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.transforms.resourcehints;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /** Provides a definition of a resource hint known to the SDK. */
  public abstract class ResourceHint {
  
    /**
     * Reconciles values of a hint when the hint specified on a transform is also defined in an outer
     * context, for example on a composite transform, or specified in the transform's execution
     * environment. Override this method for a custom reconciliation logic. If isSum is true the merge
     * result will be flipped.
     */
    public ResourceHint mergeWithOuter(ResourceHint outer, boolean isSum) {
      // Defaults to the inner value as it is the most specific one.
      return this;
    }
  
    /** Defines how to represent the as bytestring. */
    public abstract byte[] toBytes();
  
    @Override
    public abstract boolean equals(@Nullable Object other);
  
    @Override
    public abstract int hashCode();
  }
  