com.google.gerrit.extensions.restapi.RestReadView Maven / Gradle / Ivy
// Copyright (C) 2012 The Android Open Source Project
//
// 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.gerrit.extensions.restapi;
/**
* RestView to read a resource without modification.
*
* RestReadViews are invoked by the HTTP GET method.
*
* @param type of resource the view reads.
*/
public interface RestReadView extends RestView {
/**
* Process the view operation by reading from the resource.
*
* The value of the returned response is automatically converted to JSON unless it is a {@link
* BinaryResult}.
*
*
The returned response defines the status code that is returned to the client. For
* RestReadViews this is usually {@code 200 OK}, but other 2XX or 3XX status codes are also
* possible (e.g. {@link Response.Redirect} can be returned for {@code 302 Found}).
*
*
Throwing a subclass of {@link RestApiException} results in a 4XX response to the client. For
* any other exception the client will get a {@code 500 Internal Server Error} response.
*
* @param resource resource to read
* @return response to return to the client
* @throws AuthException the caller is not permitted to access this view.
* @throws BadRequestException the request was incorrectly specified and cannot be handled by this
* view.
* @throws ResourceConflictException the resource state does not permit this view to make the
* changes at this time.
* @throws Exception the implementation of the view failed. The exception will be logged and HTTP
* 500 Internal Server Error will be returned to the client.
*/
Response apply(R resource)
throws AuthException, BadRequestException, ResourceConflictException, Exception;
}