| /* |
| * 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.sysds.runtime.matrix.operators; |
| |
| import org.apache.sysds.runtime.functionobjects.CM; |
| import org.apache.sysds.runtime.functionobjects.ValueFunction; |
| |
| public class CMOperator extends Operator |
| { |
| |
| private static final long serialVersionUID = 4126894676505115420L; |
| |
| // supported aggregates |
| public enum AggregateOperationTypes { |
| SUM, |
| COUNT, |
| MEAN, //a.k.a. CM |
| CM2, |
| CM3, |
| CM4, |
| VARIANCE, |
| INVALID |
| } |
| |
| public ValueFunction fn; |
| public AggregateOperationTypes aggOpType; |
| |
| public CMOperator(ValueFunction op, AggregateOperationTypes agg) { |
| super(true); |
| fn = op; |
| aggOpType = agg; |
| } |
| |
| public AggregateOperationTypes getAggOpType() { |
| return aggOpType; |
| } |
| |
| public CMOperator setCMAggOp(int order) { |
| AggregateOperationTypes agg = getCMAggOpType(order); |
| ValueFunction fn = CM.getCMFnObject(aggOpType); |
| return new CMOperator(fn, agg); |
| } |
| |
| public static AggregateOperationTypes getCMAggOpType ( int order ) { |
| if ( order == 2 ) |
| return AggregateOperationTypes.CM2; |
| else if ( order == 3 ) |
| return AggregateOperationTypes.CM3; |
| else if ( order == 4 ) |
| return AggregateOperationTypes.CM4; |
| else if( order == 0)//this is a special case to handel weighted mean |
| return AggregateOperationTypes.MEAN; |
| else |
| return AggregateOperationTypes.INVALID; |
| } |
| |
| public static AggregateOperationTypes getAggOpType(String fn, String order) { |
| if (fn.equalsIgnoreCase("count")) { |
| return AggregateOperationTypes.COUNT; |
| } else if (fn.equalsIgnoreCase("sum")) { |
| return AggregateOperationTypes.SUM; |
| } else if (fn.equalsIgnoreCase("mean")) { |
| return AggregateOperationTypes.MEAN; |
| } else if (fn.equalsIgnoreCase("variance")) { |
| return AggregateOperationTypes.VARIANCE; |
| } else if (fn.equalsIgnoreCase("centralmoment")) { |
| // in case of centralmoment, find aggIo by order |
| if ( order == null ) |
| return AggregateOperationTypes.INVALID; |
| |
| if (order.equalsIgnoreCase("2")) |
| return AggregateOperationTypes.CM2; |
| else if (order.equalsIgnoreCase("3")) |
| return AggregateOperationTypes.CM3; |
| else if (order.equalsIgnoreCase("4")) |
| return AggregateOperationTypes.CM4; |
| else |
| return AggregateOperationTypes.INVALID; |
| } |
| return AggregateOperationTypes.INVALID; |
| } |
| |
| public boolean isPartialAggregateOperator() |
| { |
| boolean ret = false; |
| |
| switch( aggOpType ) |
| { |
| case COUNT: |
| case MEAN: |
| ret = true; break; |
| |
| //NOTE: the following aggregation operators are not marked for partial aggregation |
| //because they required multiple intermediate values and hence do not apply to the |
| //grouped aggregate combiner which needs to work on value/weight pairs only. |
| case CM2: |
| case CM3: |
| case CM4: |
| case VARIANCE: |
| ret = false; break; |
| |
| default: |
| //do nothing |
| } |
| |
| return ret; |
| } |
| } |