org.apache.jackrabbit.oak.spi.security.principal.EmptyPrincipalProvider Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file 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
* 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 org.apache.jackrabbit.oak.spi.security.principal;
import java.security.Principal;
import java.security.acl.Group;
import java.util.Iterator;
import java.util.Set;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterators;
/**
* Implementation of the {@code PrincipalProvider} interface that never
* returns any principals.
*/
public final class EmptyPrincipalProvider implements PrincipalProvider {
public static final PrincipalProvider INSTANCE = new EmptyPrincipalProvider();
private EmptyPrincipalProvider() {}
@Override
public Principal getPrincipal(@Nonnull String principalName) {
return null;
}
@Nonnull
@Override
public Set getGroupMembership(@Nonnull Principal principal) {
return ImmutableSet.of();
}
@Nonnull
@Override
public Set getPrincipals(@Nonnull String userID) {
return ImmutableSet.of();
}
@Nonnull
@Override
public Iterator findPrincipals(@Nullable String nameHint, int searchType) {
return Iterators.emptyIterator();
}
@Nonnull
@Override
public Iterator findPrincipals(int searchType) {
return Iterators.emptyIterator();
}
}