| /* |
| * 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.iceberg; |
| |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| import java.util.stream.Stream; |
| import org.apache.iceberg.relocated.com.google.common.base.Preconditions; |
| import org.apache.iceberg.relocated.com.google.common.collect.Maps; |
| |
| public class MetricsUtil { |
| |
| private MetricsUtil() { |
| } |
| |
| /** |
| * Construct mapping relationship between column id to NaN value counts from input metrics and metrics config. |
| */ |
| public static Map<Integer, Long> createNanValueCounts( |
| Stream<FieldMetrics> fieldMetrics, MetricsConfig metricsConfig, Schema inputSchema) { |
| Preconditions.checkNotNull(metricsConfig, "metricsConfig is required"); |
| |
| if (fieldMetrics == null || inputSchema == null) { |
| return Maps.newHashMap(); |
| } |
| |
| return fieldMetrics |
| .filter(metrics -> metricsMode(inputSchema, metricsConfig, metrics.id()) != MetricsModes.None.get()) |
| .collect(Collectors.toMap(FieldMetrics::id, FieldMetrics::nanValueCount)); |
| } |
| |
| /** |
| * Extract MetricsMode for the given field id from metrics config. |
| */ |
| public static MetricsModes.MetricsMode metricsMode(Schema inputSchema, MetricsConfig metricsConfig, int fieldId) { |
| Preconditions.checkNotNull(inputSchema, "inputSchema is required"); |
| Preconditions.checkNotNull(metricsConfig, "metricsConfig is required"); |
| |
| String columnName = inputSchema.findColumnName(fieldId); |
| return metricsConfig.columnMode(columnName); |
| } |
| |
| } |