org.apache.hadoop.hdfs.client.DfsPathCapabilities Maven / Gradle / Ivy
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* 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
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*/
package org.apache.hadoop.hdfs.client;
import java.util.Optional;
import org.apache.hadoop.fs.CommonPathCapabilities;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import static org.apache.hadoop.fs.impl.PathCapabilitiesSupport.validatePathCapabilityArgs;
public final class DfsPathCapabilities {
private DfsPathCapabilities() {
}
/**
* Common implementation of {@code hasPathCapability} for DFS and webhdfs.
* @param path path to check
* @param capability capability
* @return either a value to return or, if empty, a cue for the FS to
* pass up to its superclass.
*/
public static Optional hasPathCapability(final Path path,
final String capability) {
switch (validatePathCapabilityArgs(path, capability)) {
case CommonPathCapabilities.FS_ACLS:
case CommonPathCapabilities.FS_APPEND:
case CommonPathCapabilities.FS_CHECKSUMS:
case CommonPathCapabilities.FS_CONCAT:
case CommonPathCapabilities.FS_LIST_CORRUPT_FILE_BLOCKS:
case CommonPathCapabilities.FS_MULTIPART_UPLOADER:
case CommonPathCapabilities.FS_PATHHANDLES:
case CommonPathCapabilities.FS_PERMISSIONS:
case CommonPathCapabilities.FS_SNAPSHOTS:
case CommonPathCapabilities.FS_STORAGEPOLICY:
case CommonPathCapabilities.FS_XATTRS:
case CommonPathCapabilities.FS_TRUNCATE:
return Optional.of(true);
case CommonPathCapabilities.FS_SYMLINKS:
return Optional.of(FileSystem.areSymlinksEnabled());
default:
return Optional.empty();
}
}
}