org.apache.hadoop.fs.impl.PathCapabilitiesSupport Maven / Gradle / Ivy
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* distributed with this work for additional information
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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.fs.impl;
import java.util.Locale;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathCapabilities;
import static org.apache.hadoop.thirdparty.com.google.common.base.Preconditions.checkArgument;
@InterfaceAudience.Private
@InterfaceStability.Evolving
public class PathCapabilitiesSupport {
/**
* Validate the arguments to
* {@link PathCapabilities#hasPathCapability(Path, String)}.
* @param path path to query the capability of.
* @param capability non-null, non-empty string to query the path for support.
* @return the string to use in a switch statement.
* @throws IllegalArgumentException if a an argument is invalid.
*/
public static String validatePathCapabilityArgs(
final Path path, final String capability) {
checkArgument(path != null, "null path");
checkArgument(capability != null, "capability parameter is null");
checkArgument(!capability.isEmpty(),
"capability parameter is empty string");
return capability.toLowerCase(Locale.ENGLISH);
}
}