kalix.scalasdk.replicatedentity.ReplicatedMultiMap.scala Maven / Gradle / Ivy
/*
* Copyright 2021 Lightbend Inc.
*
* 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 kalix.scalasdk.replicatedentity
import scala.collection.immutable.Set
import kalix.javasdk.impl.replicatedentity.ReplicatedMultiMapImpl
import kalix.protocol.replicated_entity.ReplicatedEntityDelta
/**
* A replicated map that maps keys to values, where each key may be associated with multiple values. Effectively a
* ReplicatedMap with [[ReplicatedSet]] s as values.
*
* @tparam K
* The type for keys.
* @tparam V
* The type for values.
*/
class ReplicatedMultiMap[K, V] private[scalasdk] (override val delegate: ReplicatedMultiMapImpl[K, V])
extends InternalReplicatedData {
/**
* Get the values for the given key.
*
* @param key
* the key of the mapping
* @return
* the current values at the given key, or an empty Set
*/
def get(key: K): Set[V] =
delegate.getValuesSet(key)
/**
* Store a key-value pair, if not already present.
*
* @param key
* the key of the mapping to add to
* @param value
* the value to add to the mapping
* @return
* a new multi-map with the additional value, or this unchanged multi-map
*/
def put(key: K, value: V): ReplicatedMultiMap[K, V] =
new ReplicatedMultiMap(delegate.put(key, value))
/**
* Store multiple values for a key.
*
* @param key
* the key of the mapping to add to
* @param values
* the values to add to the mapping
* @return
* a new multi-map with the additional values, or this unchanged multi-map
*/
def putAll(key: K, values: Iterable[V]): ReplicatedMultiMap[K, V] =
new ReplicatedMultiMap(delegate.putAll(key, values))
/**
* Remove a single key-value pair for the given key and value, if present.
*
* @param key
* the key of the mapping to remove from
* @param value
* the value to remove from the mapping
* @return
* a new multi-map with the removed value, or this unchanged multi-map
*/
def remove(key: K, value: V): ReplicatedMultiMap[K, V] =
new ReplicatedMultiMap(delegate.remove(key, value))
/**
* Remove all values associated with the given key.
*
* @param key
* the key of the mapping to remove
* @return
* a new multi-map with the removed mapping
*/
def removeAll(key: K): ReplicatedMultiMap[K, V] =
new ReplicatedMultiMap(delegate.removeAll(key))
/**
* Remove all key-value pairs from the multi-map, leaving it empty.
*
* @return
* a new empty multi-map
*/
def clear(): ReplicatedMultiMap[K, V] =
new ReplicatedMultiMap(delegate.clear())
/**
* Return the number of key-value pairs in this multi-map.
*
* Note that this does not return the number of distinct keys, which is given by `keySet().size()`, but the total
* number of values stored in the multi-map.
*
* @return
* the number of key-value pairs stored in this multi-map
*/
def size: Int = delegate.size
/**
* Check whether this multi-map is empty.
*
* @return
* `true` if this multi-map contains no key-value pairs
*/
def isEmpty: Boolean = delegate.isEmpty
/**
* Check whether this multi-map contains at least one value for the given key.
*
* @param key
* the key of the mapping to check
* @return
* `true` if there is at least one key-value pair for the key
*/
def contains(key: K): Boolean = delegate.containsKey(key)
/**
* Check whether this multi-map contains the given value associated with the given key.
*
* @param key
* the key of the mapping to check
* @param value
* the value of the mapping to check
* @return
* `true` if the key-value pair is in this multi-map
*/
def containsValue(key: K, value: V): Boolean =
delegate.containsValue(key, value)
/**
* Return the keys contained in this multi-map.
*
*
Note that the key set contains a key if and only if this multi-map maps that key to at least one value.
*
* @return
* the set of keys in this multi-map
*/
def keySet: Set[K] = delegate.keys
final override type Self = ReplicatedMultiMap[K, V]
final override def resetDelta(): ReplicatedMultiMap[K, V] =
new ReplicatedMultiMap(delegate.resetDelta())
final override def applyDelta: PartialFunction[ReplicatedEntityDelta.Delta, ReplicatedMultiMap[K, V]] =
delegate.applyDelta.andThen(new ReplicatedMultiMap(_))
}