/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 Nordix Foundation.
* ================================================================================
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.models.base;
import java.util.List;
import java.util.Set;
import java.util.TreeSet;
import javax.persistence.EmbeddedId;
import javax.persistence.Entity;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.Table;
import lombok.Data;
import lombok.EqualsAndHashCode;
import lombok.NonNull;
import org.onap.policy.common.utils.validation.Assertions;
import org.onap.policy.models.base.PfValidationResult.ValidationResult;
/**
* This class is the base class for all models in the Policy Framework. All model classes inherit
* from this model so all models must have a key and have key information.
*
*
Validation checks that the model key is valid. It goes on to check for null keys and checks
* each key for uniqueness in the model. A check is carried out to ensure that an {@link PfKeyInfo}
* instance exists for every {@link PfConceptKey} key. For each {@link PfReferenceKey} instance, a
* check is made that its parent and local name are nut null and that a {@link PfKeyInfo} entry
* exists for its parent. Then a check is made that each used {@link PfConceptKey} and
* {@link PfReferenceKey} usage references a key that exists. Finally, a check is made to ensure
* that an {@link PfConceptKey} instance exists for every {@link PfKeyInfo} instance.
*
* @param the type of concept on which the interface is applied.
*/
@Entity
@Table(name = "PfModel")
@Inheritance(strategy = InheritanceType.TABLE_PER_CLASS)
@Data
@EqualsAndHashCode(callSuper = false)
public abstract class PfModel extends PfConcept {
private static final String IS_A_NULL_KEY = " is a null key";
private static final long serialVersionUID = -771659065637205430L;
@EmbeddedId
private PfConceptKey key;
/**
* The Default Constructor creates this concept with a NULL artifact key.
*/
public PfModel() {
this(new PfConceptKey());
}
/**
* Constructor to create this concept with the specified key.
*
* @param key the key of this concept
*/
public PfModel(@NonNull final PfConceptKey key) {
super();
Assertions.argumentNotNull(key, "key may not be null");
this.key = key;
}
/**
* Copy constructor.
*
* @param copyConcept the concept to copy from
*/
public PfModel(@NonNull final PfModel copyConcept) {
super(copyConcept);
}
/**
* Registers this model with the {@link PfModelService}. All models are registered with the
* model service so that models can be references from anywhere in the Policy Framework system
* without being passed as references through deep call chains.
*/
public abstract void register();
@Override
public List getKeys() {
return key.getKeys();
}
@Override
public void clean() {
key.clean();
}
@Override
public PfValidationResult validate(@NonNull final PfValidationResult resultIn) {
PfValidationResult result = resultIn;
if (key.isNullKey()) {
result.addValidationMessage(
new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID, "key is a null key"));
}
result = key.validate(result);
// Key consistency check
final Set artifactKeySet = new TreeSet<>();
final Set referenceKeySet = new TreeSet<>();
final Set usedKeySet = new TreeSet<>();
for (final PfKey pfKey : this.getKeys()) {
// Check for the two type of keys we have
if (pfKey instanceof PfConceptKey) {
result = validateArtifactKeyInModel((PfConceptKey) pfKey, artifactKeySet, result);
} else if (pfKey instanceof PfReferenceKey) {
result = validateReferenceKeyInModel((PfReferenceKey) pfKey, referenceKeySet, result);
}
// It must be a PfKeyUse, nothing else is legal
else {
usedKeySet.add((PfKeyUse) pfKey);
}
}
// Check all reference keys have correct parent keys
for (final PfReferenceKey referenceKey : referenceKeySet) {
if (!artifactKeySet.contains(referenceKey.getParentConceptKey())) {
result.addValidationMessage(new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID,
"parent artifact key not found for reference key " + referenceKey));
}
}
result = validateKeyUses(usedKeySet, artifactKeySet, referenceKeySet, result);
return result;
}
/**
* Check for consistent usage of an artifact key in the model.
*
* @param artifactKey The artifact key to check
* @param artifactKeySet The set of artifact keys encountered so far, this key is appended to
* the set
* @param result The validation result to append to
* @return the result of the validation
*/
private PfValidationResult validateArtifactKeyInModel(final PfConceptKey artifactKey,
final Set artifactKeySet, final PfValidationResult result) {
// Null key check
if (artifactKey.isNullKey()) {
result.addValidationMessage(new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID,
"key " + artifactKey + IS_A_NULL_KEY));
}
// Null key name start check
if (artifactKey.getName().toUpperCase().startsWith(PfKey.NULL_KEY_NAME)) {
result.addValidationMessage(new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID,
"key " + artifactKey + " name starts with keyword " + PfKey.NULL_KEY_NAME));
}
// Unique key check
if (artifactKeySet.contains(artifactKey)) {
result.addValidationMessage(new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID,
"duplicate key " + artifactKey + " found"));
} else {
artifactKeySet.add(artifactKey);
}
return result;
}
/**
* Check for consistent usage of a reference key in the model.
*
* @param artifactKey The reference key to check
* @param referenceKeySet The set of reference keys encountered so far, this key is appended to
* the set
* @param result The validation result to append to
* @return the result of the validation
*/
private PfValidationResult validateReferenceKeyInModel(final PfReferenceKey referenceKey,
final Set referenceKeySet, final PfValidationResult result) {
// Null key check
if (referenceKey.isNullKey()) {
result.addValidationMessage(new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID,
"key " + referenceKey + IS_A_NULL_KEY));
}
// Null parent key check
if (referenceKey.getParentConceptKey().isNullKey()) {
result.addValidationMessage(new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID,
"parent artifact key of key " + referenceKey + IS_A_NULL_KEY));
}
// Null local name check
if (referenceKey.getLocalName().equals(PfKey.NULL_KEY_NAME)) {
result.addValidationMessage(new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID,
"key " + referenceKey + " has a null local name"));
}
// Null key name start check
if (referenceKey.getParentConceptKey().getName().toUpperCase().startsWith(PfKey.NULL_KEY_NAME)) {
result.addValidationMessage(new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID,
"key " + referenceKey + " parent name starts with keyword " + PfKey.NULL_KEY_NAME));
}
// Unique key check
if (referenceKeySet.contains(referenceKey)) {
result.addValidationMessage(new PfValidationMessage(key, this.getClass(), ValidationResult.INVALID,
"duplicate key " + referenceKey + " found"));
} else {
referenceKeySet.add(referenceKey);
}
return result;
}
/**
* Check for consistent usage of cross-key references in the model.
*
* @param usedKeySet The set of all keys used in the model
* @param artifactKeySet The set of artifact keys encountered so far, this key is appended to
* the set
* @param referenceKeySet The set of reference keys encountered so far, this key is appended to
* the set
* @param result The validation result to append to
* @return the result of the validation
*/
private PfValidationResult validateKeyUses(final Set usedKeySet, final Set artifactKeySet,
final Set referenceKeySet, final PfValidationResult result) {
// Check all key uses
for (final PfKeyUse usedKey : usedKeySet) {
if (usedKey.getKey() instanceof PfConceptKey) {
// PfConceptKey usage, check the key exists
if (!artifactKeySet.contains(usedKey.getKey())) {
result.addValidationMessage(new PfValidationMessage(usedKey.getKey(), this.getClass(),
ValidationResult.INVALID, "an artifact key used in the model is not defined"));
}
} else {
// PfReferenceKey usage, check the key exists
if (!referenceKeySet.contains(usedKey.getKey())) {
result.addValidationMessage(new PfValidationMessage(usedKey.getKey(), this.getClass(),
ValidationResult.INVALID, "a reference key used in the model is not defined"));
}
}
}
return result;
}
@Override
public int compareTo(final PfConcept otherObj) {
if (otherObj == null) {
return -1;
}
if (this == otherObj) {
return 0;
}
if (getClass() != otherObj.getClass()) {
return this.hashCode() - otherObj.hashCode();
}
final PfModel other = (PfModel) otherObj;
return key.compareTo(other.key);
}
@Override
public PfConcept copyTo(@NonNull final PfConcept target) {
Assertions.instanceOf(target, PfModel.class);
final PfModel copy = ((PfModel) target);
copy.setKey(new PfConceptKey(key));
return copy;
}
}