001/*
002 * #%L
003 * HAPI FHIR - Core Library
004 * %%
005 * Copyright (C) 2014 - 2023 Smile CDR, Inc.
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 *
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 *
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package ca.uhn.fhir.rest.api;
021
022import java.nio.charset.Charset;
023import java.nio.charset.StandardCharsets;
024import java.util.Arrays;
025import java.util.Collections;
026import java.util.HashMap;
027import java.util.HashSet;
028import java.util.Map;
029import java.util.Set;
030
031import static org.apache.commons.lang3.StringUtils.defaultIfBlank;
032
033public class Constants {
034
035        public static final String CT_TEXT_CSV = "text/csv";
036        public static final String HEADER_REQUEST_ID = "X-Request-ID";
037        public static final String HEADER_REQUEST_SOURCE = "X-Request-Source";
038        public static final String CACHE_CONTROL_MAX_RESULTS = "max-results";
039        public static final String CACHE_CONTROL_NO_CACHE = "no-cache";
040        public static final String CACHE_CONTROL_NO_STORE = "no-store";
041        public static final String CHARSET_NAME_UTF8 = "UTF-8";
042        public static final Charset CHARSET_UTF8;
043        public static final String CHARSET_UTF8_CTSUFFIX = "; charset=" + CHARSET_NAME_UTF8;
044        /**
045         * Contains a standard set of headers which are used by FHIR / HAPI FHIR, and therefore
046         * would make a useful set for CORS AllowedHeader declarations
047         */
048        public static final Set<String> CORS_ALLOWED_HEADERS;
049        /**
050         * Contains a standard set of HTTP Methods which are used by FHIR / HAPI FHIR, and therefore
051         * would make a useful set for CORS AllowedMethod declarations
052         */
053        public static final Set<String> CORS_ALLWED_METHODS;
054        public static final String CT_FHIR_JSON = "application/json+fhir";
055        public static final String CT_RDF_TURTLE = "application/x-turtle";
056        /**
057         * The FHIR MimeType for JSON encoding in FHIR DSTU3+
058         */
059        public static final String CT_FHIR_JSON_NEW = "application/fhir+json";
060        public static final String CT_FHIR_XML = "application/xml+fhir";
061
062
063        /**
064         * The FHIR MimeType for XML encoding in FHIR DSTU3+
065         */
066        public static final String CT_FHIR_XML_NEW = "application/fhir+xml";
067        public static final String CT_HTML = "text/html";
068        public static final String CT_HTML_WITH_UTF8 = "text/html" + CHARSET_UTF8_CTSUFFIX;
069        public static final String CT_JSON = "application/json";
070        public static final String CT_GRAPHQL = "application/graphql";
071        public static final String CT_JSON_PATCH = "application/json-patch+json";
072        public static final String CT_OCTET_STREAM = "application/octet-stream";
073        public static final String CT_TEXT = "text/plain";
074        public static final String CT_TEXT_WITH_UTF8 = CT_TEXT + CHARSET_UTF8_CTSUFFIX;
075        public static final String CT_TEXT_CDA = "text/xml+cda";
076        public static final String CT_X_FORM_URLENCODED = "application/x-www-form-urlencoded";
077        public static final String CT_XML = "application/xml";
078        public static final String CT_XML_PATCH = "application/xml-patch+xml";
079        public static final String ENCODING_GZIP = "gzip";
080        public static final String EXTOP_PROCESS_MESSAGE = "$process-message"; //Used in messaging
081        public static final String EXTOP_VALIDATE = "$validate";
082        public static final String EXTOP_VALIDATE_MODE = "mode";
083        public static final String EXTOP_VALIDATE_PROFILE = "profile";
084        public static final String EXTOP_VALIDATE_RESOURCE = "resource";
085        public static final String FORMAT_HTML = "html";
086        public static final String FORMAT_JSON = "json";
087        public static final String FORMAT_NDJSON = "ndjson";
088        public static final String FORMAT_XML = "xml";
089        public static final String CT_RDF_TURTLE_LEGACY = "text/turtle";
090        public static final String FORMAT_TURTLE = "ttl";
091
092
093        /**
094         * "text/html" and "html"
095         */
096        public static final Set<String> FORMATS_HTML;
097        public static final String FORMATS_HTML_JSON = "html/json";
098        public static final String FORMATS_HTML_XML = "html/xml";
099        public static final String FORMATS_HTML_TTL = "html/turtle";
100        public static final String HEADER_ACCEPT = "Accept";
101        public static final String HEADER_ACCEPT_ENCODING = "Accept-Encoding";
102        public static final String HEADER_ACCEPT_VALUE_JSON_NON_LEGACY = CT_FHIR_JSON_NEW + ";q=1.0, " + CT_FHIR_JSON + ";q=0.9";
103        public static final String HEADER_ACCEPT_VALUE_XML_NON_LEGACY = CT_FHIR_XML_NEW + ";q=1.0, " + CT_FHIR_XML + ";q=0.9";
104        public static final String HEADER_ACCEPT_VALUE_XML_OR_JSON_LEGACY = CT_FHIR_XML + ";q=1.0, " + CT_FHIR_JSON + ";q=1.0";
105        public static final String HEADER_ACCEPT_VALUE_XML_OR_JSON_NON_LEGACY = CT_FHIR_XML_NEW + ";q=1.0, " + CT_FHIR_JSON_NEW + ";q=1.0, " + HEADER_ACCEPT_VALUE_XML_OR_JSON_LEGACY.replace("1.0", "0.9");
106        public static final String HEADER_ALLOW = "Allow";
107        public static final String HEADER_AUTHORIZATION = "Authorization";
108        public static final String HEADER_AUTHORIZATION_VALPREFIX_BASIC = "Basic ";
109        public static final String HEADER_AUTHORIZATION_VALPREFIX_BEARER = "Bearer ";
110        public static final String HEADER_CACHE_CONTROL = "Cache-Control";
111        public static final String HEADER_CONTENT_DISPOSITION = "Content-Disposition";
112        public static final String HEADER_CONTENT_ENCODING = "Content-Encoding";
113        public static final String HEADER_CONTENT_LOCATION = "Content-Location";
114        public static final String HEADER_CONTENT_LOCATION_LC = HEADER_CONTENT_LOCATION.toLowerCase();
115        public static final String HEADER_CONTENT_TYPE = "Content-Type";
116        public static final String HEADER_CONTENT_TYPE_LC = HEADER_CONTENT_TYPE.toLowerCase();
117        public static final String HEADER_COOKIE = "Cookie";
118        public static final String HEADER_CORS_ALLOW_METHODS = "Access-Control-Allow-Methods";
119        public static final String HEADER_CORS_ALLOW_ORIGIN = "Access-Control-Allow-Origin";
120        public static final String HEADER_CORS_EXPOSE_HEADERS = "Access-Control-Expose-Headers";
121        public static final String HEADER_ETAG = "ETag";
122        public static final String HEADER_ETAG_LC = HEADER_ETAG.toLowerCase();
123        public static final String HEADER_IF_MATCH = "If-Match";
124        public static final String HEADER_IF_MATCH_LC = HEADER_IF_MATCH.toLowerCase();
125        public static final String HEADER_IF_MODIFIED_SINCE = "If-Modified-Since";
126        public static final String HEADER_IF_MODIFIED_SINCE_LC = HEADER_IF_MODIFIED_SINCE.toLowerCase();
127        public static final String HEADER_IF_NONE_EXIST = "If-None-Exist";
128        public static final String HEADER_IF_NONE_EXIST_LC = HEADER_IF_NONE_EXIST.toLowerCase();
129        public static final String HEADER_IF_NONE_MATCH = "If-None-Match";
130        public static final String HEADER_IF_NONE_MATCH_LC = HEADER_IF_NONE_MATCH.toLowerCase();
131        public static final String HEADER_LAST_MODIFIED = "Last-Modified";
132        public static final String HEADER_LAST_MODIFIED_LOWERCASE = HEADER_LAST_MODIFIED.toLowerCase();
133        public static final String HEADER_LOCATION = "Location";
134        public static final String HEADER_LOCATION_LC = HEADER_LOCATION.toLowerCase();
135        public static final String HEADER_ORIGIN = "Origin";
136        public static final String HEADER_PREFER = "Prefer";
137        public static final String HEADER_PREFER_HANDLING = "handling";
138        public static final String HEADER_PREFER_HANDLING_STRICT = "strict";
139        public static final String HEADER_PREFER_HANDLING_LENIENT = "lenient";
140        public static final String HEADER_PREFER_RETURN = "return";
141        public static final String HEADER_PREFER_RETURN_MINIMAL = "minimal";
142        public static final String HEADER_PREFER_RETURN_REPRESENTATION = "representation";
143        public static final String HEADER_PREFER_RETURN_OPERATION_OUTCOME = "OperationOutcome";
144        public static final String HEADER_SUFFIX_CT_UTF_8 = "; charset=UTF-8";
145        public static final String HEADERVALUE_CORS_ALLOW_METHODS_ALL = "GET, POST, PUT, DELETE, OPTIONS";
146        public static final String HEADER_REWRITE_HISTORY = "X-Rewrite-History";
147        public static final String HEADER_RETRY_ON_VERSION_CONFLICT = "X-Retry-On-Version-Conflict";
148        public static final String HEADER_MAX_RETRIES = "max-retries";
149        public static final String HEADER_RETRY = "retry";
150        public static final Map<Integer, String> HTTP_STATUS_NAMES;
151        public static final String LINK_FHIR_BASE = "fhir-base";
152        public static final String LINK_FIRST = "first";
153        public static final String LINK_LAST = "last";
154        public static final String LINK_NEXT = "next";
155        public static final String LINK_PREVIOUS = "previous";
156        public static final String LINK_SELF = "self";
157        public static final String OPENSEARCH_NS_OLDER = "http://purl.org/atompub/tombstones/1.0";
158        public static final String PARAM_ASYNC = "async"; //Used in messaging
159        public static final String PARAM_AT = "_at";
160        public static final String PARAM_ID= "_id";
161        /**
162         * Used in paging links
163         */
164        public static final String PARAM_BUNDLETYPE = "_bundletype";
165        public static final String PARAM_FILTER = "_filter";
166        public static final String PARAM_CONTAINED = "_contained";
167        public static final String PARAM_CONTAINED_TYPE = "_containedType";
168        public static final String PARAM_CONTENT = "_content";
169        public static final String PARAM_COUNT = "_count";
170        public static final String PARAM_OFFSET = "_offset";
171        public static final String PARAM_DELETE = "_delete";
172        public static final String PARAM_ELEMENTS = "_elements";
173        public static final String PARAM_ELEMENTS_EXCLUDE_MODIFIER = ":exclude";
174        public static final String PARAM_FORMAT = "_format";
175        public static final String PARAM_HAS = "_has";
176        public static final String PARAM_HISTORY = "_history";
177        public static final String PARAM_INCLUDE = "_include";
178        public static final String PARAM_INCLUDE_QUALIFIER_RECURSE = ":recurse";
179        public static final String PARAM_INCLUDE_RECURSE = "_include" + PARAM_INCLUDE_QUALIFIER_RECURSE;
180        public static final String PARAM_INCLUDE_QUALIFIER_ITERATE = ":iterate";
181        public static final String PARAM_INCLUDE_ITERATE = "_include" + PARAM_INCLUDE_QUALIFIER_ITERATE;
182        public static final String PARAM_LASTUPDATED = "_lastUpdated";
183        public static final String PARAM_NARRATIVE = "_narrative";
184        public static final String PARAM_PAGINGACTION = "_getpages";
185        public static final String PARAM_PAGINGOFFSET = "_getpagesoffset";
186        public static final String PARAM_PRETTY = "_pretty";
187        public static final String PARAM_PRETTY_VALUE_FALSE = "false";
188        public static final String PARAM_PRETTY_VALUE_TRUE = "true";
189        public static final String PARAM_PROFILE = "_profile";
190        public static final String PARAM_QUERY = "_query";
191        public static final String PARAM_RESPONSE_URL = "response-url"; //Used in messaging
192        public static final String PARAM_REVINCLUDE = "_revinclude";
193        public static final String PARAM_REVINCLUDE_RECURSE = PARAM_REVINCLUDE + PARAM_INCLUDE_QUALIFIER_RECURSE;
194        public static final String PARAM_REVINCLUDE_ITERATE = PARAM_REVINCLUDE + PARAM_INCLUDE_QUALIFIER_ITERATE;
195        public static final String PARAM_SEARCH = "_search";
196        public static final String PARAM_SECURITY = "_security";
197        public static final String PARAM_SINCE = "_since";
198        public static final String PARAM_SORT = "_sort";
199        public static final String PARAM_SORT_ASC = "_sort:asc";
200        public static final String PARAM_SORT_DESC = "_sort:desc";
201        public static final String PARAM_SOURCE = "_source";
202        public static final String PARAM_SUMMARY = "_summary";
203        public static final String PARAM_TAG = "_tag";
204        public static final String PARAM_LIST = "_list";
205        public static final String PARAM_TAGS = "_tags";
206        public static final String PARAM_TEXT = "_text";
207        public static final String PARAM_VALIDATE = "_validate";
208
209        /**
210         * $member-match operation
211         */
212        public static final String PARAM_MEMBER_PATIENT = "MemberPatient";
213        public static final String PARAM_MEMBER_IDENTIFIER = "MemberIdentifier";
214
215        public static final String PARAM_OLD_COVERAGE = "OldCoverage";
216        public static final String PARAM_NEW_COVERAGE = "NewCoverage";
217        public static final String PARAM_CONSENT = "Consent";
218        public static final String PARAM_MEMBER_PATIENT_NAME = PARAM_MEMBER_PATIENT + " Name";
219        public static final String PARAM_MEMBER_PATIENT_BIRTHDATE = PARAM_MEMBER_PATIENT + " Birthdate";
220        public static final String PARAM_CONSENT_PATIENT_REFERENCE = PARAM_CONSENT + "'s Patient Reference";
221        public static final String PARAM_CONSENT_PERFORMER_REFERENCE = PARAM_CONSENT + "'s Performer Reference";
222
223        public static final String PARAMQUALIFIER_MISSING = ":missing";
224        public static final String PARAMQUALIFIER_MISSING_FALSE = "false";
225        public static final String PARAMQUALIFIER_MISSING_TRUE = "true";
226        public static final String PARAMQUALIFIER_STRING_TEXT = ":text";
227        public static final String PARAMQUALIFIER_STRING_CONTAINS = ":contains";
228        public static final String PARAMQUALIFIER_STRING_EXACT = ":exact";
229        public static final String PARAMQUALIFIER_TOKEN_TEXT = ":text";
230        public static final String PARAMQUALIFIER_MDM = ":mdm";
231        public static final String PARAMQUALIFIER_NICKNAME = ":nickname";
232        public static final String PARAMQUALIFIER_TOKEN_OF_TYPE = ":of-type";
233        public static final String PARAMQUALIFIER_TOKEN_NOT = ":not";
234        public static final int STATUS_HTTP_200_OK = 200;
235        public static final int STATUS_HTTP_201_CREATED = 201;
236        public static final int STATUS_HTTP_204_NO_CONTENT = 204;
237        public static final int STATUS_HTTP_304_NOT_MODIFIED = 304;
238        public static final int STATUS_HTTP_400_BAD_REQUEST = 400;
239        public static final int STATUS_HTTP_401_CLIENT_UNAUTHORIZED = 401;
240        public static final int STATUS_HTTP_403_FORBIDDEN = 403;
241
242        public static final int STATUS_HTTP_404_NOT_FOUND = 404;
243        public static final int STATUS_HTTP_405_METHOD_NOT_ALLOWED = 405;
244        public static final int STATUS_HTTP_409_CONFLICT = 409;
245        public static final int STATUS_HTTP_410_GONE = 410;
246        public static final int STATUS_HTTP_412_PRECONDITION_FAILED = 412;
247        public static final int STATUS_HTTP_422_UNPROCESSABLE_ENTITY = 422;
248        public static final int STATUS_HTTP_500_INTERNAL_ERROR = 500;
249        public static final int STATUS_HTTP_501_NOT_IMPLEMENTED = 501;
250        public static final String TAG_SUBSETTED_CODE = "SUBSETTED";
251        public static final String TAG_SUBSETTED_SYSTEM_DSTU3 = "http://hl7.org/fhir/v3/ObservationValue";
252        public static final String TAG_SUBSETTED_SYSTEM_R4 = "http://terminology.hl7.org/CodeSystem/v3-ObservationValue";
253        public static final String URL_TOKEN_HISTORY = "_history";
254        public static final String URL_TOKEN_METADATA = "metadata";
255        public static final String OO_INFOSTATUS_PROCESSING = "processing";
256        public static final String PARAM_GRAPHQL_QUERY = "query";
257        public static final String HEADER_X_CACHE = "X-Cache";
258        public static final String HEADER_X_SECURITY_CONTEXT = "X-Security-Context";
259        public static final String POWERED_BY_HEADER = "X-Powered-By";
260        public static final Charset CHARSET_US_ASCII;
261        public static final String PARAM_PAGEID = "_pageId";
262        public static final String JAVA_VALIDATOR_DETAILS_SYSTEM = "http://hl7.org/fhir/java-core-messageId";
263        public static final String PARAM_SEARCH_TOTAL_MODE = "_total";
264        public static final String CAPABILITYSTATEMENT_WEBSOCKET_URL = "http://hl7.org/fhir/StructureDefinition/capabilitystatement-websocket";
265        public static final String PARAMETER_CASCADE_DELETE = "_cascade";
266        public static final String HEADER_CASCADE = "X-Cascade";
267        public static final String CASCADE_DELETE = "delete";
268        public static final int MAX_RESOURCE_NAME_LENGTH = 100;
269        public static final String CACHE_CONTROL_PRIVATE = "private";
270        public static final String CT_FHIR_NDJSON = "application/fhir+ndjson";
271        public static final String CT_APP_NDJSON = "application/ndjson";
272        public static final String CT_NDJSON = "ndjson";
273        public static final Set<String> CTS_NDJSON;
274        public static final String HEADER_PREFER_RESPOND_ASYNC = "respond-async";
275        public static final int STATUS_HTTP_412_PAYLOAD_TOO_LARGE = 413;
276        public static final String OPERATION_NAME_GRAPHQL = "$graphql";
277        /**
278         * Note that this constant is used in a number of places including DB column lengths! Be careful if you decide to change it.
279         */
280        public static final int REQUEST_ID_LENGTH = 16;
281        public static final int STATUS_HTTP_202_ACCEPTED = 202;
282        public static final String HEADER_X_PROGRESS = "X-Progress";
283        public static final String HEADER_RETRY_AFTER = "Retry-After";
284        /**
285         * Operation name for the $lastn operation
286         */
287        public static final String OPERATION_LASTN = "$lastn";
288        public static final String PARAM_FHIRPATH = "_fhirpath";
289        public static final String PARAM_TYPE = "_type";
290
291        /**
292         * {@link org.hl7.fhir.instance.model.api.IBaseResource#getUserData(String) User metadata key} used
293         * to store the partition ID (if any) associated with the given resource. Value for this
294         * key will be of type {@link ca.uhn.fhir.interceptor.model.RequestPartitionId}.
295         */
296        public static final String RESOURCE_PARTITION_ID = Constants.class.getName() + "_RESOURCE_PARTITION_ID";
297        public static final String PARTITION_IDS = "partitionIds";
298        public static final String CT_APPLICATION_GZIP = "application/gzip";
299        public static final String[] EMPTY_STRING_ARRAY = new String[0];
300        public static final String SUBSCRIPTION_MULTITYPE_PREFIX = "[";
301        public static final String SUBSCRIPTION_MULTITYPE_SUFFIX = "]";
302        public static final String SUBSCRIPTION_MULTITYPE_STAR = "*";
303        public static final String SUBSCRIPTION_STAR_CRITERIA = SUBSCRIPTION_MULTITYPE_PREFIX + SUBSCRIPTION_MULTITYPE_STAR + SUBSCRIPTION_MULTITYPE_SUFFIX;
304        public static final String INCLUDE_STAR = "*";
305        public static final String PARAMQUALIFIER_TOKEN_IN = ":in";
306        public static final String PARAMQUALIFIER_TOKEN_NOT_IN = ":not-in";
307        public static final String PARAMQUALIFIER_TOKEN_ABOVE = ":above";
308        public static final String PARAMQUALIFIER_TOKEN_BELOW = ":below";
309        /**
310         * The number of characters in a UUID (36)
311         */
312        public static final int UUID_LENGTH = 36;
313
314        /**
315         * Application configuration key used to enable or disable Hibernate Envers.
316         */
317        public static final String HIBERNATE_INTEGRATION_ENVERS_ENABLED = "hibernate.integration.envers.enabled";
318
319    static {
320                CHARSET_UTF8 = StandardCharsets.UTF_8;
321                CHARSET_US_ASCII = StandardCharsets.ISO_8859_1;
322
323                HashSet<String> ctsNdjson = new HashSet<>();
324                ctsNdjson.add(CT_FHIR_NDJSON);
325                ctsNdjson.add(CT_APP_NDJSON);
326                ctsNdjson.add(CT_NDJSON);
327                CTS_NDJSON = Collections.unmodifiableSet(ctsNdjson);
328
329                HashMap<Integer, String> statusNames = new HashMap<>();
330                statusNames.put(200, "OK");
331                statusNames.put(201, "Created");
332                statusNames.put(202, "Accepted");
333                statusNames.put(203, "Non-Authoritative Information");
334                statusNames.put(204, "No Content");
335                statusNames.put(205, "Reset Content");
336                statusNames.put(206, "Partial Content");
337                statusNames.put(207, "Multi-Status");
338                statusNames.put(208, "Already Reported");
339                statusNames.put(226, "IM Used");
340                statusNames.put(300, "Multiple Choices");
341                statusNames.put(301, "Moved Permanently");
342                statusNames.put(302, "Found");
343                statusNames.put(303, "See Other");
344                statusNames.put(304, "Not Modified");
345                statusNames.put(305, "Use Proxy");
346                statusNames.put(307, "Temporary Redirect");
347                statusNames.put(308, "Permanent Redirect");
348                statusNames.put(400, "Bad Request");
349                statusNames.put(401, "Unauthorized");
350                statusNames.put(402, "Payment Required");
351                statusNames.put(403, "Forbidden");
352                statusNames.put(404, "Not Found");
353                statusNames.put(405, "Method Not Allowed");
354                statusNames.put(406, "Not Acceptable");
355                statusNames.put(407, "Proxy Authentication Required");
356                statusNames.put(408, "Request Timeout");
357                statusNames.put(409, "Conflict");
358                statusNames.put(410, "Gone");
359                statusNames.put(411, "Length Required");
360                statusNames.put(412, "Precondition Failed");
361                statusNames.put(413, "Payload Too Large");
362                statusNames.put(414, "URI Too Long");
363                statusNames.put(415, "Unsupported Media Type");
364                statusNames.put(416, "Requested range not satisfiable");
365                statusNames.put(417, "Expectation Failed");
366                statusNames.put(418, "I'm a teapot");
367                statusNames.put(419, "Insufficient Space On Resource");
368                statusNames.put(420, "Method Failure");
369                statusNames.put(421, "Destination Locked");
370                statusNames.put(422, "Unprocessable Entity");
371                statusNames.put(423, "Locked");
372                statusNames.put(424, "Failed Dependency");
373                statusNames.put(426, "Upgrade Required");
374                statusNames.put(428, "Precondition Required");
375                statusNames.put(429, "Too Many Requests");
376                statusNames.put(431, "Request Header Fields Too Large");
377                statusNames.put(500, "Internal Server Error");
378                statusNames.put(501, "Not Implemented");
379                statusNames.put(502, "Bad Gateway");
380                statusNames.put(503, "Service Unavailable");
381                statusNames.put(504, "Gateway Timeout");
382                statusNames.put(505, "HTTP Version not supported");
383                statusNames.put(506, "Variant Also Negotiates");
384                statusNames.put(507, "Insufficient Storage");
385                statusNames.put(508, "Loop Detected");
386                statusNames.put(509, "Bandwidth Limit Exceeded");
387                statusNames.put(510, "Not Extended");
388                statusNames.put(511, "Network Authentication Required");
389                HTTP_STATUS_NAMES = Collections.unmodifiableMap(statusNames);
390
391                Set<String> formatsHtml = new HashSet<>();
392                formatsHtml.add(CT_HTML);
393                formatsHtml.add(FORMAT_HTML);
394                FORMATS_HTML = Collections.unmodifiableSet(formatsHtml);
395
396                // *********************************************************
397                // Update CorsInterceptor's constructor documentation if you change these:
398                // *********************************************************
399                HashSet<String> corsAllowedHeaders = new HashSet<>();
400                corsAllowedHeaders.add("Accept");
401                corsAllowedHeaders.add("Access-Control-Request-Headers");
402                corsAllowedHeaders.add("Access-Control-Request-Method");
403                corsAllowedHeaders.add("Cache-Control");
404                corsAllowedHeaders.add("Content-Type");
405                corsAllowedHeaders.add("Origin");
406                corsAllowedHeaders.add("Prefer");
407                corsAllowedHeaders.add("X-FHIR-Starter");
408                corsAllowedHeaders.add("X-Requested-With");
409                CORS_ALLOWED_HEADERS = Collections.unmodifiableSet(corsAllowedHeaders);
410
411                // *********************************************************
412                // Update CorsInterceptor's constructor documentation if you change these:
413                // *********************************************************
414                HashSet<String> corsAllowedMethods = new HashSet<>();
415                corsAllowedMethods.addAll(Arrays.asList("GET", "POST", "PUT", "DELETE", "OPTIONS", "PATCH"));
416                CORS_ALLWED_METHODS = Collections.unmodifiableSet(corsAllowedMethods);
417        }
418
419        public static String codeSystemWithDefaultDescription(String theSystem) {
420                return defaultIfBlank(theSystem, "(none)");
421        }
422}