/*
* Copyright 2017 Red Hat, Inc. and/or its affiliates.
*
* 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.
*/
package org.kie.workbench.common.stunner.core.rule.handler.impl;
import java.util.Optional;
import javax.enterprise.context.ApplicationScoped;
import org.kie.workbench.common.stunner.core.rule.RuleEvaluationHandler;
import org.kie.workbench.common.stunner.core.rule.RuleViolations;
import org.kie.workbench.common.stunner.core.rule.context.CardinalityContext;
import org.kie.workbench.common.stunner.core.rule.context.EdgeCardinalityContext;
import org.kie.workbench.common.stunner.core.rule.impl.EdgeOccurrences;
import org.kie.workbench.common.stunner.core.rule.violations.DefaultRuleViolations;
import org.kie.workbench.common.stunner.core.rule.violations.EdgeCardinalityMaxRuleViolation;
import org.kie.workbench.common.stunner.core.rule.violations.EdgeCardinalityMinRuleViolation;
import org.kie.workbench.common.stunner.core.validation.Violation;
@ApplicationScoped
public class EdgeCardinalityEvaluationHandler implements RuleEvaluationHandler<EdgeOccurrences, EdgeCardinalityContext> {
@Override
public Class<EdgeOccurrences> getRuleType() {
return EdgeOccurrences.class;
}
@Override
public Class<EdgeCardinalityContext> getContextType() {
return EdgeCardinalityContext.class;
}
@Override
public boolean accepts(final EdgeOccurrences rule,
final EdgeCardinalityContext context) {
final EdgeCardinalityContext.Direction direction = rule.getDirection();
return context.getEdgeRole().equals(rule.getConnectorRole())
&& direction.equals(context.getDirection())
&& context.getRoles().contains(rule.getRole());
}
@Override
public RuleViolations evaluate(final EdgeOccurrences rule,
final EdgeCardinalityContext context) {
final DefaultRuleViolations results = new DefaultRuleViolations();
final int minOccurrences = rule.getMinOccurrences();
final int maxOccurrences = rule.getMaxOccurrences();
final int candidatesCount = context.getCandidateCount();
final Optional<CardinalityContext.Operation> operation = context.getOperation();
final EdgeCardinalityContext.Direction direction = rule.getDirection();
final Violation.Type type = operation
.filter(CardinalityContext.Operation.ADD::equals)
.isPresent() ? Violation.Type.ERROR : Violation.Type.WARNING;
final int _count = !operation.isPresent() ? candidatesCount :
(operation.get().equals(CardinalityContext.Operation.ADD) ? candidatesCount + 1 :
(candidatesCount > 0 ? candidatesCount - 1 : 0)
);
if (_count < minOccurrences) {
results.addViolation(new EdgeCardinalityMinRuleViolation(context.getRoles().toString(),
context.getEdgeRole(),
minOccurrences,
candidatesCount,
direction,
type));
} else if (maxOccurrences > -1 && _count > maxOccurrences) {
results.addViolation(new EdgeCardinalityMaxRuleViolation(context.getRoles().toString(),
context.getEdgeRole(),
maxOccurrences,
candidatesCount,
direction,
type));
}
return results;
}
}