server/queue/queue-api/src/main/java/org/apache/james/queue/api/MailQueueName.java

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 * Licensed to the Apache Software Foundation (ASF) under one   *
 * or more contributor license agreements.  See the NOTICE file *
 * distributed with this work for additional information        *
 * regarding copyright ownership.  The ASF licenses this file   *
 * to you 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   *
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 *   http://www.apache.org/licenses/LICENSE-2.0                 *
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 * 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.                                           *
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package org.apache.james.queue.api;

import java.util.Objects;

import com.google.common.base.MoreObjects;
import com.google.common.base.Preconditions;

public final class MailQueueName {

    public static MailQueueName of(String value) {
        Preconditions.checkNotNull(value);
        Preconditions.checkArgument(!value.isEmpty());
        return new MailQueueName(value);
    }

    private final String value;

    private MailQueueName(String value) {
        this.value = value;
    }

    public String asString() {
        return value;
    }

    @Override
    public boolean equals(Object o) {
        if (o instanceof MailQueueName) {
            MailQueueName that = (MailQueueName) o;
            return Objects.equals(value, that.value);
        }
        return false;
    }

    @Override
    public int hashCode() {
        return Objects.hash(value);
    }

    @Override
    public String toString() {
        return MoreObjects.toStringHelper(this)
            .add("value", value)
            .toString();
    }
}