core/src/main/java/org/apache/iceberg/BaseTableScan.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 org.apache.iceberg.io.CloseableIterable;
import org.apache.iceberg.util.TableScanUtil;

/** Base class for {@link TableScan} implementations. */
abstract class BaseTableScan extends SnapshotScan<TableScan, FileScanTask, CombinedScanTask>
    implements TableScan {

  protected BaseTableScan(Table table, Schema schema, TableScanContext context) {
    super(table, schema, context);
  }

  @Override
  public TableScan appendsBetween(long fromSnapshotId, long toSnapshotId) {
    throw new UnsupportedOperationException("Incremental scan is not supported");
  }

  @Override
  public TableScan appendsAfter(long fromSnapshotId) {
    throw new UnsupportedOperationException("Incremental scan is not supported");
  }

  @Override
  public CloseableIterable<CombinedScanTask> planTasks() {
    CloseableIterable<FileScanTask> fileScanTasks = planFiles();
    CloseableIterable<FileScanTask> splitFiles =
        TableScanUtil.splitFiles(fileScanTasks, targetSplitSize());
    return TableScanUtil.planTasks(
        splitFiles, targetSplitSize(), splitLookback(), splitOpenFileCost());
  }
}