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UserProperty.java
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UserProperty.java
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/*
* Copyright (c) 2022 Contributors to the Eclipse Foundation
*
* See the NOTICE file(s) distributed with this work for additional
* information regarding copyright ownership.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.eclipse.ditto.connectivity.service.messaging.mqtt.hivemq.message.publish;
import java.text.MessageFormat;
import javax.annotation.concurrent.Immutable;
import org.eclipse.ditto.base.model.common.ConditionChecker;
/**
* A name and value UTF-8 encoded String pair.
* This resembles a MQTT User Property according to the MQTT 5 specification.
*/
@Immutable
public record UserProperty(String name, String value) {
/**
* Constructs a {@code UserProperty} for the specified name and value arguments.
*
* @param name the name of the User Property.
* @param value the value of the User Property.
* @throws NullPointerException if any argument is {@code null}.
* @throws IllegalArgumentException if any argument is empty or blank.
*/
public UserProperty(final String name, final String value) {
this.name = assertNeitherNullNorBlank(name, "name");
this.value = assertNeitherNullNorBlank(value, "value");
}
private static String assertNeitherNullNorBlank(final String s, final String argumentName) {
return ConditionChecker.checkArgument(ConditionChecker.checkNotNull(s, argumentName),
a -> !a.isBlank(),
() -> MessageFormat.format("The {0} must not be blank.", argumentName));
}
}