com.hivemq.client.internal.mqtt.message.unsubscribe.MqttUnsubscribeBuilder Maven / Gradle / Ivy
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/*
* Copyright 2018 dc-square and the HiveMQ MQTT Client Project
*
* 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;
import com.hivemq.client.internal.mqtt.datatypes.MqttTopicFilterImpl;
import com.hivemq.client.internal.mqtt.datatypes.MqttTopicFilterImplBuilder;
import com.hivemq.client.internal.mqtt.datatypes.MqttUserPropertiesImpl;
import com.hivemq.client.internal.mqtt.datatypes.MqttUserPropertiesImplBuilder;
import com.hivemq.client.internal.mqtt.message.subscribe.MqttSubscription;
import com.hivemq.client.internal.mqtt.util.MqttChecks;
import com.hivemq.client.internal.util.collections.ImmutableList;
import com.hivemq.client.mqtt.datatypes.MqttTopicFilter;
import com.hivemq.client.mqtt.mqtt5.datatypes.Mqtt5UserProperties;
import com.hivemq.client.mqtt.mqtt5.message.subscribe.Mqtt5Subscribe;
import com.hivemq.client.mqtt.mqtt5.message.unsubscribe.Mqtt5UnsubscribeBuilder;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.function.Function;
/**
* @author Silvio Giebl
*/
public abstract class MqttUnsubscribeBuilder> {
private final @NotNull ImmutableList.Builder topicFiltersBuilder;
private @NotNull MqttUserPropertiesImpl userProperties = MqttUserPropertiesImpl.NO_USER_PROPERTIES;
MqttUnsubscribeBuilder() {
topicFiltersBuilder = ImmutableList.builder();
}
MqttUnsubscribeBuilder(final @NotNull MqttUnsubscribe unsubscribe) {
final ImmutableList topicFilters = unsubscribe.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 @NotNull MqttTopicFilterImplBuilder.Nested addTopicFilter() {
return new MqttTopicFilterImplBuilder.Nested<>(this::addTopicFilter);
}
public @NotNull B reverse(final @Nullable Mqtt5Subscribe subscribe) {
final ImmutableList subscriptions = MqttChecks.subscribe(subscribe).getSubscriptions();
for (final MqttSubscription subscription : subscriptions) {
topicFiltersBuilder.add(subscription.getTopicFilter());
}
return self();
}
public @NotNull B userProperties(final @Nullable Mqtt5UserProperties userProperties) {
this.userProperties = MqttChecks.userProperties(userProperties);
return self();
}
public @NotNull MqttUserPropertiesImplBuilder.Nested userProperties() {
return new MqttUserPropertiesImplBuilder.Nested<>(userProperties, this::userProperties);
}
public @NotNull B topicFilter(final @Nullable String topicFilter) {
return addTopicFilter(topicFilter);
}
public @NotNull B topicFilter(final @Nullable MqttTopicFilter topicFilter) {
return addTopicFilter(topicFilter);
}
public @NotNull MqttTopicFilterImplBuilder.Nested topicFilter() {
return new MqttTopicFilterImplBuilder.Nested<>(this::topicFilter);
}
public @NotNull MqttUnsubscribe build() {
final ImmutableList topicFilters = topicFiltersBuilder.build();
if (topicFilters.isEmpty()) {
throw new IllegalStateException("At least one topic filter must be added.");
}
return new MqttUnsubscribe(topicFilters, userProperties);
}
public static class Default extends MqttUnsubscribeBuilder
implements Mqtt5UnsubscribeBuilder.Complete, Mqtt5UnsubscribeBuilder.Start {
public Default() {}
Default(final @NotNull MqttUnsubscribe unsubscribe) {
super(unsubscribe);
}
@Override
@NotNull Default self() {
return this;
}
}
public static class Nested extends MqttUnsubscribeBuilder>
implements Mqtt5UnsubscribeBuilder.Nested.Complete, Mqtt5UnsubscribeBuilder.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 MqttUnsubscribeBuilder>
implements Mqtt5UnsubscribeBuilder.Send.Complete, Mqtt5UnsubscribeBuilder.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());
}
}
}