org.bremersee.exception.RestApiExceptionParserImpl Maven / Gradle / Ivy
/*
* Copyright 2018 the original author or authors.
*
* 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 org.bremersee.exception;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.xml.XmlMapper;
import java.util.Collection;
import java.util.Map;
import lombok.extern.slf4j.Slf4j;
import org.bremersee.exception.model.RestApiException;
import org.bremersee.http.HttpHeadersHelper;
import org.bremersee.http.MediaTypeHelper;
import org.bremersee.http.converter.ObjectMapperHelper;
import org.springframework.http.HttpHeaders;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;
/**
* The default implementation of a http response parser that creates a {@link RestApiException}.
*
* @author Christian Bremer
*/
@Slf4j
public class RestApiExceptionParserImpl implements RestApiExceptionParser {
private final Jackson2ObjectMapperBuilder objectMapperBuilder;
/**
* Instantiates a new rest api exception parser.
*/
public RestApiExceptionParserImpl() {
this.objectMapperBuilder = null;
}
/**
* Instantiates a new rest api exception parser.
*
* @param objectMapperBuilder the object mapper builder
*/
@SuppressWarnings("unused")
public RestApiExceptionParserImpl(
Jackson2ObjectMapperBuilder objectMapperBuilder) {
this.objectMapperBuilder = objectMapperBuilder;
}
private ObjectMapper getJsonMapper() {
if (objectMapperBuilder != null) {
return objectMapperBuilder.build();
} else {
return ObjectMapperHelper.getJsonMapper();
}
}
private XmlMapper getXmlMapper() {
if (objectMapperBuilder != null) {
return objectMapperBuilder.createXmlMapper(true).build();
} else {
return ObjectMapperHelper.getXmlMapper();
}
}
@Override
public RestApiException parseException(
@Nullable final String response,
@Nullable final Map> headers) {
final HttpHeaders httpHeaders = HttpHeadersHelper.buildHttpHeaders(headers);
final String contentType = String.valueOf(httpHeaders.getContentType());
RestApiException restApiException = null;
try {
if (StringUtils.hasText(response) && MediaTypeHelper.canContentTypeBeJson(contentType)) {
restApiException = getJsonMapper().readValue(response, RestApiException.class);
}
} catch (Exception ignored) {
log.info("msg=[Response is not a 'RestApiException' as JSON.]");
}
try {
if (restApiException == null
&& StringUtils.hasText(response)
&& MediaTypeHelper.canContentTypeBeXml(contentType)) {
restApiException = getXmlMapper().readValue(response, RestApiException.class);
}
} catch (Exception ignored) {
log.debug("msg=[Response is not a 'RestApiException' as XML.]");
}
if (restApiException == null) {
restApiException = new RestApiException();
final String id = httpHeaders.getFirst(RestApiExceptionUtils.ID_HEADER_NAME);
if (StringUtils.hasText(id) && !RestApiExceptionUtils.NO_ID_VALUE.equals(id)) {
restApiException.setId(id);
}
final String timestamp = httpHeaders.getFirst(RestApiExceptionUtils.TIMESTAMP_HEADER_NAME);
restApiException.setTimestamp(RestApiExceptionUtils.parseHeaderValue(timestamp));
if (StringUtils.hasText(response)) {
restApiException.setMessage(response);
} else {
final String message = httpHeaders.getFirst(RestApiExceptionUtils.MESSAGE_HEADER_NAME);
restApiException.setMessage(
StringUtils.hasText(message) ? message : RestApiExceptionUtils.NO_MESSAGE_VALUE);
}
final String errorCode = httpHeaders.getFirst(RestApiExceptionUtils.CODE_HEADER_NAME);
if (StringUtils.hasText(errorCode)
&& !RestApiExceptionUtils.NO_ERROR_CODE_VALUE.equals(errorCode)) {
restApiException.setErrorCode(errorCode);
}
final String cls = httpHeaders.getFirst(RestApiExceptionUtils.CLASS_HEADER_NAME);
if (StringUtils.hasText(cls) && !RestApiExceptionUtils.NO_CLASS_VALUE.equals(cls)) {
restApiException.setClassName(cls);
}
}
return restApiException;
}
}