/*
    * The contents of this file are subject to the terms of the Common Development and
    * Distribution License (the License). You may not use this file except in compliance with the
    * License.
    *
    * You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
    * specific language governing permission and limitations under the License.
    *
    * When distributing Covered Software, include this CDDL Header Notice in each file and include
   * the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
   * Header, with the fields enclosed by brackets [] replaced by your own identifying
   * information: "Portions copyright [year] [name of copyright owner]".
   *
   * Copyright 2012-2016 ForgeRock AS.
   */
  
  package org.forgerock.json.resource;
  
  import static org.forgerock.util.promise.Promises.newExceptionPromise;
  import static org.forgerock.util.promise.Promises.newResultPromise;
  
  import java.util.Collection;
  import java.util.LinkedList;
  
  import org.forgerock.services.context.Context;
  import org.forgerock.util.promise.Promise;
  
  /**
   * Implementation class for {@link Resources#asRequestHandler}.
   */
  class SynchronousRequestHandlerAdapter implements RequestHandler {
      private final SynchronousRequestHandler syncHandler;
  
      SynchronousRequestHandlerAdapter(final SynchronousRequestHandler syncHandler) {
          this.syncHandler = syncHandler;
      }
  
      @Override
      public Promise<ResourceResponse, ResourceException> handleUpdate(final Context context,
              final UpdateRequest request) {
          try {
              return newResultPromise(syncHandler.handleUpdate(context, request));
          } catch (final ResourceException e) {
              return newExceptionPromise(e);
          }
      }
  
      @Override
      public Promise<ResourceResponse, ResourceException> handleRead(final Context context,
              final ReadRequest request) {
          try {
              return newResultPromise(syncHandler.handleRead(context, request));
          } catch (final ResourceException e) {
              return newExceptionPromise(e);
          }
      }
  
      @Override
      public Promise<QueryResponse, ResourceException> handleQuery(final Context context,
              final QueryRequest request,
              final QueryResourceHandler handler) {
          try {
              final Collection<ResourceResponse> resources = new LinkedList<>();
              final QueryResponse result = syncHandler.handleQuery(context, request, resources);
              for (final ResourceResponse resource : resources) {
                  handler.handleResource(resource);
              }
              return newResultPromise(result);
          } catch (final ResourceException e) {
              return newExceptionPromise(e);
          }
      }
  
      @Override
      public Promise<ResourceResponse, ResourceException> handlePatch(final Context context,
              final PatchRequest request) {
          try {
              return newResultPromise(syncHandler.handlePatch(context, request));
          } catch (final ResourceException e) {
              return newExceptionPromise(e);
          }
      }
  
      @Override
      public Promise<ResourceResponse, ResourceException> handleDelete(final Context context,
              final DeleteRequest request) {
          try {
              return newResultPromise(syncHandler.handleDelete(context, request));
          } catch (final ResourceException e) {
              return newExceptionPromise(e);
          }
      }
  
      @Override
      public Promise<ResourceResponse, ResourceException> handleCreate(final Context context,
              final CreateRequest request) {
          try {
              return newResultPromise(syncHandler.handleCreate(context, request));
          } catch (final ResourceException e) {
             return newExceptionPromise(e);
         }
     }
 
     @Override
     public Promise<ActionResponse, ResourceException> handleAction(final Context context,
             final ActionRequest request) {
         try {
             return newResultPromise(syncHandler.handleAction(context, request));
         } catch (final ResourceException e) {
             return newExceptionPromise(e);
         }
     }
 }