1 /*
2 * Copyright 2017 The Netty Project
3 *
4 * The Netty Project licenses this file to you under the Apache License,
5 * version 2.0 (the "License"); you may not use this file except in compliance
6 * with the License. You may obtain a copy of the License at:
7 *
8 * https://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
12 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13 * License for the specific language governing permissions and limitations
14 * under the License.
15 */
16 package io.netty.resolver.dns;
17
18 import io.netty.util.internal.ObjectUtil;
19
20 /**
21 * A {@link DnsServerAddressStreamProvider} which is backed by a single {@link DnsServerAddresses}.
22 */
23 abstract class UniSequentialDnsServerAddressStreamProvider implements DnsServerAddressStreamProvider {
24 private final DnsServerAddresses addresses;
25
26 UniSequentialDnsServerAddressStreamProvider(DnsServerAddresses addresses) {
27 this.addresses = ObjectUtil.checkNotNull(addresses, "addresses");
28 }
29
30 @Override
31 public final DnsServerAddressStream nameServerAddressStream(String hostname) {
32 return addresses.stream();
33 }
34 }