/**
* Copyright 2010 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.jbpm.ruleflow.core;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import org.jbpm.process.core.context.exception.CompensationScope;
import org.jbpm.process.core.context.exception.ExceptionScope;
import org.jbpm.process.core.context.swimlane.SwimlaneContext;
import org.jbpm.process.core.context.variable.VariableScope;
import org.jbpm.process.core.event.EventFilter;
import org.jbpm.workflow.core.impl.NodeContainerImpl;
import org.jbpm.workflow.core.impl.WorkflowProcessImpl;
import org.jbpm.workflow.core.node.ConstraintTrigger;
import org.jbpm.workflow.core.node.EndNode;
import org.jbpm.workflow.core.node.EventTrigger;
import org.jbpm.workflow.core.node.FaultNode;
import org.jbpm.workflow.core.node.StartNode;
import org.jbpm.workflow.core.node.Trigger;
import org.kie.api.definition.process.Node;
import org.kie.api.definition.process.NodeContainer;
public class RuleFlowProcess extends WorkflowProcessImpl {
public static final String RULEFLOW_TYPE = "RuleFlow";
private static final long serialVersionUID = 510l;
public RuleFlowProcess() {
setType(RULEFLOW_TYPE);
// TODO create contexts on request ?
VariableScope variableScope = new VariableScope();
addContext(variableScope);
setDefaultContext(variableScope);
SwimlaneContext swimLaneContext = new SwimlaneContext();
addContext(swimLaneContext);
setDefaultContext(swimLaneContext);
ExceptionScope exceptionScope = new ExceptionScope();
addContext(exceptionScope);
setDefaultContext(exceptionScope);
}
public VariableScope getVariableScope() {
return (VariableScope) getDefaultContext(VariableScope.VARIABLE_SCOPE);
}
public SwimlaneContext getSwimlaneContext() {
return (SwimlaneContext) getDefaultContext(SwimlaneContext.SWIMLANE_SCOPE);
}
public ExceptionScope getExceptionScope() {
return (ExceptionScope) getDefaultContext(ExceptionScope.EXCEPTION_SCOPE);
}
public CompensationScope getCompensationScope() {
return (CompensationScope) getDefaultContext(CompensationScope.COMPENSATION_SCOPE);
}
protected NodeContainer createNodeContainer() {
return new WorkflowProcessNodeContainer();
}
public List<Node> getStartNodes() {
return getStartNodes(this.getNodes());
}
public static List<Node> getStartNodes(Node[] nodes) {
List<Node> startNodes = new ArrayList<Node>();
for (Node node : nodes) {
if (node instanceof StartNode) {
startNodes.add(node);
}
}
return startNodes;
}
public List<Node> getEndNodes() {
return getEndNodes(this.getNodes());
}
public static List<Node> getEndNodes(Node[] nodes) {
final List<Node> endNodes = new ArrayList<Node>();
for (Node node : nodes) {
if (node instanceof EndNode || node instanceof FaultNode) {
endNodes.add(node);
}
}
return endNodes;
}
public StartNode getStart(String trigger) {
Node[] nodes = getNodes();
for (int i = 0; i < nodes.length; i++) {
if (nodes[i] instanceof StartNode) {
StartNode start = ((StartNode) nodes[i]);
// return start node that is not event based node
if (trigger == null && ((start.getTriggers() == null
|| start.getTriggers().isEmpty())
&& start.getTimer() == null)) {
return start;
} else {
if (start.getTriggers() != null) {
for (Trigger t : start.getTriggers()) {
if (t instanceof EventTrigger) {
for (EventFilter filter : ((EventTrigger) t).getEventFilters()) {
if (filter.acceptsEvent(trigger, null)) {
return start;
}
}
} else if (t instanceof ConstraintTrigger && "conditional".equals(trigger)) {
return start;
}
}
} else if (start.getTimer() != null) {
if ("timer".equals(trigger)) {
return start;
}
}
}
}
}
return null;
}
public List<StartNode> getTimerStart() {
Node[] nodes = getNodes();
List<StartNode> timerStartNodes = new ArrayList<StartNode>();
for (int i = 0; i < nodes.length; i++) {
if (nodes[i] instanceof StartNode) {
// return start node that is not event based node
if (((StartNode) nodes[i]).getTimer() != null) {
timerStartNodes.add((StartNode) nodes[i]);
}
}
}
return timerStartNodes;
}
public List<Node> getAutoStartNodes() {
if (!isDynamic()) {
return Collections.emptyList();
}
List<Node> nodes = Arrays.stream(getNodes())
.filter(n -> n.getIncomingConnections().isEmpty() && "true".equalsIgnoreCase((String)n.getMetaData().get("customAutoStart")))
.collect(Collectors.toList());
return nodes;
}
private class WorkflowProcessNodeContainer extends NodeContainerImpl {
private static final long serialVersionUID = 510l;
protected void validateAddNode(Node node) {
super.validateAddNode(node);
StartNode startNode = getStart(null);
if ((node instanceof StartNode) && (startNode != null && startNode.getTriggers() == null && startNode.getTimer() == null)) {
// ignore start nodes that are event based
if ((((StartNode) node).getTriggers() == null || ((StartNode) node).getTriggers().isEmpty()) && ((StartNode) node).getTimer() == null) {
throw new IllegalArgumentException(
"A RuleFlowProcess cannot have more than one start node!");
}
}
}
}
}