1/*
2 * Copyright (C) 2013 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
5 * in compliance with the License. You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software distributed under the License
10 * is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
11 * or implied. See the License for the specific language governing permissions and limitations under
12 * the License.
13 */
14
15package com.google.caliper.util;
16
17import static com.google.common.base.Preconditions.checkNotNull;
18
19import dagger.Module;
20import dagger.Provides;
21
22import java.io.PrintWriter;
23
24/**
25 * A module that binds {@link PrintWriter} instances for {@link Stdout} and {@link Stderr}.
26 */
27@Module
28public final class OutputModule {
29  public static OutputModule system() {
30    return new OutputModule(new PrintWriter(System.out, true), new PrintWriter(System.err, true));
31  }
32
33  private final PrintWriter stdout;
34  private final PrintWriter stderr;
35
36  public OutputModule(PrintWriter stdout, PrintWriter stderr) {
37    this.stdout = checkNotNull(stdout);
38    this.stderr = checkNotNull(stderr);
39  }
40
41  @Provides @Stdout PrintWriter provideStdoutWriter() {
42    return stdout;
43  }
44
45  @Provides @Stderr PrintWriter provideStderr() {
46    return stderr;
47  }
48}
49