core/src/main/java/org/apache/iceberg/ManifestLists.java

/*
 * 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.IOException;
import java.util.List;
import org.apache.iceberg.avro.Avro;
import org.apache.iceberg.exceptions.RuntimeIOException;
import org.apache.iceberg.io.CloseableIterable;
import org.apache.iceberg.io.InputFile;
import org.apache.iceberg.io.OutputFile;
import org.apache.iceberg.relocated.com.google.common.base.Preconditions;
import org.apache.iceberg.relocated.com.google.common.collect.Lists;

class ManifestLists {
  private ManifestLists() {
  }

  static List<ManifestFile> read(InputFile manifestList) {
    try (CloseableIterable<ManifestFile> files = Avro.read(manifestList)
        .rename("manifest_file", GenericManifestFile.class.getName())
        .rename("partitions", GenericPartitionFieldSummary.class.getName())
        .rename("r508", GenericPartitionFieldSummary.class.getName())
        .classLoader(GenericManifestFile.class.getClassLoader())
        .project(ManifestFile.schema())
        .reuseContainers(false)
        .build()) {

      return Lists.newLinkedList(files);

    } catch (IOException e) {
      throw new RuntimeIOException(e, "Cannot read manifest list file: %s", manifestList.location());
    }
  }

  static ManifestListWriter write(int formatVersion, OutputFile manifestListFile,
                                  long snapshotId, Long parentSnapshotId, long sequenceNumber) {
    switch (formatVersion) {
      case 1:
        Preconditions.checkArgument(sequenceNumber == TableMetadata.INITIAL_SEQUENCE_NUMBER,
            "Invalid sequence number for v1 manifest list: %s", sequenceNumber);
        return new ManifestListWriter.V1Writer(manifestListFile, snapshotId, parentSnapshotId);
      case 2:
        return new ManifestListWriter.V2Writer(manifestListFile, snapshotId, parentSnapshotId, sequenceNumber);
    }
    throw new UnsupportedOperationException("Cannot write manifest list for table version: " + formatVersion);
  }
}