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.persistence.Column;
27 import javax.persistence.EmbeddedId;
28 import javax.persistence.Entity;
29 import javax.persistence.Table;
30 import javax.xml.bind.annotation.XmlAccessType;
31 import javax.xml.bind.annotation.XmlAccessorType;
32 import javax.xml.bind.annotation.XmlElement;
33 import javax.xml.bind.annotation.XmlRootElement;
34 import javax.xml.bind.annotation.XmlType;
35 import lombok.AccessLevel;
37 import lombok.ToString;
38 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
39 import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
40 import org.onap.policy.apex.model.basicmodel.concepts.AxKey;
41 import org.onap.policy.apex.model.basicmodel.concepts.AxValidationMessage;
42 import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult;
43 import org.onap.policy.apex.model.basicmodel.concepts.AxValidationResult.ValidationResult;
44 import org.onap.policy.common.utils.validation.Assertions;
47 * This class holds a data schema definition in Apex. A data schema describes the structure of a single atom of data
48 * 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
49 * complex data type such as a Java object or an object described using a data definition language such as Avro. The
50 * schema flavour defines the type of schema being defined and the schema itself defines the schema. The schema flavour
51 * is used by Apex to look up and load a plugin class that understands and interprets the schema definition and can
52 * create instances of classes for the schema.
54 * <p>An {@link AxContextSchema} is used to define each parameter in Apex events, the messages that enter, exit, and are
55 * passed internally in Apex. In addition, an Apex {@link AxContextAlbum} instances hold a map of
56 * {@link AxContextSchema} instances to represent the context being managed as an {@link AxContextAlbum}. For example,
57 * the state of all cells in a mobile network might be represented as an {@link AxContextAlbum} with its
58 * {@link AxContextSchema} being defined as @code cell} objects.
60 * <p>Validation checks that the schema key is not null. It also checks that the schema flavour is defined and matches
61 * the regular expression SCHEMA_FLAVOUR_REGEXP. Finally, validation checks that the defined schema is not a blank or
65 @Table(name = "AxContextSchema")
70 @XmlAccessorType(XmlAccessType.FIELD)
71 @XmlRootElement(name = "apexContextSchema", namespace = "http://www.onap.org/policy/apex-pdp")
72 @XmlType(name = "AxContextSchema", namespace = "http://www.onap.org/policy/apex-pdp", propOrder =
73 { "key", "schemaFlavour", "schemaDefinition" })
75 public class AxContextSchema extends AxConcept {
76 private static final String SCHEMA_FLAVOUR = "schemaFlavour";
77 private static final String WHITESPACE_REGEXP = "\\s+$";
79 private static final long serialVersionUID = -6443016863162692288L;
81 /** Regular expression that constrains what values a schema flavour can have. */
82 public static final String SCHEMA_FLAVOUR_REGEXP = "[A-Za-z0-9\\-_]+";
84 /** An undefined schema flavour has this value. */
85 public static final String SCHEMA_FLAVOUR_UNDEFINED = "UNDEFINED";
87 /** The maximum permissible size of a schema definition. */
88 public static final int MAX_SCHEMA_SIZE = 32672; // The maximum size supported by Apache Derby
91 @XmlElement(name = "key", required = true)
92 private AxArtifactKey key;
94 @Column(name = SCHEMA_FLAVOUR)
95 @XmlElement(required = true)
96 private String schemaFlavour;
98 @Column(name = "schemaDefinition", length = MAX_SCHEMA_SIZE)
99 @XmlElement(name = "schemaDefinition", required = true)
100 @Getter(AccessLevel.NONE)
101 private String schemaDefinition;
104 * The default constructor creates a context schema with a null artifact key. The flavour of the context album is
105 * set as SCHEMA_FLAVOUR_UNDEFINED and the schema itself is defined as an empty string.
107 public AxContextSchema() {
108 this(new AxArtifactKey());
109 schemaFlavour = SCHEMA_FLAVOUR_UNDEFINED;
115 * @param copyConcept the concept to copy from
117 public AxContextSchema(final AxContextSchema copyConcept) {
122 * The key constructor creates a context schema with the given artifact key. The flavour of the context album is set
123 * as SCHEMA_FLAVOUR_UNDEFINED and the schema itself is defined as an empty string.
127 public AxContextSchema(final AxArtifactKey key) {
128 this(key, SCHEMA_FLAVOUR_UNDEFINED, "");
132 * This Constructor creates a context schema with all of its fields defined.
135 * @param schemaFlavour the schema flavour
136 * @param schemaDefinition the schema definition
138 public AxContextSchema(final AxArtifactKey key, final String schemaFlavour, final String schemaDefinition) {
140 Assertions.argumentNotNull(key, "key may not be null");
141 Assertions.argumentNotNull(schemaFlavour, "schemaFlavour may not be null");
142 Assertions.argumentNotNull(schemaDefinition, "schemaDefinition may not be null");
145 this.schemaFlavour = Assertions.validateStringParameter(SCHEMA_FLAVOUR, schemaFlavour, SCHEMA_FLAVOUR_REGEXP);
146 this.schemaDefinition = schemaDefinition.replaceAll(WHITESPACE_REGEXP, "");
153 public List<AxKey> getKeys() {
154 return key.getKeys();
158 * Sets the key of the context schema.
160 * @param key the key of the context schema
162 public void setKey(final AxArtifactKey key) {
163 Assertions.argumentNotNull(key, "key may not be null");
168 * Sets the schema flavour, which defines the type of schema definition being used.
170 * @param schemaFlavour the schema flavour
172 public void setSchemaFlavour(final String schemaFlavour) {
173 this.schemaFlavour = Assertions.validateStringParameter(SCHEMA_FLAVOUR, schemaFlavour, SCHEMA_FLAVOUR_REGEXP);
177 * Gets the schema, which defines the structure of this data schema atom.
179 * @return the schema definition
181 public String getSchema() {
182 return schemaDefinition;
186 * Sets the schema, which defines the structure of this data schema atom.
188 * @param schema the schema definition
190 public void setSchema(final String schema) {
191 Assertions.argumentNotNull(schema, "schema may not be null");
192 this.schemaDefinition = schema.replaceAll(WHITESPACE_REGEXP, "");
199 public AxValidationResult validate(final AxValidationResult resultIn) {
200 AxValidationResult result = resultIn;
202 if (key.equals(AxArtifactKey.getNullKey())) {
203 result.addValidationMessage(new AxValidationMessage(key, this.getClass(), ValidationResult.INVALID,
204 "key is a null key"));
207 result = key.validate(result);
209 if (schemaFlavour.replaceAll(WHITESPACE_REGEXP, "").length() == 0
210 || schemaFlavour.equals(SCHEMA_FLAVOUR_UNDEFINED)) {
211 result.addValidationMessage(new AxValidationMessage(key, this.getClass(), ValidationResult.INVALID,
212 "schema flavour is not defined"));
215 var flavourValidationResult = Assertions.getStringParameterValidationMessage(SCHEMA_FLAVOUR, schemaFlavour,
216 SCHEMA_FLAVOUR_REGEXP);
217 if (flavourValidationResult != null) {
218 result.addValidationMessage(new AxValidationMessage(key, this.getClass(), ValidationResult.INVALID,
219 "schema flavour invalid-" + flavourValidationResult));
222 if (schemaDefinition.replaceAll(WHITESPACE_REGEXP, "").length() == 0) {
223 result.addValidationMessage(new AxValidationMessage(key, this.getClass(), ValidationResult.INVALID,
224 "no schemaDefinition specified, schemaDefinition may not be blank"));
234 public void clean() {
236 schemaFlavour = Assertions.validateStringParameter(SCHEMA_FLAVOUR, schemaFlavour, SCHEMA_FLAVOUR_REGEXP);
237 schemaDefinition = schemaDefinition.replaceAll(WHITESPACE_REGEXP, "");
244 public AxConcept copyTo(final AxConcept target) {
245 Assertions.argumentNotNull(target, "target may not be null");
247 final Object copyObject = target;
248 Assertions.instanceOf(copyObject, AxContextSchema.class);
250 final AxContextSchema copy = ((AxContextSchema) copyObject);
251 copy.setKey(new AxArtifactKey(key));
252 copy.setSchemaFlavour(schemaFlavour);
253 copy.setSchema(schemaDefinition);
262 public int hashCode() {
263 final var prime = 31;
265 result = prime * result + key.hashCode();
266 result = prime * result + schemaFlavour.hashCode();
268 final String thisSchema = schemaDefinition.replace("\n", "");
269 result = prime * result + thisSchema.hashCode();
277 public boolean equals(final Object obj) {
285 if (getClass() != obj.getClass()) {
289 final AxContextSchema other = (AxContextSchema) obj;
291 if (!key.equals(other.key)) {
294 if (!schemaFlavour.equals(other.schemaFlavour)) {
297 return schemaDefinition.equals(other.schemaDefinition);
304 public int compareTo(final AxConcept otherObj) {
305 if (otherObj == null) {
308 if (this == otherObj) {
311 if (getClass() != otherObj.getClass()) {
312 return this.hashCode() - otherObj.hashCode();
315 final AxContextSchema other = (AxContextSchema) otherObj;
316 if (!key.equals(other.key)) {
317 return key.compareTo(other.key);
319 if (!schemaFlavour.equals(other.schemaFlavour)) {
320 return schemaFlavour.compareTo(other.schemaFlavour);
322 return schemaDefinition.compareTo(other.schemaDefinition);