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.coders;
  
  import java.io.IOException;
  import java.io.InputStream;
  import java.io.OutputStream;
  import java.util.List;
  import org.apache.beam.sdk.values.TypeDescriptor;
  
  /**
   * Used only for tests.
   *
   * @param <T>
   */
  class MockDefaultCoder<T> extends CustomCoder<T> {
    private static final MockDefaultCoder INSTANCE = new MockDefaultCoder();
  
    @Override
    public void encode(T value, OutputStream outStream) throws IOException {}
  
    @Override
    public T decode(InputStream inStream) throws IOException {
      return null;
    }
  
    public static <T> MockDefaultCoder<T> of(Class<T> clazz) {
      return INSTANCE;
    }
  
    public static CoderProvider getCoderProvider() {
      return new MockAvroCoderProvider();
    }
  
    static class MockAvroCoderProvider extends CoderProvider {
      @Override
      public <T> Coder<T> coderFor(
          TypeDescriptor<T> typeDescriptor, List<? extends Coder<?>> componentCoders) {
        return (Coder<T>) MockDefaultCoder.INSTANCE;
      }
    }
  }
  