react-native/ReactAndroid/src/main/java/com/facebook/systrace/SystraceMessage.java

/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

package com.facebook.systrace;

/** Systrace stub. */
public final class SystraceMessage {

  private static final Builder NOOP_BUILDER = new NoopBuilder();

  public static Builder beginSection(long tag, String sectionName) {
    return NOOP_BUILDER;
  }

  public static Builder endSection(long tag) {
    return NOOP_BUILDER;
  }

  public abstract static class Builder {

    public abstract void flush();

    public abstract Builder arg(String key, Object value);

    public abstract Builder arg(String key, int value);

    public abstract Builder arg(String key, long value);

    public abstract Builder arg(String key, double value);
  }

  private interface Flusher {
    void flush(StringBuilder builder);
  }

  private static class NoopBuilder extends Builder {
    @Override
    public void flush() {}

    @Override
    public Builder arg(String key, Object value) {
      return this;
    }

    @Override
    public Builder arg(String key, int value) {
      return this;
    }

    @Override
    public Builder arg(String key, long value) {
      return this;
    }

    @Override
    public Builder arg(String key, double value) {
      return this;
    }
  }
}