/*
 * Copyright 2017 Google LLC
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 * modification, are permitted provided that the following conditions are
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 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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package com.google.api.gax.grpc;

import com.google.api.gax.rpc.ApiCallContext;
import com.google.api.gax.rpc.ApiException;
import com.google.api.gax.rpc.BidiStreamingCallable;
import com.google.api.gax.rpc.ClientStream;
import com.google.api.gax.rpc.ClientStreamReadyObserver;
import com.google.api.gax.rpc.ResponseObserver;
import com.google.api.gax.rpc.StatusCode;
import java.util.Set;

/**
 * Transforms all {@code Throwable}s thrown during a call into an instance of {@link ApiException}.
 *
 * <p>Package-private for internal use.
 */
final class GrpcExceptionBidiStreamingCallable<RequestT, ResponseT>
    extends BidiStreamingCallable<RequestT, ResponseT> {
  private final BidiStreamingCallable<RequestT, ResponseT> innerCallable;
  private final GrpcApiExceptionFactory exceptionFactory;

  GrpcExceptionBidiStreamingCallable(
      BidiStreamingCallable<RequestT, ResponseT> innerCallable,
      Set<StatusCode.Code> retryableCodes) {
    this.innerCallable = innerCallable;
    this.exceptionFactory = new GrpcApiExceptionFactory(retryableCodes);
  }

  @Override
  public ClientStream<RequestT> internalCall(
      final ResponseObserver<ResponseT> responseObserver,
      ClientStreamReadyObserver<RequestT> onReady,
      ApiCallContext context) {
    return innerCallable.internalCall(
        new ExceptionResponseObserver<>(responseObserver, exceptionFactory), onReady, context);
  }
}