diff options
Diffstat (limited to 'jimfs/src/main/java/com/google/common/jimfs/UserLookupService.java')
-rw-r--r-- | jimfs/src/main/java/com/google/common/jimfs/UserLookupService.java | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/jimfs/src/main/java/com/google/common/jimfs/UserLookupService.java b/jimfs/src/main/java/com/google/common/jimfs/UserLookupService.java new file mode 100644 index 0000000..419d71f --- /dev/null +++ b/jimfs/src/main/java/com/google/common/jimfs/UserLookupService.java @@ -0,0 +1,114 @@ +/* + * 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 static com.google.common.base.Preconditions.checkNotNull; + +import java.io.IOException; +import java.nio.file.attribute.GroupPrincipal; +import java.nio.file.attribute.UserPrincipal; +import java.nio.file.attribute.UserPrincipalLookupService; +import java.nio.file.attribute.UserPrincipalNotFoundException; + +/** + * {@link UserPrincipalLookupService} implementation. + * + * @author Colin Decker + */ +final class UserLookupService extends UserPrincipalLookupService { + + private final boolean supportsGroups; + + public UserLookupService(boolean supportsGroups) { + this.supportsGroups = supportsGroups; + } + + @Override + public UserPrincipal lookupPrincipalByName(String name) { + return createUserPrincipal(name); + } + + @Override + public GroupPrincipal lookupPrincipalByGroupName(String group) throws IOException { + if (!supportsGroups) { + throw new UserPrincipalNotFoundException(group); // required by spec + } + return createGroupPrincipal(group); + } + + /** Creates a {@link UserPrincipal} for the given user name. */ + static UserPrincipal createUserPrincipal(String name) { + return new JimfsUserPrincipal(name); + } + + /** Creates a {@link GroupPrincipal} for the given group name. */ + static GroupPrincipal createGroupPrincipal(String name) { + return new JimfsGroupPrincipal(name); + } + + /** Base class for {@link UserPrincipal} and {@link GroupPrincipal} implementations. */ + private abstract static class NamedPrincipal implements UserPrincipal { + + protected final String name; + + private NamedPrincipal(String name) { + this.name = checkNotNull(name); + } + + @Override + public final String getName() { + return name; + } + + @Override + public final int hashCode() { + return name.hashCode(); + } + + @Override + public final String toString() { + return name; + } + } + + /** {@link UserPrincipal} implementation. */ + static final class JimfsUserPrincipal extends NamedPrincipal { + + private JimfsUserPrincipal(String name) { + super(name); + } + + @Override + public boolean equals(Object obj) { + return obj instanceof JimfsUserPrincipal + && getName().equals(((JimfsUserPrincipal) obj).getName()); + } + } + + /** {@link GroupPrincipal} implementation. */ + static final class JimfsGroupPrincipal extends NamedPrincipal implements GroupPrincipal { + + private JimfsGroupPrincipal(String name) { + super(name); + } + + @Override + public boolean equals(Object obj) { + return obj instanceof JimfsGroupPrincipal && ((JimfsGroupPrincipal) obj).name.equals(name); + } + } +} |