| /* |
| * 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.qi4j.library.rest.client.api; |
| |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import org.qi4j.functional.Specification; |
| import org.qi4j.functional.Specifications; |
| import org.qi4j.library.rest.client.spi.ResponseHandler; |
| import org.restlet.Response; |
| import org.restlet.data.Status; |
| import org.restlet.resource.ResourceException; |
| |
| /** |
| * Implements a chained list of specification->handler. Add the most specific handlers first, and the most generic last. |
| */ |
| public class ErrorHandler |
| implements ResponseHandler |
| { |
| public static Specification<Response> AUTHENTICATION_REQUIRED = new Specification<Response>() |
| { |
| @Override |
| public boolean satisfiedBy( Response item ) |
| { |
| return item.getStatus().equals( Status.CLIENT_ERROR_UNAUTHORIZED ); |
| } |
| }; |
| |
| public static Specification<Response> RECOVERABLE_ERROR = new Specification<Response>() |
| { |
| @Override |
| public boolean satisfiedBy( Response item ) |
| { |
| return item.getStatus().isRecoverableError(); |
| } |
| }; |
| |
| LinkedHashMap<Specification<Response>, ResponseHandler> handlers = new LinkedHashMap<Specification<Response>, ResponseHandler>( ); |
| |
| public ErrorHandler() |
| { |
| } |
| |
| public ErrorHandler onError(Specification<Response> responseSpecification, ResponseHandler handler) |
| { |
| handlers.put( responseSpecification, handler ); |
| return this; |
| } |
| |
| public ErrorHandler onError(ResponseHandler handler) |
| { |
| handlers.put( Specifications.<Response>TRUE(), handler ); |
| return this; |
| } |
| |
| @Override |
| public HandlerCommand handleResponse( Response response, ContextResourceClient client ) |
| { |
| for( Map.Entry<Specification<Response>, ResponseHandler> specificationResponseHandlerEntry : handlers.entrySet() ) |
| { |
| if (specificationResponseHandlerEntry.getKey().satisfiedBy( response )) |
| { |
| return specificationResponseHandlerEntry.getValue().handleResponse( response, client ); |
| } |
| } |
| |
| // No handlers, throw exception |
| throw new ResourceException( response.getStatus() ); |
| } |
| } |