2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2019-2020 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.gui.editors.apex.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.model.basicmodel.concepts.AxKey;
30 import org.onap.policy.apex.model.basicmodel.concepts.AxKeyInfo;
31 import org.onap.policy.apex.model.modelapi.ApexApiResult;
32 import org.onap.policy.apex.model.modelapi.ApexApiResult.Result;
33 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
34 import org.onap.policy.gui.editors.apex.rest.handling.bean.BeanModel;
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 uploadModel(session);
81 return deleteModel(session);
83 return getUnsupportedCommandResultMessage(session, commandType, command);
91 public ApexApiResult executeRestCommand(final RestSession session, final RestCommandType commandType,
92 final RestCommand command, final String jsonString) {
93 if (!RestCommandType.MODEL.equals(commandType)) {
94 return getUnsupportedCommandResultMessage(session, commandType, command);
99 return loadFromString(session, jsonString);
101 return createModel(session, jsonString);
103 return updateModel(session, jsonString);
105 return getUnsupportedCommandResultMessage(session, commandType, command);
113 public ApexApiResult executeRestCommand(final RestSession session, final RestCommandType commandType,
114 final RestCommand command, final String name, final String version) {
115 return getUnsupportedCommandResultMessage(session, commandType, command);
119 * Load the model from a JSON string for this session.
121 * @param session the Apex model editing session
122 * @param jsonString the JSON string to be parsed. The returned value(s) will be similar to {@link AxPolicyModel},
123 * with merged {@linkplain AxKeyInfo} for the root object.
124 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
125 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
127 private ApexApiResult loadFromString(final RestSession session, final String jsonString) {
128 LOGGER.entry(jsonString);
132 ApexApiResult result = session.loadFromString(jsonString);
134 session.finishSession(result.isOk());
136 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 session.finishSession(result.isOk());
194 LOGGER.exit("Model/Create" + (result.isOk() ? OK : NOT_OK));
199 * Update the model for this session.
201 * @param session the Apex model editing session
202 * @param jsonString the JSON string to be parsed containing the updated model. See {@linkplain BeanModel}
203 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
204 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
206 private ApexApiResult updateModel(final RestSession session, final String jsonString) {
207 LOGGER.entry(jsonString);
209 final BeanModel jsonbean = RestUtils.getJsonParameters(jsonString, BeanModel.class);
213 ApexApiResult result = session.getApexModelEdited().updateModel(jsonbean.getName(), jsonbean.getVersion(),
214 jsonbean.getUuid(), jsonbean.getDescription());
216 session.finishSession(result.isOk());
218 LOGGER.exit("Model/Update" + (result.isOk() ? OK : NOT_OK));
223 * Gets the key for the model for this session. If successful the model key will be available in the first message
224 * in the result. See {@linkplain AxKey}
226 * @param session the Apex model editing session
227 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
228 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
230 private ApexApiResult getModelKey(final RestSession session) {
233 ApexApiResult result = session.getApexModel().getModelKey();
235 LOGGER.exit("Model/GetKey" + (result != null && result.isOk() ? OK : NOT_OK));
240 * Retrieve the model for this session. If successful the model will be available in the first message in the
241 * result. The returned value will be similar to a {@link AxPolicyModel}, with merged {@linkplain AxKeyInfo} for the
244 * @param session the Apex model editing session
245 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
246 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
248 private ApexApiResult listModel(final RestSession session) {
251 ApexApiResult result = session.getApexModel().listModel();
253 result = addKeyInfo2Messages(session, result);
255 LOGGER.exit("Model/Get" + (result.isOk() ? OK : NOT_OK));
260 * Download the model for this session as a String.
262 * @param session the Apex model editing session
263 * @return the model represented as a JSON string. See {@linkplain AxPolicyModel}
265 private ApexApiResult downloadModel(final RestSession session) {
268 ApexApiResult result = session.downloadModel();
270 LOGGER.exit("Model/Download" + (result != null && result.isOk() ? OK : NOT_OK));
275 * Upload the model for this session to the configured URL.
277 * @param session the Apex model editing session
278 * @return a result indicating if the upload was successful or not
280 private ApexApiResult uploadModel(final RestSession session) {
283 ApexApiResult result = session.uploadModel();
285 LOGGER.exit("Model/Download" + (result != null && result.isOk() ? OK : NOT_OK));
290 * Delete the model for this session.
292 * @param session the Apex model editing session
293 * @return an ApexAPIResult object. If successful then {@link ApexApiResult#isOk()} will return true. Any
294 * messages/errors can be retrieved using {@link ApexApiResult#getMessages()}
296 private ApexApiResult deleteModel(final RestSession session) {
301 ApexApiResult result = session.getApexModel().deleteModel();
303 session.finishSession(result.isOk());
305 LOGGER.exit("Model/Delete" + (result.isOk() ? OK : NOT_OK));
310 * The json strings representing the objects listed, stored in result.messages[], does not contain the
311 * AxKeyInformation for that object. This utility method retrieves the AxKeyInfo for each object and adds it to the
312 * json for the object.
314 * @param session the Apex model editing session
315 * @param incomingResult The list result, containing JSON representations of objects stored in its "messages" array
316 * @return The list result, containing JSON augmented representations of objects stored in its "messages" array
318 private ApexApiResult addKeyInfo2Messages(final RestSession session, final ApexApiResult incomingResult) {
319 final ApexApiResult result = new ApexApiResult(incomingResult.getResult());
320 result.setMessages(incomingResult.getMessages());
322 final List<String> messages = incomingResult.getMessages();
323 final List<String> augmentedMessages = new ArrayList<>(messages.size());
325 for (final String message : messages) {
326 augmentedMessages.add(addKeyInfo2Message(session, message));
328 result.setMessages(augmentedMessages);
330 if (messages.size() != augmentedMessages.size()) {
331 result.setResult(Result.OTHER_ERROR);
332 result.addMessage("Failed to add KeyInfo to all results. Results are not complete");
339 * Augment a message with key information.
341 * @param session the Apex model editing session
342 * @param message The message to augment
343 * @return the augmented message
345 private String addKeyInfo2Message(final RestSession session, final String message) {
346 final Gson gson = new GsonBuilder().serializeNulls().enableComplexMapKeySerialization().create();
348 JsonObject jsonObject = gson.fromJson(message, JsonObject.class);
349 if (jsonObject == null) {
353 String name = readFieldFromJsonObject(jsonObject, NAME, null);
354 String version = readFieldFromJsonObject(jsonObject, VERSION, null);
356 if (name == null && version == null) {
357 JsonObject newJsonObject = getSubJsonObject(jsonObject);
359 if (newJsonObject != null) {
360 jsonObject = newJsonObject;
361 name = readFieldFromJsonObject(jsonObject, NAME, name);
362 version = readFieldFromJsonObject(jsonObject, VERSION, version);
366 if (name == null || version == null || !setUuidAndDescription(session, jsonObject, name, version)) {
367 jsonObject.addProperty(UUID, (String) null);
368 jsonObject.addProperty(DESCRIPTION, (String) null);
371 return gson.toJson(jsonObject);
375 * Get an embedded JSON object for the given JSON object.
377 * @param jsonObject the input JSON object
378 * @return the embedded JSON object
380 private JsonObject getSubJsonObject(JsonObject jsonObject) {
381 if (jsonObject.entrySet() != null && !jsonObject.entrySet().isEmpty()) {
382 return (JsonObject) jsonObject.entrySet().iterator().next().getValue();
389 * Condition a field so its key information can be looked up.
391 * @param jsonObject the object to query
392 * @param fieldTag the tag of the field to condition
393 * @param value the default value of the field to condition
394 * @return field read from the json
396 private String readFieldFromJsonObject(final JsonObject jsonObject, final String fieldTag, final String value) {
397 String lookedupValue = value;
399 if (jsonObject != null && jsonObject.get(KEY) != null && jsonObject.get(KEY).isJsonObject()
400 && jsonObject.getAsJsonObject(KEY).get(fieldTag) != null) {
401 lookedupValue = jsonObject.getAsJsonObject(KEY).get(fieldTag).getAsString();
402 } else if (jsonObject != null && jsonObject.get(POLICY_KEY) != null && jsonObject.get(POLICY_KEY).isJsonObject()
403 && jsonObject.getAsJsonObject(POLICY_KEY).get(fieldTag) != null) {
404 lookedupValue = jsonObject.getAsJsonObject(POLICY_KEY).get(fieldTag).getAsString();
406 return lookedupValue;
410 * Look up the UUID and description in the key information for a concept.
412 * @param session the Apex editor session
413 * @param jsonObject the JSON object to place the fields in
414 * @param name the concept name to look up
415 * @param version the concept version to look up
417 private boolean setUuidAndDescription(final RestSession session, JsonObject jsonObject, String name,
419 // Look up the key information for the name and version
420 JsonObject keyInfoJsonObject = lookupKeyInfo(session, name, version);
421 if (keyInfoJsonObject == null || keyInfoJsonObject.get(APEX_KEY_INFO) != null) {
425 if (keyInfoJsonObject.get(APEX_KEY_INFO).getAsJsonObject().get("UUID") != null) {
426 jsonObject.addProperty(UUID,
427 keyInfoJsonObject.get(APEX_KEY_INFO).getAsJsonObject().get("UUID").getAsString());
429 jsonObject.addProperty(UUID, (String) null);
432 if (keyInfoJsonObject.get(APEX_KEY_INFO).getAsJsonObject().get(DESCRIPTION) != null) {
433 jsonObject.addProperty(DESCRIPTION,
434 keyInfoJsonObject.get(APEX_KEY_INFO).getAsJsonObject().get(DESCRIPTION).getAsString());
436 jsonObject.addProperty(DESCRIPTION, (String) null);
443 * Look up the key information for the given concept name and value.
445 * @param session the Apex editor session
446 * @param name the concept name to look up
447 * @param version the concept version to look up
448 * @return a JSON version of the concept key information
450 private JsonObject lookupKeyInfo(final RestSession session, final String name, final String version) {
451 final ApexApiResult keyInfoResult = session.getApexModel().listKeyInformation(name, version);
452 final List<String> keyInfoMessages = keyInfoResult.getMessages();
454 if (keyInfoResult.isNok() || keyInfoMessages == null || keyInfoMessages.isEmpty()) {
458 final Gson gson = new GsonBuilder().serializeNulls().enableComplexMapKeySerialization().create();
459 final String keyInfoJson = keyInfoMessages.get(0);
460 return gson.fromJson(keyInfoJson, JsonObject.class);