/*
 * 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.flink.source.reader;

import org.apache.iceberg.CombinedScanTask;
import org.apache.iceberg.encryption.EncryptionManager;
import org.apache.iceberg.flink.source.DataIterator;
import org.apache.iceberg.flink.source.FileScanTaskReader;
import org.apache.iceberg.io.FileIO;
import org.apache.iceberg.relocated.com.google.common.base.Preconditions;

class LimitableDataIterator<T> extends DataIterator<T> {
  private final RecordLimiter limiter;

  LimitableDataIterator(
      FileScanTaskReader<T> fileScanTaskReader,
      CombinedScanTask task,
      FileIO io,
      EncryptionManager encryption,
      RecordLimiter limiter) {
    super(fileScanTaskReader, task, io, encryption);
    Preconditions.checkArgument(limiter != null, "Invalid record limiter: null");
    this.limiter = limiter;
  }

  @Override
  public boolean hasNext() {
    if (limiter.reachedLimit()) {
      return false;
    }

    return super.hasNext();
  }

  @Override
  public T next() {
    limiter.increment();
    return super.next();
  }
}
