2 * ============LICENSE_START=======================================================
3 * Copyright (C) 2016-2018 Ericsson. All rights reserved.
4 * Modifications Copyright (C) 2019-2022 Nordix Foundation.
5 * Modifications Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
6 * ================================================================================
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
19 * SPDX-License-Identifier: Apache-2.0
20 * ============LICENSE_END=========================================================
23 package org.onap.policy.apex.model.contextmodel.concepts;
25 import java.util.List;
26 import javax.xml.bind.annotation.XmlAccessType;
27 import javax.xml.bind.annotation.XmlAccessorType;
28 import javax.xml.bind.annotation.XmlElement;
29 import javax.xml.bind.annotation.XmlRootElement;
30 import javax.xml.bind.annotation.XmlType;
31 import lombok.AccessLevel;
33 import lombok.ToString;
34 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
35 import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
36 import org.onap.policy.apex.model.basicmodel.concepts.AxKey;
37 import org.onap.policy.apex.model.basicmodel.concepts.AxValidationMessage;
38 import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult;
39 import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult.ValidationResult;
40 import org.onap.policy.common.utils.validation.Assertions;
43 * This class holds a data schema definition in Apex. A data schema describes the structure of a single atom of data
44 * handled by Apex. This atom of data can be a primitive type such as an integer or a string, or it can be a more
45 * complex data type such as a Java object or an object described using a data definition language such as Avro. The
46 * schema flavour defines the type of schema being defined and the schema itself defines the schema. The schema flavour
47 * is used by Apex to look up and load a plugin class that understands and interprets the schema definition and can
48 * create instances of classes for the schema.
50 * <p>An {@link AxContextSchema} is used to define each parameter in Apex events, the messages that enter, exit, and are
51 * passed internally in Apex. In addition, an Apex {@link AxContextAlbum} instances hold a map of
52 * {@link AxContextSchema} instances to represent the context being managed as an {@link AxContextAlbum}. For example,
53 * the state of all cells in a mobile network might be represented as an {@link AxContextAlbum} with its
54 * {@link AxContextSchema} being defined as @code cell} objects.
56 * <p>Validation checks that the schema key is not null. It also checks that the schema flavour is defined and matches
57 * the regular expression SCHEMA_FLAVOUR_REGEXP. Finally, validation checks that the defined schema is not a blank or
63 @XmlAccessorType(XmlAccessType.FIELD)
64 @XmlRootElement(name = "apexContextSchema", namespace = "http://www.onap.org/policy/apex-pdp")
65 @XmlType(name = "AxContextSchema", namespace = "http://www.onap.org/policy/apex-pdp", propOrder =
66 { "key", "schemaFlavour", "schemaDefinition" })
68 public class AxContextSchema extends AxConcept {
69 private static final String SCHEMA_FLAVOUR = "schemaFlavour";
70 private static final String WHITESPACE_REGEXP = "\\s+$";
72 private static final long serialVersionUID = -6443016863162692288L;
74 /** Regular expression that constrains what values a schema flavour can have. */
75 public static final String SCHEMA_FLAVOUR_REGEXP = "[A-Za-z0-9\\-_]+";
77 /** An undefined schema flavour has this value. */
78 public static final String SCHEMA_FLAVOUR_UNDEFINED = "UNDEFINED";
80 /** The maximum permissible size of a schema definition. */
81 public static final int MAX_SCHEMA_SIZE = 32672; // The maximum size supported by Apache Derby
83 @XmlElement(name = "key", required = true)
84 private AxArtifactKey key;
86 @XmlElement(required = true)
87 private String schemaFlavour;
89 @XmlElement(name = "schemaDefinition", required = true)
90 @Getter(AccessLevel.NONE)
91 private String schemaDefinition;
94 * The default constructor creates a context schema with a null artifact key. The flavour of the context album is
95 * set as SCHEMA_FLAVOUR_UNDEFINED and the schema itself is defined as an empty string.
97 public AxContextSchema() {
98 this(new AxArtifactKey());
99 schemaFlavour = SCHEMA_FLAVOUR_UNDEFINED;
105 * @param copyConcept the concept to copy from
107 public AxContextSchema(final AxContextSchema copyConcept) {
112 * The key constructor creates a context schema with the given artifact key. The flavour of the context album is set
113 * as SCHEMA_FLAVOUR_UNDEFINED and the schema itself is defined as an empty string.
117 public AxContextSchema(final AxArtifactKey key) {
118 this(key, SCHEMA_FLAVOUR_UNDEFINED, "");
122 * This Constructor creates a context schema with all of its fields defined.
125 * @param schemaFlavour the schema flavour
126 * @param schemaDefinition the schema definition
128 public AxContextSchema(final AxArtifactKey key, final String schemaFlavour, final String schemaDefinition) {
130 Assertions.argumentNotNull(key, "key may not be null");
131 Assertions.argumentNotNull(schemaFlavour, "schemaFlavour may not be null");
132 Assertions.argumentNotNull(schemaDefinition, "schemaDefinition may not be null");
135 this.schemaFlavour = Assertions.validateStringParameter(SCHEMA_FLAVOUR, schemaFlavour, SCHEMA_FLAVOUR_REGEXP);
136 this.schemaDefinition = schemaDefinition.replaceAll(WHITESPACE_REGEXP, "");
143 public List<AxKey> getKeys() {
144 return key.getKeys();
148 * Sets the key of the context schema.
150 * @param key the key of the context schema
152 public void setKey(final AxArtifactKey key) {
153 Assertions.argumentNotNull(key, "key may not be null");
158 * Sets the schema flavour, which defines the type of schema definition being used.
160 * @param schemaFlavour the schema flavour
162 public void setSchemaFlavour(final String schemaFlavour) {
163 this.schemaFlavour = Assertions.validateStringParameter(SCHEMA_FLAVOUR, schemaFlavour, SCHEMA_FLAVOUR_REGEXP);
167 * Gets the schema, which defines the structure of this data schema atom.
169 * @return the schema definition
171 public String getSchema() {
172 return schemaDefinition;
176 * Sets the schema, which defines the structure of this data schema atom.
178 * @param schema the schema definition
180 public void setSchema(final String schema) {
181 Assertions.argumentNotNull(schema, "schema may not be null");
182 this.schemaDefinition = schema.replaceAll(WHITESPACE_REGEXP, "");
189 public AxValidationResult validate(final AxValidationResult resultIn) {
190 AxValidationResult result = resultIn;
192 if (key.equals(AxArtifactKey.getNullKey())) {
193 result.addValidationMessage(new AxValidationMessage(key, this.getClass(), ValidationResult.INVALID,
194 "key is a null key"));
197 result = key.validate(result);
199 if (schemaFlavour.replaceAll(WHITESPACE_REGEXP, "").length() == 0
200 || schemaFlavour.equals(SCHEMA_FLAVOUR_UNDEFINED)) {
201 result.addValidationMessage(new AxValidationMessage(key, this.getClass(), ValidationResult.INVALID,
202 "schema flavour is not defined"));
205 var flavourValidationResult = Assertions.getStringParameterValidationMessage(SCHEMA_FLAVOUR, schemaFlavour,
206 SCHEMA_FLAVOUR_REGEXP);
207 if (flavourValidationResult != null) {
208 result.addValidationMessage(new AxValidationMessage(key, this.getClass(), ValidationResult.INVALID,
209 "schema flavour invalid-" + flavourValidationResult));
212 if (schemaDefinition.replaceAll(WHITESPACE_REGEXP, "").length() == 0) {
213 result.addValidationMessage(new AxValidationMessage(key, this.getClass(), ValidationResult.INVALID,
214 "no schemaDefinition specified, schemaDefinition may not be blank"));
224 public void clean() {
226 schemaFlavour = Assertions.validateStringParameter(SCHEMA_FLAVOUR, schemaFlavour, SCHEMA_FLAVOUR_REGEXP);
227 schemaDefinition = schemaDefinition.replaceAll(WHITESPACE_REGEXP, "");
234 public AxConcept copyTo(final AxConcept target) {
235 Assertions.argumentNotNull(target, "target may not be null");
237 final Object copyObject = target;
238 Assertions.instanceOf(copyObject, AxContextSchema.class);
240 final AxContextSchema copy = ((AxContextSchema) copyObject);
241 copy.setKey(new AxArtifactKey(key));
242 copy.setSchemaFlavour(schemaFlavour);
243 copy.setSchema(schemaDefinition);
252 public int hashCode() {
253 final var prime = 31;
255 result = prime * result + key.hashCode();
256 result = prime * result + schemaFlavour.hashCode();
258 final String thisSchema = schemaDefinition.replace("\n", "");
259 result = prime * result + thisSchema.hashCode();
267 public boolean equals(final Object obj) {
275 if (getClass() != obj.getClass()) {
279 final AxContextSchema other = (AxContextSchema) obj;
281 if (!key.equals(other.key)) {
284 if (!schemaFlavour.equals(other.schemaFlavour)) {
287 return schemaDefinition.equals(other.schemaDefinition);
294 public int compareTo(final AxConcept otherObj) {
295 if (otherObj == null) {
298 if (this == otherObj) {
301 if (getClass() != otherObj.getClass()) {
302 return this.hashCode() - otherObj.hashCode();
305 final AxContextSchema other = (AxContextSchema) otherObj;
306 if (!key.equals(other.key)) {
307 return key.compareTo(other.key);
309 if (!schemaFlavour.equals(other.schemaFlavour)) {
310 return schemaFlavour.compareTo(other.schemaFlavour);
312 return schemaDefinition.compareTo(other.schemaDefinition);