/*
* 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.graph.command.impl;
import org.jboss.errai.common.client.api.annotations.MapsTo;
import org.jboss.errai.common.client.api.annotations.Portable;
import org.kie.workbench.common.stunner.core.command.CommandResult;
import org.kie.workbench.common.stunner.core.command.util.CommandUtils;
import org.kie.workbench.common.stunner.core.graph.Edge;
import org.kie.workbench.common.stunner.core.graph.Node;
import org.kie.workbench.common.stunner.core.graph.command.GraphCommandExecutionContext;
import org.kie.workbench.common.stunner.core.graph.content.view.View;
import org.kie.workbench.common.stunner.core.rule.RuleViolation;
import org.uberfire.commons.validation.PortablePreconditions;
/**
* A Command which adds an edge into a graph and sets its target node.
*/
@Portable
public final class AddConnectorCommand extends AbstractGraphCompositeCommand {
private final String nodeUUID;
private final Edge edge;
private final Integer magnetIndex;
private transient Node<?, Edge> node;
public AddConnectorCommand(final @MapsTo("nodeUUID") String nodeUUID,
final @MapsTo("edge") Edge edge,
final @MapsTo("magnetIndex") Integer magnetIndex) {
this.nodeUUID = PortablePreconditions.checkNotNull("nodeUUID",
nodeUUID);
this.edge = PortablePreconditions.checkNotNull("edge",
edge);
this.magnetIndex = PortablePreconditions.checkNotNull("magnetIndex",
magnetIndex);
}
public AddConnectorCommand(final Node<?, Edge> sourceNode,
final Edge edge,
final Integer magnetIndex) {
this(sourceNode.getUUID(),
edge,
magnetIndex);
this.node = sourceNode;
}
@Override
@SuppressWarnings("unchecked")
protected AddConnectorCommand initialize(final GraphCommandExecutionContext context) {
super.initialize(context);
final Node<? extends View<?>, Edge> source = (Node<? extends View<?>, Edge>) getNode(context);
commands.add(new SetConnectionSourceNodeCommand(source,
edge,
magnetIndex));
return this;
}
@Override
public CommandResult<RuleViolation> allow(final GraphCommandExecutionContext context) {
// Add the edge into index, so child commands can find it.
getMutableIndex(context).addEdge(edge);
final CommandResult<RuleViolation> results = super.allow(context);
if (CommandUtils.isError(results)) {
// Remove the transient edge after the error.
getMutableIndex(context).removeEdge(edge);
}
return results;
}
@Override
@SuppressWarnings("unchecked")
public CommandResult<RuleViolation> execute(final GraphCommandExecutionContext context) {
// Add the edge into index, so child commands can find it.
getMutableIndex(context).addEdge(edge);
final CommandResult<RuleViolation> results = super.execute(context);
if (CommandUtils.isError(results)) {
// Remove the transient edge after the error.
getMutableIndex(context).removeEdge(edge);
}
return results;
}
@Override
@SuppressWarnings("unchecked")
public CommandResult<RuleViolation> undo(final GraphCommandExecutionContext context) {
final DeleteConnectorCommand undoCommand = new DeleteConnectorCommand(edge);
return undoCommand.execute(context);
}
@SuppressWarnings("unchecked")
private Node<?, Edge> getNode(final GraphCommandExecutionContext context) {
if (null == node) {
node = getNode(context,
nodeUUID);
}
return node;
}
public Edge getEdge() {
return edge;
}
public Integer getMagnetIndex() {
return magnetIndex;
}
public Node<?, Edge> getSourceNode() {
return node;
}
@Override
public String toString() {
return "AddEdgeCommand [target=" + nodeUUID + ", edge=" + edge.getUUID() + "]";
}
@Override
protected boolean delegateRulesContextToChildren() {
return true;
}
}