com.hivemq.client.internal.mqtt.message.unsubscribe.mqtt3.Mqtt3UnsubscribeViewBuilder Maven / Gradle / Ivy
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/*
* Copyright 2018-present HiveMQ and the HiveMQ Community
*
* 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.hivemq.client.internal.mqtt.message.unsubscribe.mqtt3;
import com.hivemq.client.internal.mqtt.datatypes.MqttTopicFilterImpl;
import com.hivemq.client.internal.mqtt.datatypes.MqttTopicFilterImplBuilder;
import com.hivemq.client.internal.mqtt.message.subscribe.MqttSubscription;
import com.hivemq.client.internal.mqtt.util.MqttChecks;
import com.hivemq.client.internal.util.Checks;
import com.hivemq.client.internal.util.collections.ImmutableList;
import com.hivemq.client.mqtt.datatypes.MqttTopicFilter;
import com.hivemq.client.mqtt.mqtt3.message.subscribe.Mqtt3Subscribe;
import com.hivemq.client.mqtt.mqtt3.message.unsubscribe.Mqtt3UnsubscribeBuilder;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.Collection;
import java.util.function.Consumer;
import java.util.function.Function;
import java.util.stream.Stream;
/**
* @author Silvio Giebl
*/
public abstract class Mqtt3UnsubscribeViewBuilder> {
private final ImmutableList.@NotNull Builder topicFiltersBuilder;
Mqtt3UnsubscribeViewBuilder() {
topicFiltersBuilder = ImmutableList.builder();
}
Mqtt3UnsubscribeViewBuilder(final @NotNull Mqtt3UnsubscribeView unsubscribe) {
final ImmutableList topicFilters = unsubscribe.getDelegate().getTopicFilters();
topicFiltersBuilder = ImmutableList.builder(topicFilters.size() + 1);
topicFiltersBuilder.addAll(topicFilters);
}
abstract @NotNull B self();
public @NotNull B addTopicFilter(final @Nullable String topicFilter) {
topicFiltersBuilder.add(MqttTopicFilterImpl.of(topicFilter));
return self();
}
public @NotNull B addTopicFilter(final @Nullable MqttTopicFilter topicFilter) {
topicFiltersBuilder.add(MqttChecks.topicFilter(topicFilter));
return self();
}
public MqttTopicFilterImplBuilder.@NotNull Nested addTopicFilter() {
return new MqttTopicFilterImplBuilder.Nested<>(this::addTopicFilter);
}
public @NotNull B addTopicFilters(final @Nullable MqttTopicFilter @Nullable ... topicFilters) {
Checks.notNull(topicFilters, "Topic Filters");
topicFiltersBuilder.ensureFree(topicFilters.length);
for (final MqttTopicFilter topicFilter : topicFilters) {
addTopicFilter(topicFilter);
}
ensureAtLeastOneSubscription();
return self();
}
public @NotNull B addTopicFilters(final @Nullable Collection<@Nullable ? extends MqttTopicFilter> topicFilters) {
Checks.notNull(topicFilters, "Topic Filters");
topicFiltersBuilder.ensureFree(topicFilters.size());
topicFilters.forEach(this::addTopicFilter);
ensureAtLeastOneSubscription();
return self();
}
public @NotNull B addTopicFilters(final @Nullable Stream<@Nullable ? extends MqttTopicFilter> topicFilters) {
Checks.notNull(topicFilters, "Topic Filters");
topicFilters.forEach(this::addTopicFilter);
ensureAtLeastOneSubscription();
return self();
}
public @NotNull B reverse(final @Nullable Mqtt3Subscribe subscribe) {
final ImmutableList subscriptions = MqttChecks.subscribe(subscribe).getSubscriptions();
for (final MqttSubscription subscription : subscriptions) {
topicFiltersBuilder.add(subscription.getTopicFilter());
}
return self();
}
public @NotNull B topicFilter(final @Nullable String topicFilter) {
return addTopicFilter(topicFilter);
}
public @NotNull B topicFilter(final @Nullable MqttTopicFilter topicFilter) {
return addTopicFilter(topicFilter);
}
public MqttTopicFilterImplBuilder.@NotNull Nested topicFilter() {
return new MqttTopicFilterImplBuilder.Nested<>(this::topicFilter);
}
private void ensureAtLeastOneSubscription() {
Checks.state(topicFiltersBuilder.getSize() > 0, "At least one topic filter must be added.");
}
public @NotNull Mqtt3UnsubscribeView build() {
ensureAtLeastOneSubscription();
return Mqtt3UnsubscribeView.of(topicFiltersBuilder.build());
}
public static class Default extends Mqtt3UnsubscribeViewBuilder
implements Mqtt3UnsubscribeBuilder.Complete, Mqtt3UnsubscribeBuilder.Start {
public Default() {}
Default(final @NotNull Mqtt3UnsubscribeView unsubscribe) {
super(unsubscribe);
}
@Override
@NotNull Default self() {
return this;
}
}
public static class Nested extends Mqtt3UnsubscribeViewBuilder>
implements Mqtt3UnsubscribeBuilder.Nested.Complete, Mqtt3UnsubscribeBuilder.Nested.Start
{
private final @NotNull Function parentConsumer;
public Nested(final @NotNull Function parentConsumer) {
this.parentConsumer = parentConsumer;
}
@Override
@NotNull Nested
self() {
return this;
}
@Override
public @NotNull P applyUnsubscribe() {
return parentConsumer.apply(build());
}
}
public static class Send
extends Mqtt3UnsubscribeViewBuilder>
implements Mqtt3UnsubscribeBuilder.Send.Complete, Mqtt3UnsubscribeBuilder.Send.Start
{
private final @NotNull Function parentConsumer;
public Send(final @NotNull Function parentConsumer) {
this.parentConsumer = parentConsumer;
}
@Override
@NotNull Send
self() {
return this;
}
@Override
public @NotNull P send() {
return parentConsumer.apply(build());
}
}
public static class SendVoid extends Mqtt3UnsubscribeViewBuilder
implements Mqtt3UnsubscribeBuilder.SendVoid.Complete, Mqtt3UnsubscribeBuilder.SendVoid.Start {
private final @NotNull Consumer parentConsumer;
public SendVoid(final @NotNull Consumer parentConsumer) {
this.parentConsumer = parentConsumer;
}
@Override
@NotNull SendVoid self() {
return this;
}
@Override
public void send() {
parentConsumer.accept(build());
}
}
}