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.extensions.euphoria.core.client.type;
  
  import java.util.Optional;
  import org.apache.beam.sdk.values.TypeDescriptor;
  
  /**
   * A collection of interfaces which allows access to {@link TypeDescriptor types} of implementing
   * {@link Operator Operators} properties.
   *
   * <p>Note that there is no input typing interface. That is on purpose since all the transformations
   * are chained together and type of input(s) equals to types of previous transform output(s). Source
   * transforms needs to know which type of elements are producing explicitly.
   */
  /** @deprecated Use Java SDK directly, Euphoria is scheduled for removal in a future release. */
  @Deprecated
  public class TypeAware {
  
    /** Returns {@link TypeDescriptor} of this operator output type. */
    public interface Output<OutputT> {
  
      Optional<TypeDescriptor<OutputT>> getOutputType();
    }
  
    /** Returns {@link TypeDescriptor} of this operator key type. */
    public interface Key<KeyT> {
  
      Optional<TypeDescriptor<KeyT>> getKeyType();
    }
  
    /** Returns {@link TypeDescriptor} of this operator value type. */
    public interface Value<ValueT> {
  
      Optional<TypeDescriptor<ValueT>> getValueType();
    }
  }
  