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apache iceberg support ks3

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/*
 * 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.ksyun.ks3;

import com.ksyun.ks3.service.Ks3;
import org.apache.iceberg.io.InputFile;
import org.apache.iceberg.io.SeekableInputStream;
import org.apache.iceberg.ksyun.KsyunProperties;

class Ks3InputFile extends BaseKs3File implements InputFile {

  public static Ks3InputFile fromLocation(String location, Ks3 client) {
    return new Ks3InputFile(client, new Ks3URI(location), new KsyunProperties());
  }

  public static Ks3InputFile fromLocation(String location, Ks3 client, KsyunProperties ksyunProperties) {
    return new Ks3InputFile(client, new Ks3URI(location), ksyunProperties);
  }

  Ks3InputFile(Ks3 client, Ks3URI uri, KsyunProperties ksyunProperties) {
    super(client, uri, ksyunProperties);
  }

  /**
   * Note: this may be stale if file was deleted since metadata is cached for size/existence checks.
   *
   * @return content length
   */
  @Override
  public long getLength() {
    return getObjectMetadata().getContentLength();
  }

  @Override
  public SeekableInputStream newStream() {
    return new Ks3SeekableInputStream(client(), uri());
  }
}