EmptyConnectionViolation.java

/*
 * 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.violations;

import java.util.Optional;

import org.jboss.errai.common.client.api.annotations.MapsTo;
import org.jboss.errai.common.client.api.annotations.NonPortable;
import org.jboss.errai.common.client.api.annotations.Portable;
import org.kie.workbench.common.stunner.core.graph.Edge;
import org.kie.workbench.common.stunner.core.graph.Element;
import org.kie.workbench.common.stunner.core.graph.Node;
import org.kie.workbench.common.stunner.core.graph.content.view.View;

@Portable
public class EmptyConnectionViolation extends AbstractRuleViolation {

    private final String sourceUUID;
    private final String targetUUID;

    public EmptyConnectionViolation(final @MapsTo("sourceUUID") String sourceUUID,
                                    final @MapsTo("targetUUID") String targetUUID) {
        this.sourceUUID = sourceUUID;
        this.targetUUID = targetUUID;
    }

    @Override
    public Optional<Object[]> getArguments() {
        return Optional.of(new Object[]{getUUID(),
                sourceUUID,
                targetUUID});
    }

    @Override
    public String getMessage() {
        return "Empty Connection "
                + "[connector=" + getUUID()
                + "[source=" + sourceUUID
                + "[target=" + targetUUID
                + "]";
    }

    @NonPortable
    public static class Builder {

        public static EmptyConnectionViolation build(final Edge<? extends View<?>, ? extends Node> connector,
                                                     final Optional<Node<? extends View<?>, ? extends Edge>> sourceNode,
                                                     final Optional<Node<? extends View<?>, ? extends Edge>> targetNode) {
            // Violation objects are portable so avoid use of optionals, just null or not null.
            final String sourceUUID = sourceNode.map(Element::getUUID).orElse(null);
            final String targetUUID = targetNode.map(Element::getUUID).orElse(null);
            return (EmptyConnectionViolation) new EmptyConnectionViolation(sourceUUID,
                                                                           targetUUID)
                    .setUUID(connector.getUUID());
        }
    }
}