services/dlab-webapp-common/src/main/java/com/epam/dlab/rest/mappers/RuntimeExceptionMapper.java

/*
 * 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 com.epam.dlab.rest.mappers;

import com.epam.dlab.rest.dto.ErrorDTO;
import lombok.extern.slf4j.Slf4j;

import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.Provider;

@Provider
@Slf4j
public class RuntimeExceptionMapper extends GenericExceptionMapper<RuntimeException> {

	@Override
	public Response toResponse(RuntimeException exception) {
		if (exception instanceof WebApplicationException) {
			return handleWebApplicationException(exception);
		}
		return super.toResponse(exception);
	}

	private Response handleWebApplicationException(RuntimeException exception) {
		WebApplicationException webAppException = (WebApplicationException) exception;

		if (webAppException.getResponse().getStatusInfo() == Response.Status.UNAUTHORIZED
				|| webAppException.getResponse().getStatusInfo() == Response.Status.FORBIDDEN) {

			return web(exception, Response.Status.UNAUTHORIZED);
		} else if (webAppException.getResponse().getStatusInfo() == Response.Status.NOT_FOUND) {
			return web(exception, Response.Status.NOT_FOUND);
		}

		return super.toResponse(exception);
	}

	private Response web(RuntimeException exception, Response.StatusType status) {
		log.error("Web application exception: {}", exception.getMessage(), exception);
		return Response.status(status)
				.type(MediaType.APPLICATION_JSON)
				.entity(new ErrorDTO(status.getStatusCode(), exception.getMessage()))
				.build();
	}
}