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/*
 * Copyright The OpenTelemetry Authors
 * SPDX-License-Identifier: Apache-2.0
 */

package io.opentelemetry.sdk.metrics.internal.view;

import io.opentelemetry.sdk.metrics.Aggregation;
import io.opentelemetry.sdk.metrics.data.ExemplarData;
import io.opentelemetry.sdk.metrics.data.PointData;
import io.opentelemetry.sdk.metrics.internal.aggregator.Aggregator;
import io.opentelemetry.sdk.metrics.internal.aggregator.AggregatorFactory;
import io.opentelemetry.sdk.metrics.internal.descriptor.InstrumentDescriptor;
import io.opentelemetry.sdk.metrics.internal.exemplar.ExemplarFilter;

/**
 * Configuration representing no aggregation.
 *
 * This class is internal and is hence not for public use. Its APIs are unstable and can change
 * at any time.
 */
public final class DropAggregation implements Aggregation, AggregatorFactory {

  private static final Aggregation INSTANCE = new DropAggregation();

  public static Aggregation getInstance() {
    return INSTANCE;
  }

  private DropAggregation() {}

  @Override
  @SuppressWarnings("unchecked")
  public  Aggregator createAggregator(
      InstrumentDescriptor instrumentDescriptor, ExemplarFilter exemplarFilter) {
    return (Aggregator) Aggregator.drop();
  }

  @Override
  public boolean isCompatibleWithInstrument(InstrumentDescriptor instrumentDescriptor) {
    return true;
  }

  @Override
  public String toString() {
    return "DropAggregation";
  }
}