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.util;
  
  import java.io.IOException;
  import java.io.ObjectInputStream;
  import java.io.Serializable;
  import java.util.Arrays;
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /**
   * A wrapper around {@link Throwable} that preserves the stack trace on serialization, unlike
   * regular {@link Throwable}.
   */
  @SuppressWarnings({
    "nullness" // TODO(https://github.com/apache/beam/issues/20497)
  })
  public final class SerializableThrowable implements Serializable {
    private final @Nullable Throwable throwable;
    private final StackTraceElement @Nullable [] stackTrace;
  
    public SerializableThrowable(@Nullable Throwable t) {
      this.throwable = t;
      this.stackTrace = (t == null) ? null : t.getStackTrace();
    }
  
    public @Nullable Throwable getThrowable() {
      return throwable;
    }
  
    private void readObject(ObjectInputStream is) throws IOException, ClassNotFoundException {
      is.defaultReadObject();
      if (throwable != null) {
        throwable.setStackTrace(stackTrace);
      }
    }
  
    @Override
    public boolean equals(@Nullable Object o) {
      if (this == o) {
        return true;
      }
      if (o == null || getClass() != o.getClass()) {
        return false;
      }
      SerializableThrowable that = (SerializableThrowable) o;
      return Arrays.equals(stackTrace, that.stackTrace);
    }
  
    @Override
    public int hashCode() {
      return Arrays.hashCode(stackTrace);
    }
  }
  