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Diffstat (limited to 'jimfs/src/main/java/com/google/common/jimfs/StandardAttributeProviders.java')
-rw-r--r-- | jimfs/src/main/java/com/google/common/jimfs/StandardAttributeProviders.java | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/jimfs/src/main/java/com/google/common/jimfs/StandardAttributeProviders.java b/jimfs/src/main/java/com/google/common/jimfs/StandardAttributeProviders.java new file mode 100644 index 0000000..973c6bb --- /dev/null +++ b/jimfs/src/main/java/com/google/common/jimfs/StandardAttributeProviders.java @@ -0,0 +1,58 @@ +/* + * 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; + } +} |