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.kafka.connect.runtime.isolation;
  
  import org.apache.kafka.common.config.provider.ConfigProvider;
  import org.apache.kafka.connect.connector.policy.ConnectorClientConfigOverridePolicy;
  import org.apache.kafka.connect.rest.ConnectRestExtension;
  import org.apache.kafka.connect.sink.SinkConnector;
  import org.apache.kafka.connect.source.SourceConnector;
  import org.apache.kafka.connect.storage.Converter;
  import org.apache.kafka.connect.storage.HeaderConverter;
  import org.apache.kafka.connect.transforms.Transformation;
  import org.apache.kafka.connect.transforms.predicates.Predicate;
  
  import java.util.Arrays;
  import java.util.List;
  import java.util.SortedSet;
  import java.util.TreeSet;
  import java.util.function.Consumer;
  import java.util.function.Function;
  
  public class PluginScanResult {
      private final SortedSet<PluginDesc<SinkConnector>> sinkConnectors;
      private final SortedSet<PluginDesc<SourceConnector>> sourceConnectors;
      private final SortedSet<PluginDesc<Converter>> converters;
      private final SortedSet<PluginDesc<HeaderConverter>> headerConverters;
      private final SortedSet<PluginDesc<Transformation<?>>> transformations;
      private final SortedSet<PluginDesc<Predicate<?>>> predicates;
      private final SortedSet<PluginDesc<ConfigProvider>> configProviders;
      private final SortedSet<PluginDesc<ConnectRestExtension>> restExtensions;
      private final SortedSet<PluginDesc<ConnectorClientConfigOverridePolicy>> connectorClientConfigPolicies;
  
      private final List<SortedSet<? extends PluginDesc<?>>> allPlugins;
  
      public PluginScanResult(
              SortedSet<PluginDesc<SinkConnector>> sinkConnectors,
              SortedSet<PluginDesc<SourceConnector>> sourceConnectors,
              SortedSet<PluginDesc<Converter>> converters,
              SortedSet<PluginDesc<HeaderConverter>> headerConverters,
              SortedSet<PluginDesc<Transformation<?>>> transformations,
              SortedSet<PluginDesc<Predicate<?>>> predicates,
              SortedSet<PluginDesc<ConfigProvider>> configProviders,
              SortedSet<PluginDesc<ConnectRestExtension>> restExtensions,
              SortedSet<PluginDesc<ConnectorClientConfigOverridePolicy>> connectorClientConfigPolicies
      ) {
          this.sinkConnectors = sinkConnectors;
          this.sourceConnectors = sourceConnectors;
          this.converters = converters;
          this.headerConverters = headerConverters;
          this.transformations = transformations;
          this.predicates = predicates;
          this.configProviders = configProviders;
          this.restExtensions = restExtensions;
          this.connectorClientConfigPolicies = connectorClientConfigPolicies;
          this.allPlugins =
              Arrays.asList(sinkConnectors, sourceConnectors, converters, headerConverters, transformations, predicates,
                      configProviders, restExtensions, connectorClientConfigPolicies);
      }
  
      /**
       * Merge one or more {@link PluginScanResult results} into one result object
       */
      public PluginScanResult(List<PluginScanResult> results) {
          this(
                  merge(results, PluginScanResult::sinkConnectors),
                  merge(results, PluginScanResult::sourceConnectors),
                  merge(results, PluginScanResult::converters),
                  merge(results, PluginScanResult::headerConverters),
                  merge(results, PluginScanResult::transformations),
                  merge(results, PluginScanResult::predicates),
                  merge(results, PluginScanResult::configProviders),
                  merge(results, PluginScanResult::restExtensions),
                  merge(results, PluginScanResult::connectorClientConfigPolicies)
          );
      }
  
      private static <R extends Comparable<?>> SortedSet<R> merge(List<PluginScanResult> results, Function<PluginScanResult, SortedSet<R>> accessor) {
          SortedSet<R> merged = new TreeSet<>();
          for (PluginScanResult element : results) {
              merged.addAll(accessor.apply(element));
          }
          return merged;
      }
  
      public SortedSet<PluginDesc<SinkConnector>> sinkConnectors() {
          return sinkConnectors;
      }
  
      public SortedSet<PluginDesc<SourceConnector>> sourceConnectors() {
          return sourceConnectors;
      }
  
      public SortedSet<PluginDesc<Converter>> converters() {
          return converters;
      }
  
      public SortedSet<PluginDesc<HeaderConverter>> headerConverters() {
          return headerConverters;
      }
  
      public SortedSet<PluginDesc<Transformation<?>>> transformations() {
          return transformations;
      }
  
      public SortedSet<PluginDesc<Predicate<?>>> predicates() {
          return predicates;
      }
  
      public SortedSet<PluginDesc<ConfigProvider>> configProviders() {
          return configProviders;
      }
  
      public SortedSet<PluginDesc<ConnectRestExtension>> restExtensions() {
          return restExtensions;
      }
  
      public SortedSet<PluginDesc<ConnectorClientConfigOverridePolicy>> connectorClientConfigPolicies() {
          return connectorClientConfigPolicies;
      }
  
      public void forEach(Consumer<PluginDesc<?>> consumer) {
          allPlugins.forEach(plugins -> plugins.forEach(consumer));
      }
  
      public boolean isEmpty() {
          boolean isEmpty = true;
          for (SortedSet<?> plugins : allPlugins) {
              isEmpty = isEmpty && plugins.isEmpty();
          }
          return isEmpty;
      }
  }
  