| /* |
| * Copyright 2015-present Open Networking Foundation |
| * |
| * 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.onlab.util; |
| |
| import java.util.stream.Collector; |
| import java.util.stream.Collector.Characteristics; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableSet; |
| |
| /** |
| * Implementations of {@link Collector} that implement various useful reduction |
| * operations, such as accumulating elements into Guava collections. |
| */ |
| public final class GuavaCollectors { |
| |
| /** |
| * Returns a {@code Collector} that accumulates the input elements into a |
| * new ImmutableSet. |
| * |
| * @param <T> type |
| * @return a {@code Collector} which collects all the input elements into a |
| * {@code ImmutableSet} |
| * |
| * @deprecated in 1.11.0 consider using {@link ImmutableSet#toImmutableSet()} instead. |
| */ |
| @Deprecated |
| public static <T> Collector<T, ImmutableSet.Builder<T>, ImmutableSet<T>> toImmutableSet() { |
| return Collector.of(ImmutableSet.Builder<T>::new, |
| ImmutableSet.Builder<T>::add, |
| (s, r) -> s.addAll(r.build()), |
| ImmutableSet.Builder<T>::build, |
| Characteristics.UNORDERED); |
| } |
| |
| /** |
| * Returns a {@code Collector} that accumulates the input elements into a |
| * new ImmutableList. |
| * |
| * @param <T> type |
| * @return a {@code Collector} which collects all the input elements into a |
| * {@code ImmutableList}, in encounter order |
| * |
| * @deprecated in 1.11.0 consider using {@link ImmutableList#toImmutableList()} instead. |
| */ |
| @Deprecated |
| public static <T> Collector<T, ImmutableList.Builder<T>, ImmutableList<T>> toImmutableList() { |
| return Collector.of(ImmutableList.Builder<T>::new, |
| ImmutableList.Builder<T>::add, |
| (s, r) -> s.addAll(r.build()), |
| ImmutableList.Builder<T>::build); |
| } |
| |
| private GuavaCollectors() {} |
| } |