| /* |
| * Copyright 2016 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 com.google.common.collect.ImmutableMultiset; |
| import com.google.common.collect.Maps; |
| import com.google.common.collect.Multiset; |
| import org.onlab.util.Tools; |
| import org.onosproject.store.service.AsyncConsistentMultimap; |
| import org.onosproject.store.service.Versioned; |
| |
| import java.util.Collection; |
| import java.util.EnumSet; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.function.BiConsumer; |
| import java.util.function.BinaryOperator; |
| import java.util.function.Consumer; |
| import java.util.function.Function; |
| import java.util.function.Supplier; |
| import java.util.stream.Collector; |
| import java.util.stream.Collectors; |
| |
| /** |
| * An {@link AsyncConsistentMultimap} that maps its operation to operations to |
| * a differently typed {@link AsyncConsistentMultimap} by transcoding operation |
| * inputs and outputs while maintaining version numbers. |
| * |
| * @param <K2> key type of other map |
| * @param <V2> value type of other map |
| * @param <K1> key type of this map |
| * @param <V1> value type of this map |
| */ |
| public class TranscodingAsyncConsistentMultimap<K1, V1, K2, V2> |
| implements AsyncConsistentMultimap<K1, V1> { |
| |
| private final AsyncConsistentMultimap<K2, V2> backingMap; |
| private final Function<K1, K2> keyEncoder; |
| private final Function<K2, K1> keyDecoder; |
| private final Function<V2, V1> valueDecoder; |
| private final Function<V1, V2> valueEncoder; |
| private final Function<? extends Versioned<V2>, |
| ? extends Versioned<V1>> versionedValueTransform; |
| private final Function<Versioned<Collection<? extends V2>>, |
| Versioned<Collection<? extends V1>>> versionedValueCollectionDecode; |
| private final Function<Collection<? extends V1>, Collection<V2>> |
| valueCollectionEncode; |
| |
| public TranscodingAsyncConsistentMultimap( |
| AsyncConsistentMultimap<K2, V2> backingMap, |
| Function<K1, K2> keyEncoder, |
| Function<K2, K1> keyDecoder, |
| Function<V2, V1> valueDecoder, |
| Function<V1, V2> valueEncoder) { |
| this.backingMap = backingMap; |
| this.keyEncoder = k -> k == null ? null : keyEncoder.apply(k); |
| this.keyDecoder = k -> k == null ? null : keyDecoder.apply(k); |
| this.valueDecoder = v -> v == null ? null : valueDecoder.apply(v); |
| this.valueEncoder = v -> v == null ? null : valueEncoder.apply(v); |
| this.versionedValueTransform = v -> v == null ? null : |
| v.map(valueDecoder); |
| this.versionedValueCollectionDecode = v -> v == null ? null : |
| new Versioned<>( |
| v.value() |
| .stream() |
| .map(valueDecoder) |
| .collect(Collectors.toSet()), |
| v.version(), |
| v.creationTime()); |
| this.valueCollectionEncode = v -> v == null ? null : |
| v.stream().map(valueEncoder).collect(Collectors.toSet()); |
| } |
| |
| @Override |
| public CompletableFuture<Integer> size() { |
| return backingMap.size(); |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> isEmpty() { |
| return backingMap.isEmpty(); |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> containsKey(K1 key) { |
| try { |
| return backingMap.containsKey(keyEncoder.apply(key)); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> containsValue(V1 value) { |
| try { |
| return backingMap.containsValue(valueEncoder.apply(value)); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> containsEntry(K1 key, V1 value) { |
| try { |
| return backingMap.containsEntry(keyEncoder.apply(key), |
| valueEncoder.apply(value)); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> put(K1 key, V1 value) { |
| try { |
| return backingMap.put(keyEncoder.apply(key), |
| valueEncoder.apply(value)); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> remove(K1 key, V1 value) { |
| try { |
| return backingMap.remove(keyEncoder.apply(key), valueEncoder |
| .apply(value)); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> removeAll( |
| K1 key, Collection<? extends V1> values) { |
| try { |
| return backingMap.removeAll( |
| keyEncoder.apply(key), |
| values.stream().map(valueEncoder).collect( |
| Collectors.toSet())); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Versioned<Collection<? extends V1>>> |
| removeAll(K1 key) { |
| try { |
| return backingMap.removeAll(keyEncoder.apply(key)) |
| .thenApply(versionedValueCollectionDecode); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Boolean> |
| putAll(K1 key, Collection<? extends V1> values) { |
| try { |
| return backingMap.putAll(keyEncoder.apply(key), |
| valueCollectionEncode.apply(values)); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Versioned<Collection<? extends V1>>> |
| replaceValues(K1 key, Collection<V1> values) { |
| try { |
| return backingMap.replaceValues(keyEncoder.apply(key), |
| valueCollectionEncode.apply(values)) |
| .thenApply(versionedValueCollectionDecode); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Void> clear() { |
| return backingMap.clear(); |
| } |
| |
| @Override |
| public CompletableFuture<Versioned<Collection<? extends V1>>> get(K1 key) { |
| try { |
| return backingMap.get(keyEncoder.apply(key)) |
| .thenApply(versionedValueCollectionDecode); |
| } catch (Exception e) { |
| return Tools.exceptionalFuture(e); |
| } |
| } |
| |
| @Override |
| public CompletableFuture<Set<K1>> keySet() { |
| return backingMap.keySet().thenApply(s -> s.stream() |
| .map(keyDecoder) |
| .collect(Collectors.toSet())); |
| } |
| |
| @Override |
| public CompletableFuture<Multiset<K1>> keys() { |
| return backingMap.keys().thenApply(s -> s.stream().map(keyDecoder) |
| .collect(new MultisetCollector<>())); |
| } |
| |
| @Override |
| public CompletableFuture<Multiset<V1>> values() { |
| return backingMap.values().thenApply(s -> s.stream().map(valueDecoder) |
| .collect(new MultisetCollector<>())); |
| } |
| |
| @Override |
| public CompletableFuture<Collection<Map.Entry<K1, V1>>> entries() { |
| return backingMap.entries().thenApply(s -> s.stream() |
| .map(e -> Maps.immutableEntry(keyDecoder.apply(e.getKey()), |
| valueDecoder.apply(e.getValue()))) |
| .collect(Collectors.toSet())); |
| } |
| |
| @Override |
| public CompletableFuture<Map<K1, Collection<V1>>> asMap() { |
| throw new UnsupportedOperationException("Unsupported operation."); |
| } |
| |
| @Override |
| public String name() { |
| return backingMap.name(); |
| } |
| |
| @Override |
| public void addStatusChangeListener(Consumer<Status> listener) { |
| backingMap.addStatusChangeListener(listener); |
| } |
| |
| @Override |
| public void removeStatusChangeListener(Consumer<Status> listener) { |
| backingMap.removeStatusChangeListener(listener); |
| } |
| |
| @Override |
| public Collection<Consumer<Status>> statusChangeListeners() { |
| return backingMap.statusChangeListeners(); |
| } |
| |
| private class MultisetCollector<T> implements Collector<T, |
| ImmutableMultiset.Builder<T>, |
| Multiset<T>> { |
| |
| @Override |
| public Supplier<ImmutableMultiset.Builder<T>> supplier() { |
| return ImmutableMultiset::builder; |
| } |
| |
| @Override |
| public BiConsumer<ImmutableMultiset.Builder<T>, T> accumulator() { |
| return ((builder, t) -> builder.add(t)); |
| } |
| |
| @Override |
| public BinaryOperator<ImmutableMultiset.Builder<T>> combiner() { |
| return (a, b) -> { |
| a.addAll(b.build()); |
| return a; |
| }; |
| } |
| |
| @Override |
| public Function<ImmutableMultiset.Builder<T>, Multiset<T>> finisher() { |
| return ImmutableMultiset.Builder::build; |
| } |
| |
| @Override |
| public Set<Characteristics> characteristics() { |
| return EnumSet.of(Characteristics.UNORDERED); |
| } |
| } |
| } |