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.image;
  
  import org.apache.kafka.common.config.ConfigResource;
  import org.apache.kafka.image.node.ConfigurationsImageNode;
  import org.apache.kafka.image.writer.ImageWriter;
  import org.apache.kafka.image.writer.ImageWriterOptions;
  
  import java.util.Collections;
  import java.util.Map;
  import java.util.Map.Entry;
  import java.util.Objects;
  import java.util.Properties;
  
  
  /**
   * Represents the configurations in the metadata image.
   *
   * This class is thread-safe.
   */
  public final class ConfigurationsImage {
      public static final ConfigurationsImage EMPTY =
          new ConfigurationsImage(Map.of());
  
      private final Map<ConfigResource, ConfigurationImage> data;
  
      public ConfigurationsImage(Map<ConfigResource, ConfigurationImage> data) {
          this.data = Collections.unmodifiableMap(data);
      }
  
      public boolean isEmpty() {
          return data.isEmpty();
      }
  
      public Map<ConfigResource, ConfigurationImage> resourceData() {
          return data;
      }
  
      public Properties configProperties(ConfigResource configResource) {
          ConfigurationImage configurationImage = data.get(configResource);
          if (configurationImage != null) {
              return configurationImage.toProperties();
          } else {
              return new Properties();
          }
      }
  
      /**
       * Return the underlying config data for a given resource as an immutable map. This does not apply
       * configuration overrides or include entity defaults for the resource type.
       */
      public Map<String, String> configMapForResource(ConfigResource configResource) {
          ConfigurationImage configurationImage = data.get(configResource);
          if (configurationImage != null) {
              return configurationImage.toMap();
          } else {
              return Map.of();
          }
      }
  
      public void write(ImageWriter writer, ImageWriterOptions options) {
          for (Entry<ConfigResource, ConfigurationImage> entry : data.entrySet()) {
              ConfigResource configResource = entry.getKey();
              ConfigurationImage configImage = entry.getValue();
              configImage.write(configResource, writer, options);
          }
      }
  
      @Override
      public boolean equals(Object o) {
          if (!(o instanceof ConfigurationsImage other)) return false;
          return data.equals(other.data);
      }
  
      @Override
      public int hashCode() {
          return Objects.hash(data);
      }
  
      @Override
      public String toString() {
          return new ConfigurationsImageNode(this).stringify();
      }
  }
  