content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.underfs.ozone;
  
  import alluxio.AlluxioURI;
  import alluxio.OzoneUfsConstants;
  import alluxio.conf.Configuration;
  import alluxio.conf.PropertyKey;
  import alluxio.underfs.UnderFileSystem;
  import alluxio.underfs.UnderFileSystemConfiguration;
  import alluxio.underfs.hdfs.HdfsUnderFileSystemFactory;
  
  import com.google.common.base.Preconditions;
  
  import java.util.List;
  import javax.annotation.concurrent.ThreadSafe;
  
  /**
   * Factory for creating {@link OzoneUnderFileSystem}.
   */
  @ThreadSafe
  public class OzoneUnderFileSystemFactory extends HdfsUnderFileSystemFactory {
  
    @Override
    public UnderFileSystem create(String path, UnderFileSystemConfiguration conf) {
      Preconditions.checkNotNull(path, "path");
      return OzoneUnderFileSystem.createInstance(new AlluxioURI(path), conf);
    }
  
    @Override
    public boolean supportsPath(String path) {
      List<String> prefixes = Configuration.global().getList(PropertyKey.UNDERFS_OZONE_PREFIXES);
      if (path != null) {
        for (final String prefix : prefixes) {
          if (path.startsWith(prefix)) {
            return true;
          }
        }
      }
      return false;
    }
  
    @Override
    public boolean supportsPath(String path, UnderFileSystemConfiguration conf) {
      if (supportsPath(path)) {
        if (!conf.isSetByUser(PropertyKey.UNDERFS_VERSION)
            || conf.get(PropertyKey.UNDERFS_VERSION).equals(getVersion())) {
          return true;
        }
      }
      return false;
    }
  
    @Override
    public String getVersion() {
      return OzoneUfsConstants.UFS_OZONE_VERSION;
    }
  }
  