content: /*
   * 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
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * 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.
   */
  package org.apache.beam.sdk.metrics;
  
  import static org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkNotNull;
  
  import com.google.auto.value.AutoValue;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /** The name of a metric. */
  @AutoValue
  public abstract class MetricNameFilter {
  
    /** The inNamespace that a metric must be in to match this {@link MetricNameFilter}. */
    public abstract String getNamespace();
  
    /** If set, the metric must have this name to match this {@link MetricNameFilter}. */
    public abstract @Nullable String getName();
  
    public static MetricNameFilter inNamespace(String namespace) {
      return new AutoValue_MetricNameFilter(namespace, null);
    }
  
    public static MetricNameFilter inNamespace(Class<?> namespace) {
      return new AutoValue_MetricNameFilter(namespace.getName(), null);
    }
  
    public static MetricNameFilter named(String namespace, String name) {
      checkNotNull(name, "Must specify a name");
      return new AutoValue_MetricNameFilter(namespace, name);
    }
  
    public static MetricNameFilter named(Class<?> namespace, String name) {
      checkNotNull(namespace, "Must specify a inNamespace");
      checkNotNull(name, "Must specify a name");
      return new AutoValue_MetricNameFilter(namespace.getName(), name);
    }
  }
  