| /* |
| * 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.context.streaming.metric |
| |
| /** |
| * accuracy metric |
| * @param miss miss count |
| * @param total total count |
| */ |
| case class AccuracyMetric(miss: Long, total: Long) extends Metric { |
| |
| type T = AccuracyMetric |
| |
| override def isLegal: Boolean = getTotal > 0 |
| |
| def update(delta: T): T = { |
| if (delta.miss < miss) AccuracyMetric(delta.miss, total) else this |
| } |
| |
| def initial(): Boolean = { |
| getMatch <= 0 |
| } |
| |
| def eventual(): Boolean = { |
| this.miss <= 0 |
| } |
| |
| def differsFrom(other: T): Boolean = { |
| (this.miss != other.miss) || (this.total != other.total) |
| } |
| |
| def getMiss: Long = miss |
| |
| def getTotal: Long = total |
| |
| def getMatch: Long = total - miss |
| |
| def matchFraction: Double = if (getTotal <= 0) 1 else getMatch.toDouble / getTotal |
| |
| def matchPercentage: Double = matchFraction * 100 |
| |
| } |