hadoop OSSListResult 源码

haddop OSSListResult 代码

文件路径：/hadoop-tools/hadoop-aliyun/src/main/java/org/apache/hadoop/fs/aliyun/oss/OSSListResult.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
 * <p/>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p/>
 * 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.hadoop.fs.aliyun.oss;

import com.aliyun.oss.model.ListObjectsV2Result;
import com.aliyun.oss.model.OSSObjectSummary;
import com.aliyun.oss.model.ObjectListing;
import org.slf4j.Logger;

import java.util.Collection;
import java.util.List;

/**
 * API version-independent container for OSS List responses.
 */
public final class OSSListResult {
  private ObjectListing v1Result;
  private ListObjectsV2Result v2Result;

  protected OSSListResult(ObjectListing v1, ListObjectsV2Result v2) {
    v1Result = v1;
    v2Result = v2;
  }

  /**
   * Restricted constructors to ensure v1 or v2, not both.
   * @param result v1 result
   * @return new list result container
   */
  public static OSSListResult v1(ObjectListing result) {
    return new OSSListResult(result, null);
  }

  /**
   * Restricted constructors to ensure v1 or v2, not both.
   * @param result v2 result
   * @return new list result container
   */
  public static OSSListResult v2(ListObjectsV2Result result) {
    return new OSSListResult(null, result);
  }

  /**
   * Is this a v1 API result or v2?
   * @return true if v1, false if v2
   */
  public boolean isV1() {
    return v1Result != null;
  }

  public ObjectListing getV1() {
    return v1Result;
  }

  public ListObjectsV2Result getV2() {
    return v2Result;
  }

  public List<OSSObjectSummary> getObjectSummaries() {
    if (isV1()) {
      return v1Result.getObjectSummaries();
    } else {
      return v2Result.getObjectSummaries();
    }
  }

  public boolean isTruncated() {
    if (isV1()) {
      return v1Result.isTruncated();
    } else {
      return v2Result.isTruncated();
    }
  }

  public List<String> getCommonPrefixes() {
    if (isV1()) {
      return v1Result.getCommonPrefixes();
    } else {
      return v2Result.getCommonPrefixes();
    }
  }

  /**
   * Dump the result at debug level.
   * @param log log to use
   */
  public void logAtDebug(Logger log) {
    Collection<String> prefixes = getCommonPrefixes();
    Collection<OSSObjectSummary> summaries = getObjectSummaries();
    log.debug("Prefix count = {}; object count={}",
        prefixes.size(), summaries.size());
    for (OSSObjectSummary summary : summaries) {
      log.debug("Summary: {} {}", summary.getKey(), summary.getSize());
    }
    for (String prefix : prefixes) {
      log.debug("Prefix: {}", prefix);
    }
  }
}

相关信息

hadoop 源码目录

相关文章

hadoop AliyunCredentialsProvider 源码

hadoop AliyunOSSBlockOutputStream 源码

hadoop AliyunOSSCopyFileContext 源码

hadoop AliyunOSSCopyFileTask 源码

hadoop AliyunOSSFileReaderTask 源码

hadoop AliyunOSSFileSystem 源码

hadoop AliyunOSSFileSystemStore 源码

hadoop AliyunOSSInputStream 源码

hadoop AliyunOSSUtils 源码

hadoop Constants 源码