| /* |
| * Copyright 2016-present Open Networking Laboratory |
| * |
| * 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 org.onosproject.store.primitives.impl; |
| |
| |
| import org.onosproject.store.service.Serializer; |
| import org.onosproject.store.service.TransactionContext; |
| import org.onosproject.store.service.TransactionalMap; |
| import org.onosproject.store.service.TransactionalSet; |
| |
| /** |
| * Default TransactionalSet implementation that provides a repeatable reads |
| * transaction isolation level. |
| * |
| * @param <E> element type. |
| */ |
| public class DefaultTransactionalSet<E> implements TransactionalSet<E> { |
| |
| private TransactionalMap<E, Boolean> map; |
| |
| // dummy value to associate with an Object in the backing map |
| private static final Boolean PRESENT = Boolean.TRUE; |
| |
| public DefaultTransactionalSet( |
| String name, |
| TransactionContext txContext, |
| Serializer serializer) { |
| map = txContext.getTransactionalMap(name, serializer); |
| } |
| |
| @Override |
| public boolean add(E e) { |
| return map.put(e, PRESENT) == null; |
| } |
| |
| @Override |
| public boolean remove(E e) { |
| return map.remove(e) != null; |
| } |
| |
| @Override |
| public boolean contains(E e) { |
| return map.get(e) != null; |
| } |
| } |