2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * ================================================================================
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 * SPDX-License-Identifier: Apache-2.0
18 * ============LICENSE_END=========================================================
21 package org.onap.policy.apex.tools.model.generator.model2event;
23 import java.util.HashSet;
24 import java.util.Properties;
27 import org.apache.avro.Schema;
28 import org.apache.avro.Schema.Field;
29 import org.apache.commons.lang3.Validate;
30 import org.onap.policy.apex.context.parameters.SchemaParameters;
31 import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
32 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
33 import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;
34 import org.onap.policy.apex.model.modelapi.ApexAPIResult;
35 import org.onap.policy.apex.model.modelapi.ApexModel;
36 import org.onap.policy.apex.model.modelapi.ApexModelFactory;
37 import org.onap.policy.apex.model.policymodel.concepts.AxPolicies;
38 import org.onap.policy.apex.model.policymodel.concepts.AxPolicy;
39 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
40 import org.onap.policy.apex.model.policymodel.concepts.AxState;
41 import org.onap.policy.apex.model.policymodel.concepts.AxStateOutput;
42 import org.onap.policy.apex.plugins.context.schema.avro.AvroSchemaHelperParameters;
43 import org.onap.policy.apex.tools.model.generator.SchemaUtils;
44 import org.stringtemplate.v4.ST;
45 import org.stringtemplate.v4.STGroup;
46 import org.stringtemplate.v4.STGroupFile;
49 * Takes a model and generates the JSON event schemas.
51 * @author Sven van der Meer (sven.van.der.meer@ericsson.com)
53 public class Model2JsonEventSchema {
55 /** Application name, used as prompt. */
56 private final String appName;
58 /** The file name of the policy model. */
59 private final String modelFile;
61 /** The type of events to generate: stimuli, response, internal. */
62 private final String type;
65 * Creates a new model to event schema generator.
67 * @param modelFile the model file to be used
68 * @param type the type of events to generate, one of: stimuli, response, internal
69 * @param appName application name for printouts
71 public Model2JsonEventSchema(final String modelFile, final String type, final String appName) {
72 Validate.notNull(modelFile, "Model2JsonEvent: given model file name was blank");
73 Validate.notNull(type, "Model2JsonEvent: given type was blank");
74 Validate.notNull(appName, "Model2JsonEvent: given application name was blank");
75 this.modelFile = modelFile;
77 this.appName = appName;
81 * Adds a type to a field for a given schema.
83 * @param schema the schema to add a type for
85 * @return a template with the type
87 protected ST addFieldType(final Schema schema, final STGroup stg) {
89 switch (schema.getType()) {
98 ret = stg.getInstanceOf("fieldTypeAtomic");
99 ret.add("type", schema.getType());
103 ret = stg.getInstanceOf("fieldTypeArray");
104 ret.add("array", this.addFieldType(schema.getElementType(), stg));
107 ret = stg.getInstanceOf("fieldTypeEnum");
108 ret.add("symbols", schema.getEnumSymbols());
112 ret = stg.getInstanceOf("fieldTypeMap");
113 ret.add("map", this.addFieldType(schema.getValueType(), stg));
117 ret = stg.getInstanceOf("fieldTypeRecord");
118 for (final Field field : schema.getFields()) {
119 final ST st = stg.getInstanceOf("field");
120 st.add("name", field.name());
121 st.add("type", this.addFieldType(field.schema(), stg));
122 ret.add("fields", st);
137 * Runs the application.
139 * @throws ApexException if any problem occurred in the model
140 * @return status of the application execution, 0 for success, positive integer for exit condition (such as help or
141 * version), negative integer for errors
143 public int runApp() throws ApexException {
144 final STGroupFile stg = new STGroupFile("org/onap/policy/apex/tools/model/generator/event-json.stg");
145 final ST stEvents = stg.getInstanceOf("events");
147 final ApexModelFactory factory = new ApexModelFactory();
148 final ApexModel model = factory.createApexModel(new Properties(), true);
150 final ApexAPIResult result = model.loadFromFile(modelFile);
151 if (result.isNOK()) {
152 System.err.println(appName + ": " + result.getMessage());
156 final AxPolicyModel policyModel = model.getPolicyModel();
157 policyModel.register();
158 new SchemaParameters().getSchemaHelperParameterMap().put("Avro", new AvroSchemaHelperParameters());
160 final Set<AxEvent> events = new HashSet<>();
161 final Set<AxArtifactKey> eventKeys = new HashSet<>();
162 final AxPolicies policies = policyModel.getPolicies();
165 for (final AxPolicy policy : policies.getPolicyMap().values()) {
166 final String firsState = policy.getFirstState();
167 for (final AxState state : policy.getStateMap().values()) {
168 if (state.getKey().getLocalName().equals(firsState)) {
169 eventKeys.add(state.getTrigger());
175 for (final AxPolicy policy : policies.getPolicyMap().values()) {
176 for (final AxState state : policy.getStateMap().values()) {
177 if (state.getNextStateSet().iterator().next().equals("NULL")) {
178 for (final AxStateOutput output : state.getStateOutputs().values()) {
179 eventKeys.add(output.getOutgingEvent());
186 for (final AxPolicy policy : policies.getPolicyMap().values()) {
187 final String firsState = policy.getFirstState();
188 for (final AxState state : policy.getStateMap().values()) {
189 if (state.getKey().getLocalName().equals(firsState)) {
192 if (state.getNextStateSet().iterator().next().equals("NULL")) {
195 for (final AxStateOutput output : state.getStateOutputs().values()) {
196 eventKeys.add(output.getOutgingEvent());
202 System.err.println(appName + ": unknown type <" + type + ">, cannot proceed");
206 for (final AxEvent event : policyModel.getEvents().getEventMap().values()) {
207 for (final AxArtifactKey key : eventKeys) {
208 if (event.getKey().equals(key)) {
214 for (final AxEvent event : events) {
215 final ST stEvent = stg.getInstanceOf("event");
216 stEvent.add("name", event.getKey().getName());
217 stEvent.add("nameSpace", event.getNameSpace());
218 stEvent.add("version", event.getKey().getVersion());
219 stEvent.add("source", event.getSource());
220 stEvent.add("target", event.getTarget());
222 final Schema avro = SchemaUtils.getEventSchema(event);
223 for (final Field field : avro.getFields()) {
224 // filter magic names
225 switch (field.name()) {
233 stEvent.add("fields", this.setField(field, stg));
236 stEvents.add("event", stEvent);
238 System.err.println(stEvents.render());
243 * Adds a field to the output.
245 * @param field the field from the event
247 * @return a template for the field
249 protected ST setField(final Field field, final STGroup stg) {
250 final ST st = stg.getInstanceOf("field");
251 switch (field.name()) {
259 st.add("name", field.name());
260 st.add("type", this.addFieldType(field.schema(), stg));