Method create

gson/src/test/java/com/google/gson/GsonTest.java:187–213

(Gson gson, TypeToken<T> type)

                  private volatile boolean isFirstCall = true;

                  @Override
                  public <T> TypeAdapter<T> create(Gson gson, TypeToken<T> type) {
                    if (isFirstCall) {
                      isFirstCall = false;

                      class="cm">// Create a separate thread which requests an adapter for the same type
                      class="cm">// This will cause this factory to return a different adapter instance than
                      class="cm">// the one it is currently creating
                      Thread thread =
                          new Thread() {
                            @Override
                            public void run() {
                              threadAdapter.set(gson.getAdapter(requestedType));
                            }
                          };
                      thread.start();
                      try {
                        thread.join();
                      } catch (InterruptedException e) {
                        throw new RuntimeException(e);
                      }
                    }

                    class="cm">// Create a new dummy adapter instance
                    adapterInstancesCreated.incrementAndGet();
                    return new DummyAdapter<>();
                  }
                })
            .create();