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1   /*
2    * Copyright 2014 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  
17  package io.netty5.resolver;
18  
19  import io.netty5.util.concurrent.EventExecutor;
20  import io.netty5.util.concurrent.Promise;
21  
22  import java.net.SocketAddress;
23  import java.util.Collections;
24  import java.util.List;
25  
26  /**
27   * A {@link AddressResolver} that does not perform any resolution but always reports successful resolution.
28   * This resolver is useful when name resolution is performed by a handler in a pipeline, such as a proxy handler.
29   */
30  public class NoopAddressResolver extends AbstractAddressResolver<SocketAddress> {
31  
32      public NoopAddressResolver(EventExecutor executor) {
33          super(executor);
34      }
35  
36      @Override
37      protected boolean doIsResolved(SocketAddress address) {
38          return true;
39      }
40  
41      @Override
42      protected void doResolve(SocketAddress unresolvedAddress, Promise<SocketAddress> promise) throws Exception {
43          promise.setSuccess(unresolvedAddress);
44      }
45  
46      @Override
47      protected void doResolveAll(
48              SocketAddress unresolvedAddress, Promise<List<SocketAddress>> promise) throws Exception {
49          promise.setSuccess(Collections.singletonList(unresolvedAddress));
50      }
51  }