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Apache CXF JAX-RS Service Description Swagger
/**
* 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.apache.cxf.jaxrs.swagger.openapi;
import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.logging.Logger;
import org.apache.cxf.Bus;
import org.apache.cxf.BusFactory;
import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.common.util.StringUtils;
import org.apache.cxf.helpers.CastUtils;
import org.apache.cxf.helpers.IOUtils;
import org.apache.cxf.jaxrs.ext.MessageContext;
import org.apache.cxf.jaxrs.json.basic.JsonMapObject;
import org.apache.cxf.jaxrs.json.basic.JsonMapObjectReaderWriter;
import org.apache.cxf.jaxrs.utils.ExceptionUtils;
import org.apache.cxf.jaxrs.utils.ResourceUtils;
public final class SwaggerToOpenApiConversionUtils {
private static final Logger LOG = LogUtils.getL7dLogger(SwaggerToOpenApiConversionUtils.class);
private static final List SIMPLE_TYPE_RELATED_PROPS =
Arrays.asList("format", "minimum", "maximum", "default");
private SwaggerToOpenApiConversionUtils() {
}
public static String getOpenApiFromSwaggerLoc(String loc) {
return getOpenApiFromSwaggerLoc(loc, null);
}
public static String getOpenApiFromSwaggerLoc(String loc, OpenApiConfiguration cfg) {
return getOpenApiFromSwaggerLoc(loc, cfg, BusFactory.getThreadDefaultBus());
}
public static String getOpenApiFromSwaggerLoc(String loc, OpenApiConfiguration cfg, Bus bus) {
try {
InputStream is = ResourceUtils.getResourceStream(loc, bus);
if (is == null) {
return null;
}
return getOpenApiFromSwaggerStream(is, cfg);
} catch (Exception ex) {
LOG.warning("Problem with processing a user model at " + loc + ", exception: "
+ ExceptionUtils.getStackTrace(ex));
}
return null;
}
public static String getOpenApiFromSwaggerStream(InputStream is) throws IOException {
return getOpenApiFromSwaggerStream(is, null);
}
public static String getOpenApiFromSwaggerStream(InputStream is, OpenApiConfiguration cfg) throws IOException {
return getOpenApiFromSwaggerJson(null, IOUtils.readStringFromStream(is), cfg);
}
public static String getOpenApiFromSwaggerJson(String json) throws IOException {
return getOpenApiFromSwaggerJson(null, json, null);
}
public static String getOpenApiFromSwaggerJson(
MessageContext ctx, String json, OpenApiConfiguration cfg) throws IOException {
JsonMapObjectReaderWriter readerWriter = new JsonMapObjectReaderWriter();
JsonMapObject sw2 = readerWriter.fromJsonToJsonObject(json);
JsonMapObject sw3 = new JsonMapObject();
// "openapi"
sw3.setProperty("openapi", "3.0.0");
// "servers"
setServersProperty(ctx, sw2, sw3);
// "info"
JsonMapObject infoObject = sw2.getJsonMapProperty("info");
if (infoObject != null) {
sw3.setProperty("info", infoObject);
}
// "tags"
List> tagsObject = sw2.getListMapProperty("tags");
if (tagsObject != null) {
sw3.setProperty("tags", tagsObject);
}
// paths
Map requestBodies = cfg != null && cfg.isCreateRequestBodies()
? new LinkedHashMap<>() : null;
setPathsProperty(sw2, sw3, requestBodies);
// components
setComponentsProperty(sw2, sw3, requestBodies);
// externalDocs
Object externalDocsObject = sw2.getProperty("externalDocs");
if (externalDocsObject != null) {
sw3.setProperty("externalDocs", externalDocsObject);
}
return readerWriter.toJson(sw3).replace("#/definitions/", "#/components/schemas/");
}
private static void setComponentsProperty(JsonMapObject sw2, JsonMapObject sw3,
Map requestBodies) {
JsonMapObject comps = new JsonMapObject();
JsonMapObject requestBodiesObj = new JsonMapObject();
if (requestBodies != null) {
for (Map.Entry entry : requestBodies.entrySet()) {
requestBodiesObj.setProperty(entry.getKey(), entry.getValue());
}
}
comps.setProperty("requestBodies", requestBodiesObj);
Object s2Defs = sw2.getProperty("definitions");
if (s2Defs != null) {
comps.setProperty("schemas", s2Defs);
}
JsonMapObject s2SecurityDefs = sw2.getJsonMapProperty("securityDefinitions");
if (s2SecurityDefs != null) {
comps.setProperty("securitySchemes", s2SecurityDefs);
for (String property : s2SecurityDefs.asMap().keySet()) {
JsonMapObject securityScheme = s2SecurityDefs.getJsonMapProperty(property);
if ("basic".equals(securityScheme.getStringProperty("type"))) {
securityScheme.setProperty("type", "http");
securityScheme.setProperty("scheme", "basic");
}
}
}
sw3.setProperty("components", comps);
}
private static void setPathsProperty(JsonMapObject sw2, JsonMapObject sw3,
Map requestBodies) {
JsonMapObject sw2Paths = sw2.getJsonMapProperty("paths");
for (Map.Entry sw2PathEntries : sw2Paths.asMap().entrySet()) {
JsonMapObject sw2PathVerbs = new JsonMapObject(CastUtils.cast((Map)sw2PathEntries.getValue()));
for (Map.Entry sw2PathVerbEntries : sw2PathVerbs.asMap().entrySet()) {
JsonMapObject sw2PathVerbProps =
new JsonMapObject(CastUtils.cast((Map)sw2PathVerbEntries.getValue()));
prepareRequestBody(sw2PathVerbProps, requestBodies);
prepareResponses(sw2PathVerbProps);
}
}
sw3.setProperty("paths", sw2Paths);
}
private static void prepareResponses(JsonMapObject sw2PathVerbProps) {
List sw2PathVerbProduces =
CastUtils.cast((List)sw2PathVerbProps.removeProperty("produces"));
JsonMapObject sw3PathVerbResps = null;
JsonMapObject sw2PathVerbResps = sw2PathVerbProps.getJsonMapProperty("responses");
if (sw2PathVerbResps != null) {
sw3PathVerbResps = new JsonMapObject();
JsonMapObject okResp = null;
if (sw2PathVerbResps.containsProperty("200")) {
okResp = new JsonMapObject(CastUtils.cast((Map)sw2PathVerbResps.removeProperty("200")));
JsonMapObject newOkResp = new JsonMapObject();
String description = okResp.getStringProperty("description");
if (description != null) {
newOkResp.setProperty("description", description);
}
JsonMapObject schema = okResp.getJsonMapProperty("schema");
if (schema != null) {
JsonMapObject content = prepareContentFromSchema(schema, sw2PathVerbProduces, false);
if (content != null) {
newOkResp.setProperty("content", content);
}
}
JsonMapObject headers = okResp.getJsonMapProperty("headers");
if (headers != null) {
newOkResp.setProperty("headers", headers);
}
sw3PathVerbResps.setProperty("200", newOkResp);
}
for (Map.Entry entry : sw2PathVerbResps.asMap().entrySet()) {
sw3PathVerbResps.setProperty(entry.getKey(), entry.getValue());
}
sw2PathVerbProps.setProperty("responses", sw3PathVerbResps);
}
}
private static void prepareRequestBody(JsonMapObject sw2PathVerbProps,
Map requestBodies) {
List sw2PathVerbConsumes =
CastUtils.cast((List)sw2PathVerbProps.removeProperty("consumes"));
JsonMapObject sw3RequestBody = null;
List sw3formBody = null;
List> sw2PathVerbParamsList = sw2PathVerbProps.getListMapProperty("parameters");
if (sw2PathVerbParamsList != null) {
for (Iterator> it = sw2PathVerbParamsList.iterator(); it.hasNext();) {
JsonMapObject sw2PathVerbParamMap = new JsonMapObject(it.next());
if ("body".equals(sw2PathVerbParamMap.getStringProperty("in"))) {
it.remove();
sw3RequestBody = new JsonMapObject();
String description = sw2PathVerbParamMap.getStringProperty("description");
if (description != null) {
sw3RequestBody.setProperty("description", description);
}
Boolean required = sw2PathVerbParamMap.getBooleanProperty("required");
if (required != null) {
sw3RequestBody.setProperty("required", required);
}
JsonMapObject schema = sw2PathVerbParamMap.getJsonMapProperty("schema");
if (schema != null) {
JsonMapObject content = prepareContentFromSchema(schema, sw2PathVerbConsumes,
requestBodies != null);
if (content != null) {
sw3RequestBody.setProperty("content", content);
}
}
} else if ("formData".equals(sw2PathVerbParamMap.getStringProperty("in"))) {
it.remove();
if (sw3formBody == null) {
sw3formBody = new LinkedList<>();
sw3RequestBody = new JsonMapObject();
}
sw2PathVerbParamMap.removeProperty("in");
sw2PathVerbParamMap.removeProperty("required");
sw3formBody.add(sw2PathVerbParamMap);
} else if ("array".equals(sw2PathVerbParamMap.getStringProperty("type"))) {
sw2PathVerbParamMap.removeProperty("type");
sw2PathVerbParamMap.removeProperty("collectionFormat");
sw2PathVerbParamMap.setProperty("explode", true);
JsonMapObject items = sw2PathVerbParamMap.getJsonMapProperty("items");
sw2PathVerbParamMap.removeProperty("items");
JsonMapObject schema = new JsonMapObject();
schema.setProperty("type", "array");
schema.setProperty("items", items);
sw2PathVerbParamMap.setProperty("schema", schema);
} else {
if ("matrix".equals(sw2PathVerbParamMap.getStringProperty("in"))) {
sw2PathVerbParamMap.removeProperty("in");
sw2PathVerbParamMap.setProperty("in", "path");
sw2PathVerbParamMap.setProperty("style", "matrix");
}
String type = (String)sw2PathVerbParamMap.removeProperty("type");
Object enumK = sw2PathVerbParamMap.removeProperty("enum");
if (type != null) {
JsonMapObject schema = new JsonMapObject();
schema.setProperty("type", type);
if (enumK != null) {
schema.setProperty("enum", enumK);
}
for (String prop : SIMPLE_TYPE_RELATED_PROPS) {
Object value = sw2PathVerbParamMap.removeProperty(prop);
if (value != null) {
schema.setProperty(prop, value);
}
}
if ("password".equals(sw2PathVerbParamMap.getProperty("name"))) {
schema.setProperty("format", "password");
}
sw2PathVerbParamMap.setProperty("schema", schema);
}
}
}
}
if (sw2PathVerbParamsList.isEmpty()) {
sw2PathVerbProps.removeProperty("parameters");
}
if (sw3formBody != null) {
sw3RequestBody.setProperty("content", prepareFormContent(sw3formBody, sw2PathVerbConsumes));
}
if (sw3RequestBody != null) {
if (requestBodies == null || sw3formBody != null) {
sw2PathVerbProps.setProperty("requestBody", sw3RequestBody);
} else {
JsonMapObject content = sw3RequestBody.getJsonMapProperty("content");
if (content != null) {
String requestBodyName = (String)content.removeProperty("requestBodyName");
if (requestBodyName != null) {
requestBodies.put(requestBodyName, sw3RequestBody);
String ref = "#components/requestBodies/" + requestBodyName;
sw2PathVerbProps.setProperty("requestBody",
Collections.singletonMap("$ref", ref));
}
}
}
}
}
private static JsonMapObject prepareFormContent(List formList, List mediaTypes) {
String mediaType = StringUtils.isEmpty(mediaTypes)
? "application/x-www-form-urlencoded" : mediaTypes.get(0);
JsonMapObject content = new JsonMapObject();
JsonMapObject formType = new JsonMapObject();
JsonMapObject schema = new JsonMapObject();
schema.setProperty("type", "object");
JsonMapObject props = new JsonMapObject();
for (JsonMapObject prop : formList) {
String name = (String)prop.removeProperty("name");
props.setProperty(name, prop);
if ("file".equals(prop.getProperty("type"))) {
prop.setProperty("type", "string");
if (!prop.containsProperty("format")) {
prop.setProperty("format", "binary");
}
}
}
schema.setProperty("properties", props);
formType.setProperty("schema", schema);
content.setProperty(mediaType, formType);
return content;
}
private static JsonMapObject prepareContentFromSchema(JsonMapObject schema,
List mediaTypes,
boolean storeModelName) {
String type = schema.getStringProperty("type");
String modelName = null;
boolean isArray = false;
if (!"object".equals(type) || !"string".equals(type)) {
String ref = null;
JsonMapObject items = null;
if ("array".equals(type)) {
isArray = true;
items = schema.getJsonMapProperty("items");
ref = (String)items.getProperty("$ref");
} else {
ref = schema.getStringProperty("$ref");
}
if (ref != null) {
int index = ref.lastIndexOf('/');
modelName = ref.substring(index + 1);
if (items == null) {
schema.setProperty("$ref", "#components/schemas/" + modelName);
} else {
items.setProperty("$ref", "#components/schemas/" + modelName);
}
}
}
JsonMapObject content = new JsonMapObject();
List mediaTypesList = mediaTypes == null
? Collections.singletonList("application/json") : mediaTypes;
for (String mediaType : mediaTypesList) {
content.setProperty(mediaType,
Collections.singletonMap("schema", schema));
}
if (modelName != null && storeModelName) {
content.setProperty("requestBodyName", isArray ? modelName + "Array" : modelName);
}
// pass the model name via the content object
return content;
}
private static void setServersProperty(MessageContext ctx, JsonMapObject sw2, JsonMapObject sw3) {
URI requestURI = ctx == null ? null : URI.create(ctx.getHttpServletRequest().getRequestURL().toString());
List sw2Schemes = sw2.getListStringProperty("schemes");
String sw2Scheme;
if (StringUtils.isEmpty(sw2Schemes)) {
if (requestURI == null) {
sw2Scheme = "https";
} else {
sw2Scheme = requestURI.getScheme();
}
} else {
sw2Scheme = sw2Schemes.get(0);
}
String sw2Host = sw2.getStringProperty("host");
if (sw2Host == null && requestURI != null) {
sw2Host = requestURI.getHost() + ":" + requestURI.getPort();
}
String sw2BasePath = sw2.getStringProperty("basePath");
String sw3ServerUrl = sw2Scheme + "://" + sw2Host + sw2BasePath;
sw3.setProperty("servers", Collections.singletonList(Collections.singletonMap("url", sw3ServerUrl)));
}
}