2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2020 Nordix Foundation.
5 * ================================================================================
6 * Licensed under the Apache License, Version 2.0 (the "License");
7 * you may not use this file except in compliance with the License.
8 * You may obtain a copy of the License at
10 * http://www.apache.org/licenses/LICENSE-2.0
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
18 * SPDX-License-Identifier: Apache-2.0
19 * ============LICENSE_END=========================================================
22 package org.onap.policy.apex.client.editor.rest.handling;
24 import com.google.gson.Gson;
25 import com.google.gson.GsonBuilder;
26 import com.google.gson.JsonObject;
27 import java.util.ArrayList;
28 import java.util.List;
29 import org.onap.policy.apex.client.editor.rest.handling.bean.BeanModel;
30 import org.onap.policy.apex.model.basicmodel.concepts.AxKey;
31 import org.onap.policy.apex.model.basicmodel.concepts.AxKeyInfo;
32 import org.onap.policy.apex.model.modelapi.ApexApiResult;
33 import org.onap.policy.apex.model.modelapi.ApexApiResult.Result;
34 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
35 import org.slf4j.ext.XLogger;
36 import org.slf4j.ext.XLoggerFactory;
39 * This class handles commands on Apex models.
41 public class ModelHandler implements RestCommandHandler {
43 // Get a reference to the logger
44 private static final XLogger LOGGER = XLoggerFactory.getXLogger(ModelHandler.class);
46 // Recurring string constants
47 private static final String OK = ": OK";
48 private static final String NOT_OK = ": Not OK";
49 private static final String KEY = "key";
50 private static final String NAME = "name";
51 private static final String VERSION = "version";
52 private static final String UUID = "uuid";
53 private static final String DESCRIPTION = "description";
54 private static final String POLICY_KEY = "policyKey";
55 private static final String APEX_KEY_INFO = "apexKeyInfo";
61 public ApexApiResult executeRestCommand(final RestSession session, final RestCommandType commandType,
62 final RestCommand command) {
63 if (!RestCommandType.MODEL.equals(commandType)) {
64 return getUnsupportedCommandResultMessage(session, commandType, command);
69 return analyse(session);
71 return validate(session);
73 return getModelKey(session);
75 return listModel(session);
77 return downloadModel(session);
79 return deleteModel(session);
81 return getUnsupportedCommandResultMessage(session, commandType, command);
89 public ApexApiResult executeRestCommand(final RestSession session, final RestCommandType commandType,
90 final RestCommand command, final String jsonString) {
91 if (!RestCommandType.MODEL.equals(commandType)) {
92 return getUnsupportedCommandResultMessage(session, commandType, command);
97 return loadFromString(session, jsonString);
99 return createModel(session, jsonString);
101 return updateModel(session, jsonString);
103 return getUnsupportedCommandResultMessage(session, commandType, command);
111 public ApexApiResult executeRestCommand(final RestSession session, final RestCommandType commandType,
112 final RestCommand command, final String name, final String version) {
113 return getUnsupportedCommandResultMessage(session, commandType, command);
117 * Load the model from a JSON string for this session.
119 * @param session the Apex model editing session
120 * @param jsonString the JSON string to be parsed. The returned value(s) will be similar to {@link AxPolicyModel},
121 * with merged {@linkplain AxKeyInfo} for the root object.
122 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
123 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
125 private ApexApiResult loadFromString(final RestSession session, final String jsonString) {
126 LOGGER.entry(jsonString);
130 ApexApiResult result = session.getApexModelEdited().loadFromString(jsonString);
132 if (result != null) {
133 session.finishSession(result.isOk());
134 LOGGER.exit("Model/Load" + (result.isOk() ? OK : NOT_OK));
141 * Analyse the model and return analysis results. If successful the analysis results will be available in the
142 * messages in the result.
144 * @param session the Apex model editing session
145 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
146 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
148 private ApexApiResult analyse(final RestSession session) {
151 ApexApiResult result = session.getApexModel().analyse();
153 LOGGER.exit("Model/Analyse" + (result != null && result.isOk() ? OK : NOT_OK));
158 * Validate the model and return validation results. If successful the validation results will be available in the
159 * messages in the result.
161 * @param session the Apex model editing session
162 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
163 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
165 private ApexApiResult validate(final RestSession session) {
168 ApexApiResult result = session.getApexModel().validate();
170 LOGGER.exit("Model/Validate" + (result != null && result.isOk() ? OK : NOT_OK));
175 * Creates the new model model for this session.
177 * @param session the Apex model editing session
178 * @param jsonString the JSON string to be parsed containing the new model. See {@linkplain BeanModel}
179 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
180 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
182 private ApexApiResult createModel(final RestSession session, final String jsonString) {
183 LOGGER.entry(jsonString);
185 final BeanModel jsonbean = RestUtils.getJsonParameters(jsonString, BeanModel.class);
189 ApexApiResult result = session.getApexModelEdited().createModel(jsonbean.getName(), jsonbean.getVersion(),
190 jsonbean.getUuid(), jsonbean.getDescription());
192 if (result != null) {
193 session.finishSession(result.isOk());
194 LOGGER.exit("Model/Create" + (result.isOk() ? OK : NOT_OK));
200 * Update the model for this session.
202 * @param session the Apex model editing session
203 * @param jsonString the JSON string to be parsed containing the updated model. See {@linkplain BeanModel}
204 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
205 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
207 private ApexApiResult updateModel(final RestSession session, final String jsonString) {
208 LOGGER.entry(jsonString);
210 final BeanModel jsonbean = RestUtils.getJsonParameters(jsonString, BeanModel.class);
214 ApexApiResult result = session.getApexModelEdited().updateModel(jsonbean.getName(), jsonbean.getVersion(),
215 jsonbean.getUuid(), jsonbean.getDescription());
217 if (result != null) {
218 session.finishSession(result.isOk());
219 LOGGER.exit("Model/Update" + (result.isOk() ? OK : NOT_OK));
226 * Gets the key for the model for this session. If successful the model key will be available in the first message
227 * in the result. See {@linkplain AxKey}
229 * @param session the Apex model editing session
230 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
231 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
233 private ApexApiResult getModelKey(final RestSession session) {
236 ApexApiResult result = session.getApexModel().getModelKey();
238 LOGGER.exit("Model/GetKey" + (result != null && result.isOk() ? OK : NOT_OK));
243 * Retrieve the model for this session. If successful the model will be available in the first message in the
244 * result. The returned value will be similar to a {@link AxPolicyModel}, with merged {@linkplain AxKeyInfo} for the
247 * @param session the Apex model editing session
248 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
249 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
251 private ApexApiResult listModel(final RestSession session) {
254 ApexApiResult result = session.getApexModel().listModel();
256 if (result != null) {
257 result = addKeyInfo2Messages(session, result);
258 LOGGER.exit("Model/Get" + (result.isOk() ? OK : NOT_OK));
264 * Download the model for this session as a String.
266 * @param session the Apex model editing session
267 * @return the model represented as a JSON string. See {@linkplain AxPolicyModel}
269 private ApexApiResult downloadModel(final RestSession session) {
272 ApexApiResult result = session.getApexModel().listModel();
274 LOGGER.exit("Model/Download" + (result != null && result.isOk() ? OK : NOT_OK));
279 * Delete the model for this session.
281 * @param session the Apex model editing session
282 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
283 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
285 private ApexApiResult deleteModel(final RestSession session) {
290 ApexApiResult result = session.getApexModel().deleteModel();
292 if (result != null) {
293 session.finishSession(result.isOk());
294 LOGGER.exit("Model/Delete" + (result.isOk() ? OK : NOT_OK));
301 * The json strings representing the objects listed, stored in result.messages[], does not contain the
302 * AxKeyInformation for that object. This utility method retrieves the AxKeyInfo for each object and adds it to the
303 * json for the object.
305 * @param session the Apex model editing session
306 * @param incomingResult The list result, containing JSON representations of objects stored in its "messages" array
307 * @return The list result, containing JSON augmented representations of objects stored in its "messages" array
309 private ApexApiResult addKeyInfo2Messages(final RestSession session, final ApexApiResult incomingResult) {
310 final ApexApiResult result = new ApexApiResult(incomingResult.getResult());
311 result.setMessages(incomingResult.getMessages());
313 final List<String> messages = incomingResult.getMessages();
314 final List<String> augmentedMessages = new ArrayList<>(messages.size());
316 for (final String message : messages) {
317 augmentedMessages.add(addKeyInfo2Message(session, message));
319 result.setMessages(augmentedMessages);
321 if (messages.size() != augmentedMessages.size()) {
322 result.setResult(Result.OTHER_ERROR);
323 result.addMessage("Failed to add KeyInfo to all results. Results are not complete");
330 * Augment a message with key information.
332 * @param session the Apex model editing session
333 * @param message The message to augment
334 * @return the augmented message
336 private String addKeyInfo2Message(final RestSession session, final String message) {
337 final Gson gson = new GsonBuilder().serializeNulls().enableComplexMapKeySerialization().create();
339 JsonObject jsonObject = gson.fromJson(message, JsonObject.class);
340 if (jsonObject == null) {
344 String name = readFieldFromJsonObject(jsonObject, NAME, null);
345 String version = readFieldFromJsonObject(jsonObject, VERSION, null);
347 if (name == null && version == null) {
348 JsonObject newJsonObject = getSubJsonObject(jsonObject);
350 if (newJsonObject != null) {
351 jsonObject = newJsonObject;
352 name = readFieldFromJsonObject(jsonObject, NAME, name);
353 version = readFieldFromJsonObject(jsonObject, VERSION, version);
357 if (name == null || version == null || !setUuidAndDescription(session, jsonObject, name, version)) {
358 jsonObject.addProperty(UUID, (String) null);
359 jsonObject.addProperty(DESCRIPTION, (String) null);
362 return gson.toJson(jsonObject);
366 * Get an embedded JSON object for the given JSON object.
368 * @param jsonObject the input JSON object
369 * @return the embedded JSON object
371 private JsonObject getSubJsonObject(JsonObject jsonObject) {
372 if (jsonObject.entrySet() != null && !jsonObject.entrySet().isEmpty()) {
373 return (JsonObject) jsonObject.entrySet().iterator().next().getValue();
380 * Condition a field so its key information can be looked up.
382 * @param jsonObject the object to query
383 * @param fieldTag the tag of the field to condition
384 * @param fieldValue the value of the field to condition
385 * @return field read from the json
387 private String readFieldFromJsonObject(final JsonObject jsonObject, final String fieldTag, final String value) {
388 String lookedupValue = value;
390 if (jsonObject != null && jsonObject.get(KEY) != null && jsonObject.get(KEY).isJsonObject()
391 && jsonObject.getAsJsonObject(KEY).get(fieldTag) != null) {
392 lookedupValue = jsonObject.getAsJsonObject(KEY).get(fieldTag).getAsString();
393 } else if (jsonObject != null && jsonObject.get(POLICY_KEY) != null && jsonObject.get(POLICY_KEY).isJsonObject()
394 && jsonObject.getAsJsonObject(POLICY_KEY).get(fieldTag) != null) {
395 lookedupValue = jsonObject.getAsJsonObject(POLICY_KEY).get(fieldTag).getAsString();
397 return lookedupValue;
401 * Look up the UUID and description in the key information for a concept.
403 * @param session the Apex editor session
404 * @param jsonObject the JSON object to place the fields in
405 * @param name the concept name to look up
406 * @param version the concept version to look up
408 private boolean setUuidAndDescription(final RestSession session, JsonObject jsonObject, String name,
410 // Look up the key information for the name and version
411 JsonObject keyInfoJsonObject = lookupKeyInfo(session, name, version);
412 if (keyInfoJsonObject == null || keyInfoJsonObject.get(APEX_KEY_INFO) != null) {
416 if (keyInfoJsonObject.get(APEX_KEY_INFO).getAsJsonObject().get("UUID") != null) {
417 jsonObject.addProperty(UUID,
418 keyInfoJsonObject.get(APEX_KEY_INFO).getAsJsonObject().get("UUID").getAsString());
420 jsonObject.addProperty(UUID, (String) null);
423 if (keyInfoJsonObject.get(APEX_KEY_INFO).getAsJsonObject().get(DESCRIPTION) != null) {
424 jsonObject.addProperty(DESCRIPTION,
425 keyInfoJsonObject.get(APEX_KEY_INFO).getAsJsonObject().get(DESCRIPTION).getAsString());
427 jsonObject.addProperty(DESCRIPTION, (String) null);
434 * Look up the key information for the given concept name and value.
436 * @param session the Apex editor session
437 * @param name the concept name to look up
438 * @param version the concept version to look up
439 * @return a JSON version of the concept key information
441 private JsonObject lookupKeyInfo(final RestSession session, final String name, final String version) {
442 final ApexApiResult keyInfoResult = session.getApexModel().listKeyInformation(name, version);
443 final List<String> keyInfoMessages = keyInfoResult.getMessages();
445 if (keyInfoResult.isNok() || keyInfoMessages == null || keyInfoMessages.isEmpty()) {
449 final Gson gson = new GsonBuilder().serializeNulls().enableComplexMapKeySerialization().create();
450 final String keyInfoJson = keyInfoMessages.get(0);
451 return gson.fromJson(keyInfoJson, JsonObject.class);