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/*
* Copyright 2013 Google Inc.
*
* Licensed 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 com.google.common.jimfs;
import com.google.common.collect.ImmutableMap;
import org.checkerframework.checker.nullness.compatqual.NullableDecl;
/**
* Static registry of {@link AttributeProvider} implementations for the standard set of file
* attribute views Jimfs supports.
*
* @author Colin Decker
*/
final class StandardAttributeProviders {
private StandardAttributeProviders() {}
private static final ImmutableMap<String, AttributeProvider> PROVIDERS =
new ImmutableMap.Builder<String, AttributeProvider>()
.put("basic", new BasicAttributeProvider())
.put("owner", new OwnerAttributeProvider())
.put("posix", new PosixAttributeProvider())
.put("dos", new DosAttributeProvider())
.put("acl", new AclAttributeProvider())
.put("user", new UserDefinedAttributeProvider())
.build();
/**
* Returns the attribute provider for the given view, or {@code null} if the given view is not one
* of the attribute views this supports.
*/
@NullableDecl
public static AttributeProvider get(String view) {
AttributeProvider provider = PROVIDERS.get(view);
if (provider == null && view.equals("unix")) {
// create a new UnixAttributeProvider per file system, as it does some caching that should be
// cleaned up when the file system is garbage collected
return new UnixAttributeProvider();
}
return provider;
}
}
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