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.ambari.server.api.services;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  
  import jakarta.ws.rs.GET;
  import jakarta.ws.rs.Path;
  import jakarta.ws.rs.PathParam;
  import jakarta.ws.rs.Produces;
  import jakarta.ws.rs.core.Context;
  import jakarta.ws.rs.core.HttpHeaders;
  import jakarta.ws.rs.core.Response;
  import jakarta.ws.rs.core.UriInfo;
  
  import org.apache.ambari.annotations.ApiIgnore;
  import org.apache.ambari.server.api.resources.ResourceInstance;
  import org.apache.ambari.server.controller.spi.Resource;
  
  /**
   * Service for extensions management.
   *
   * An extension version is like a stack version but it contains custom services.  Linking an extension
   * version to the current stack version allows the cluster to install the custom services contained in
   * the extension version.
   */
  @Path("/extensions/")
  public class ExtensionsService extends BaseService {
  
    @GET @ApiIgnore // until documented
    @Produces("text/plain")
    public Response getExtensions(String body, @Context HttpHeaders headers, @Context UriInfo ui) {
  
      return handleRequest(headers, body, ui, Request.Type.GET,
          createExtensionResource(null));
    }
  
    @GET @ApiIgnore // until documented
    @Path("{extensionName}")
    @Produces("text/plain")
    public Response getExtension(String body, @Context HttpHeaders headers,
                             @Context UriInfo ui,
                             @PathParam("extensionName") String extensionName) {
  
      return handleRequest(headers, body, ui, Request.Type.GET,
          createExtensionResource(extensionName));
    }
  
    @GET @ApiIgnore // until documented
    @Path("{extensionName}/versions")
    @Produces("text/plain")
    public Response getExtensionVersions(String body,
                                     @Context HttpHeaders headers,
                                     @Context UriInfo ui, @PathParam("extensionName") String extensionName) {
  
      return handleRequest(headers, body, ui, Request.Type.GET,
          createExtensionVersionResource(extensionName, null));
    }
  
    @GET @ApiIgnore // until documented
    @Path("{extensionName}/versions/{extensionVersion}")
    @Produces("text/plain")
    public Response getExtensionVersion(String body,
                                    @Context HttpHeaders headers,
                                    @Context UriInfo ui, @PathParam("extensionName") String extensionName,
                                    @PathParam("extensionVersion") String extensionVersion) {
  
      return handleRequest(headers, body, ui, Request.Type.GET,
          createExtensionVersionResource(extensionName, extensionVersion));
    }
  
    @GET @ApiIgnore // until documented
    @Path("{extensionName}/versions/{extensionVersion}/links")
    @Produces("text/plain")
    public Response getExtensionVersionLinks(String body,
                                    @Context HttpHeaders headers,
                                    @Context UriInfo ui, @PathParam("extensionName") String extensionName,
                                    @PathParam("extensionVersion") String extensionVersion) {
  
      return handleRequest(headers, body, ui, Request.Type.GET,
          createExtensionLinkResource(null, null, extensionName, extensionVersion));
    }
  
    ResourceInstance createExtensionVersionResource(String extensionName,
                                                String extensionVersion) {
      Map<Resource.Type, String> mapIds = new HashMap<>();
      mapIds.put(Resource.Type.Extension, extensionName);
      mapIds.put(Resource.Type.ExtensionVersion, extensionVersion);
  
      return createResource(Resource.Type.ExtensionVersion, mapIds);
    }
  
    ResourceInstance createExtensionLinkResource(String stackName, String stackVersion,
                                    String extensionName, String extensionVersion) {
      Map<Resource.Type, String> mapIds = new HashMap<>();
      mapIds.put(Resource.Type.Stack, stackName);
      mapIds.put(Resource.Type.StackVersion, stackVersion);
      mapIds.put(Resource.Type.Extension, extensionName);
      mapIds.put(Resource.Type.ExtensionVersion, extensionVersion);
  
      return createResource(Resource.Type.ExtensionLink, mapIds);
    }
  
    ResourceInstance createExtensionResource(String extensionName) {
  
      return createResource(Resource.Type.Extension,
          Collections.singletonMap(Resource.Type.Extension, extensionName));
  
    }
  }
  