| /* |
| * 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.util; |
| |
| import java.util.Comparator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.function.Function; |
| import org.apache.iceberg.ManifestFile; |
| import org.apache.iceberg.PartitionSpec; |
| import org.apache.iceberg.StructLike; |
| import org.apache.iceberg.relocated.com.google.common.collect.Lists; |
| import org.apache.iceberg.types.Comparators; |
| import org.apache.iceberg.types.Conversions; |
| import org.apache.iceberg.types.Type; |
| import org.apache.iceberg.types.Types; |
| |
| public class ManifestFileUtil { |
| private ManifestFileUtil() { |
| } |
| |
| private static class FieldSummary<T> { |
| private final Comparator<T> comparator; |
| private final Class<T> javaClass; |
| private final T lowerBound; |
| private final T upperBound; |
| private final boolean containsNull; |
| |
| @SuppressWarnings("unchecked") |
| FieldSummary(Type.PrimitiveType primitive, ManifestFile.PartitionFieldSummary summary) { |
| this.comparator = Comparators.forType(primitive); |
| this.javaClass = (Class<T>) primitive.typeId().javaClass(); |
| this.lowerBound = Conversions.fromByteBuffer(primitive, summary.lowerBound()); |
| this.upperBound = Conversions.fromByteBuffer(primitive, summary.upperBound()); |
| this.containsNull = summary.containsNull(); |
| } |
| |
| boolean canContain(Object value) { |
| if (value == null) { |
| return containsNull; |
| } |
| |
| // if lower bound is null, then there are no non-null values |
| if (lowerBound == null) { |
| // the value is non-null, so it cannot match |
| return false; |
| } |
| |
| if (!javaClass.isInstance(value)) { |
| return false; |
| } |
| |
| T typedValue = javaClass.cast(value); |
| |
| if (comparator.compare(typedValue, lowerBound) < 0) { |
| return false; |
| } |
| |
| if (comparator.compare(typedValue, upperBound) > 0) { |
| return false; |
| } |
| |
| return true; |
| } |
| } |
| |
| private static boolean canContain(List<FieldSummary<?>> summaries, StructLike struct) { |
| if (struct.size() != summaries.size()) { |
| return false; |
| } |
| |
| // if any value is not contained, the struct is not contained and this can return early |
| for (int pos = 0; pos < summaries.size(); pos += 1) { |
| Object value = struct.get(pos, Object.class); |
| if (!summaries.get(pos).canContain(value)) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| public static boolean canContainAny(ManifestFile manifest, |
| Iterable<StructLike> partitions, |
| Function<Integer, PartitionSpec> specLookup) { |
| if (manifest.partitions() == null) { |
| return true; |
| } |
| |
| List<FieldSummary<?>> summaries = summaries(manifest, specLookup); |
| |
| for (StructLike partition : partitions) { |
| if (canContain(summaries, partition)) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| public static boolean canContainAny(ManifestFile manifest, |
| Iterable<Pair<Integer, StructLike>> partitions, |
| Map<Integer, PartitionSpec> specsById) { |
| if (manifest.partitions() == null) { |
| return true; |
| } |
| |
| List<FieldSummary<?>> summaries = summaries(manifest, specsById::get); |
| |
| for (Pair<Integer, StructLike> partition : partitions) { |
| if (partition.first() == manifest.partitionSpecId() && canContain(summaries, partition.second())) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| private static List<FieldSummary<?>> summaries(ManifestFile manifest, Function<Integer, PartitionSpec> specLookup) { |
| Types.StructType partitionType = specLookup.apply(manifest.partitionSpecId()).partitionType(); |
| List<ManifestFile.PartitionFieldSummary> fieldSummaries = manifest.partitions(); |
| List<Types.NestedField> fields = partitionType.fields(); |
| |
| List<FieldSummary<?>> summaries = Lists.newArrayListWithExpectedSize(fieldSummaries.size()); |
| for (int pos = 0; pos < fieldSummaries.size(); pos += 1) { |
| Type.PrimitiveType primitive = fields.get(pos).type().asPrimitiveType(); |
| summaries.add(new FieldSummary<>(primitive, fieldSummaries.get(pos))); |
| } |
| |
| return summaries; |
| } |
| } |