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Avro: Support default values for generic data (#11786)
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187 changes: 187 additions & 0 deletions
187
core/src/main/java/org/apache/iceberg/data/avro/PlannedDataReader.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,187 @@ | ||
| /* | ||
| * 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.data.avro; | ||
|
|
||
| import java.io.IOException; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.function.Supplier; | ||
| import org.apache.avro.LogicalType; | ||
| import org.apache.avro.LogicalTypes; | ||
| import org.apache.avro.Schema; | ||
| import org.apache.avro.io.DatumReader; | ||
| import org.apache.avro.io.Decoder; | ||
| import org.apache.iceberg.avro.AvroSchemaUtil; | ||
| import org.apache.iceberg.avro.AvroWithPartnerVisitor; | ||
| import org.apache.iceberg.avro.SupportsRowPosition; | ||
| import org.apache.iceberg.avro.ValueReader; | ||
| import org.apache.iceberg.avro.ValueReaders; | ||
| import org.apache.iceberg.relocated.com.google.common.collect.ImmutableMap; | ||
| import org.apache.iceberg.types.Type; | ||
| import org.apache.iceberg.types.Types; | ||
| import org.apache.iceberg.util.Pair; | ||
|
|
||
| public class PlannedDataReader<T> implements DatumReader<T>, SupportsRowPosition { | ||
|
|
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| public static <D> PlannedDataReader<D> create(org.apache.iceberg.Schema expectedSchema) { | ||
| return create(expectedSchema, ImmutableMap.of()); | ||
| } | ||
|
|
||
| public static <D> PlannedDataReader<D> create( | ||
| org.apache.iceberg.Schema expectedSchema, Map<Integer, ?> idToConstant) { | ||
| return new PlannedDataReader<>(expectedSchema, idToConstant); | ||
| } | ||
|
|
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| private final org.apache.iceberg.Schema expectedSchema; | ||
| private final Map<Integer, ?> idToConstant; | ||
| private ValueReader<T> reader; | ||
|
|
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| protected PlannedDataReader( | ||
| org.apache.iceberg.Schema expectedSchema, Map<Integer, ?> idToConstant) { | ||
| this.expectedSchema = expectedSchema; | ||
| this.idToConstant = idToConstant; | ||
| } | ||
|
|
||
| @Override | ||
| @SuppressWarnings("unchecked") | ||
| public void setSchema(Schema fileSchema) { | ||
| this.reader = | ||
| (ValueReader<T>) | ||
| AvroWithPartnerVisitor.visit( | ||
| expectedSchema.asStruct(), | ||
| fileSchema, | ||
| new ReadBuilder(idToConstant), | ||
| AvroWithPartnerVisitor.FieldIDAccessors.get()); | ||
| } | ||
|
|
||
| @Override | ||
| public T read(T reuse, Decoder decoder) throws IOException { | ||
| return reader.read(decoder, reuse); | ||
| } | ||
|
|
||
| @Override | ||
| public void setRowPositionSupplier(Supplier<Long> posSupplier) { | ||
| if (reader instanceof SupportsRowPosition) { | ||
| ((SupportsRowPosition) reader).setRowPositionSupplier(posSupplier); | ||
| } | ||
| } | ||
|
|
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| private static class ReadBuilder extends AvroWithPartnerVisitor<Type, ValueReader<?>> { | ||
| private final Map<Integer, ?> idToConstant; | ||
|
|
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| private ReadBuilder(Map<Integer, ?> idToConstant) { | ||
| this.idToConstant = idToConstant; | ||
| } | ||
|
|
||
| @Override | ||
| public ValueReader<?> record(Type partner, Schema record, List<ValueReader<?>> fieldReaders) { | ||
| if (partner == null) { | ||
| return ValueReaders.skipStruct(fieldReaders); | ||
| } | ||
|
|
||
| Types.StructType expected = partner.asStructType(); | ||
| List<Pair<Integer, ValueReader<?>>> readPlan = | ||
| ValueReaders.buildReadPlan(expected, record, fieldReaders, idToConstant); | ||
|
|
||
| return GenericReaders.struct(readPlan, expected); | ||
| } | ||
|
|
||
| @Override | ||
| public ValueReader<?> union(Type partner, Schema union, List<ValueReader<?>> options) { | ||
| return ValueReaders.union(options); | ||
| } | ||
|
|
||
| @Override | ||
| public ValueReader<?> array(Type ignored, Schema array, ValueReader<?> elementReader) { | ||
| return ValueReaders.array(elementReader); | ||
| } | ||
|
|
||
| @Override | ||
| public ValueReader<?> arrayMap( | ||
| Type ignored, Schema map, ValueReader<?> keyReader, ValueReader<?> valueReader) { | ||
| return ValueReaders.arrayMap(keyReader, valueReader); | ||
| } | ||
|
|
||
| @Override | ||
| public ValueReader<?> map(Type ignored, Schema map, ValueReader<?> valueReader) { | ||
| return ValueReaders.map(ValueReaders.strings(), valueReader); | ||
| } | ||
|
|
||
| @Override | ||
| public ValueReader<?> primitive(Type partner, Schema primitive) { | ||
| LogicalType logicalType = primitive.getLogicalType(); | ||
| if (logicalType != null) { | ||
| switch (logicalType.getName()) { | ||
| case "date": | ||
| return GenericReaders.dates(); | ||
|
|
||
| case "time-micros": | ||
| return GenericReaders.times(); | ||
|
|
||
| case "timestamp-micros": | ||
| if (AvroSchemaUtil.isTimestamptz(primitive)) { | ||
| return GenericReaders.timestamptz(); | ||
| } | ||
| return GenericReaders.timestamps(); | ||
|
|
||
| case "decimal": | ||
| return ValueReaders.decimal( | ||
| ValueReaders.decimalBytesReader(primitive), | ||
| ((LogicalTypes.Decimal) logicalType).getScale()); | ||
|
|
||
| case "uuid": | ||
| return ValueReaders.uuids(); | ||
|
|
||
| default: | ||
| throw new IllegalArgumentException("Unknown logical type: " + logicalType); | ||
| } | ||
| } | ||
|
|
||
| switch (primitive.getType()) { | ||
| case NULL: | ||
| return ValueReaders.nulls(); | ||
| case BOOLEAN: | ||
| return ValueReaders.booleans(); | ||
| case INT: | ||
| if (partner != null && partner.typeId() == Type.TypeID.LONG) { | ||
| return ValueReaders.intsAsLongs(); | ||
| } | ||
| return ValueReaders.ints(); | ||
| case LONG: | ||
| return ValueReaders.longs(); | ||
| case FLOAT: | ||
| if (partner != null && partner.typeId() == Type.TypeID.DOUBLE) { | ||
| return ValueReaders.floatsAsDoubles(); | ||
| } | ||
| return ValueReaders.floats(); | ||
| case DOUBLE: | ||
| return ValueReaders.doubles(); | ||
| case STRING: | ||
| // might want to use a binary-backed container like Utf8 | ||
| return ValueReaders.strings(); | ||
| case FIXED: | ||
| return ValueReaders.fixed(primitive.getFixedSize()); | ||
| case BYTES: | ||
| return ValueReaders.byteBuffers(); | ||
| default: | ||
| throw new IllegalArgumentException("Unsupported type: " + primitive); | ||
| } | ||
| } | ||
| } | ||
| } |
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