| /* |
| * 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.io.Serializable; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.function.Function; |
| import org.apache.iceberg.expressions.Expression; |
| import org.apache.iceberg.expressions.Expressions; |
| import org.apache.iceberg.io.CloseableIterable; |
| import org.apache.iceberg.io.InputFile; |
| import org.apache.iceberg.relocated.com.google.common.collect.ImmutableList; |
| import org.apache.iceberg.relocated.com.google.common.collect.Iterables; |
| import org.apache.iceberg.relocated.com.google.common.collect.Lists; |
| |
| class StaticDataTask implements DataTask { |
| |
| static <T> DataTask of(InputFile metadata, Iterable<T> values, Function<T, Row> transform) { |
| return new StaticDataTask(metadata, |
| Lists.newArrayList(Iterables.transform(values, transform::apply)).toArray(new Row[0])); |
| } |
| |
| private final DataFile metadataFile; |
| private final StructLike[] rows; |
| |
| private StaticDataTask(InputFile metadata, StructLike[] rows) { |
| this.metadataFile = DataFiles.builder(PartitionSpec.unpartitioned()) |
| .withInputFile(metadata) |
| .withRecordCount(rows.length) |
| .withFormat(FileFormat.METADATA) |
| .build(); |
| this.rows = rows; |
| } |
| |
| @Override |
| public List<DeleteFile> deletes() { |
| return ImmutableList.of(); |
| } |
| |
| @Override |
| public CloseableIterable<StructLike> rows() { |
| return CloseableIterable.withNoopClose(Arrays.asList(rows)); |
| } |
| |
| @Override |
| public DataFile file() { |
| return metadataFile; |
| } |
| |
| @Override |
| public PartitionSpec spec() { |
| return PartitionSpec.unpartitioned(); |
| } |
| |
| @Override |
| public long start() { |
| return 0; |
| } |
| |
| @Override |
| public long length() { |
| return metadataFile.fileSizeInBytes(); |
| } |
| |
| @Override |
| public Expression residual() { |
| return Expressions.alwaysTrue(); |
| } |
| |
| @Override |
| public Iterable<FileScanTask> split(long splitSize) { |
| return ImmutableList.of(this); |
| } |
| |
| /** |
| * Implements {@link StructLike#get} for passing static rows. |
| */ |
| static class Row implements StructLike, Serializable { |
| public static Row of(Object... values) { |
| return new Row(values); |
| } |
| |
| private final Object[] values; |
| |
| private Row(Object... values) { |
| this.values = values; |
| } |
| |
| @Override |
| public int size() { |
| return values.length; |
| } |
| |
| @Override |
| public <T> T get(int pos, Class<T> javaClass) { |
| return javaClass.cast(values[pos]); |
| } |
| |
| @Override |
| public <T> void set(int pos, T value) { |
| throw new UnsupportedOperationException("Setting values is not supported"); |
| } |
| } |
| } |