runners/core-java/src/main/java/org/apache/beam/runners/core/triggers/AfterSynchronizedProcessingTimeStateMachine.java

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 * 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
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package org.apache.beam.runners.core.triggers;

import java.util.Collections;
import java.util.List;
import javax.annotation.Nullable;
import org.apache.beam.sdk.state.TimeDomain;
import org.apache.beam.sdk.transforms.SerializableFunction;
import org.apache.beam.vendor.guava.v20_0.com.google.common.base.Objects;
import org.joda.time.Instant;

// This should not really have the superclass https://issues.apache.org/jira/browse/BEAM-1486
class AfterSynchronizedProcessingTimeStateMachine extends AfterDelayFromFirstElementStateMachine {

  public static AfterSynchronizedProcessingTimeStateMachine ofFirstElement() {
    return new AfterSynchronizedProcessingTimeStateMachine();
  }

  @Override
  @Nullable
  public Instant getCurrentTime(TriggerStateMachine.TriggerContext context) {
    return context.currentSynchronizedProcessingTime();
  }

  private AfterSynchronizedProcessingTimeStateMachine() {
    super(TimeDomain.SYNCHRONIZED_PROCESSING_TIME, Collections.emptyList());
  }

  @Override
  public String toString() {
    return "AfterSynchronizedProcessingTime.pastFirstElementInPane()";
  }

  @Override
  public boolean equals(Object obj) {
    return this == obj || obj instanceof AfterSynchronizedProcessingTimeStateMachine;
  }

  @Override
  public int hashCode() {
    return Objects.hashCode(AfterSynchronizedProcessingTimeStateMachine.class);
  }

  @Override
  protected AfterSynchronizedProcessingTimeStateMachine newWith(
      List<SerializableFunction<Instant, Instant>> transforms) {
    // ignore transforms
    return this;
  }
}