base/src/com/google/idea/blaze/base/scope/OutputSink.java

/*
 * Copyright 2016 The Bazel Authors. All rights reserved.
 *
 * Licensed 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 com.google.idea.blaze.base.scope;

import org.jetbrains.annotations.NotNull;

/**
 * An output sink registered with a context.
 *
 * <p>
 *
 * <p>Register these via a ScopeExtension.
 */
public interface OutputSink<T extends Output> {
  /** Whether to continue propagation */
  enum Propagation {
    Continue,
    Stop
  }

  /**
   * Called when an Output of the correct type goes through the scope.
   *
   * @return Whether to continue propagation of this input.
   */
  Propagation onOutput(@NotNull T output);
}