
| import org.apache.griffin.measure.utils.TimeUtil |
| |
| trait LiteralExpr extends Expr { |
| def coalesceDesc: String = desc |
| } |
| |
| case class LiteralNullExpr(str: String) extends LiteralExpr { |
| def desc: String = "NULL" |
| } |
| |
| case class LiteralNanExpr(str: String) extends LiteralExpr { |
| def desc: String = "NaN" |
| } |
| |
| case class LiteralStringExpr(str: String) extends LiteralExpr { |
| def desc: String = str |
| } |
| |
| case class LiteralNumberExpr(str: String) extends LiteralExpr { |
| def desc: String = { |
| try { |
| if (str.contains(".")) { |
| str.toDouble.toString |
| } else { |
| str.toLong.toString |
| } |
| } catch { |
| case e: Throwable => throw new Exception(s"${str} is invalid number") |
| } |
| } |
| } |
| |
| case class LiteralTimeExpr(str: String) extends LiteralExpr { |
| def desc: String = { |
| TimeUtil.milliseconds(str) match { |
| case Some(t) => t.toString |
| case _ => throw new Exception(s"${str} is invalid time") |
| } |
| } |
| } |
| |
| case class LiteralBooleanExpr(str: String) extends LiteralExpr { |
| final val TrueRegex = """(?i)true""".r |
| final val FalseRegex = """(?i)false""".r |
| def desc: String = { |
| str match { |
| case TrueRegex() => true.toString |
| case FalseRegex() => false.toString |
| case _ => throw new Exception(s"${str} is invalid boolean") |
| } |
| } |
| } |