| // Copyright 2012 Google Inc. All Rights Reserved. |
| // |
| // 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.enterprise.adaptor.sharepoint; |
| |
| import com.google.common.collect.Interner; |
| import com.google.common.collect.Interners; |
| import com.google.enterprise.adaptor.Principal; |
| |
| import java.util.*; |
| |
| /** |
| * Immutable lookup from identifier to name for users and groups. |
| */ |
| class MemberIdMapping { |
| private static final Interner<Principal> interner |
| = Interners.newWeakInterner(); |
| |
| private final Map<Integer, Principal> principals; |
| |
| public MemberIdMapping(Map<Integer, ? extends Principal> principals) { |
| Map<Integer, Principal> tmp = new HashMap<Integer, Principal>(principals); |
| // Most of the purpose for this class is to allow future memory |
| // optimizations without having to tweak all the calling code. Thus, it |
| // makes sense for this class to do intern()ing. |
| for (Map.Entry<Integer, Principal> me : tmp.entrySet()) { |
| me.setValue(interner.intern(me.getValue())); |
| } |
| this.principals = Collections.unmodifiableMap(principals); |
| } |
| |
| public Principal getPrincipal(Integer id) { |
| return principals.get(id); |
| } |
| |
| @Override |
| public String toString() { |
| return "MemberIdMapping(" + principals + ")"; |
| } |
| } |