Examples of org.jbpm.workflow.core.Constraint

org.jbpm.workflow.core.Constraint
Represents a constraint in a RuleFlow. Can be used to specify conditions in (X)OR-splits. @author Kris Verlaenen

        split.setMetaData("y", 2);
        split.setMetaData("width", 3);
        split.setMetaData("height", 4);
        split.setType(Split.TYPE_XOR);
        Connection connection = new ConnectionImpl(split, Node.CONNECTION_DEFAULT_TYPE, actionNode, Node.CONNECTION_DEFAULT_TYPE);
        Constraint constraint = new ConstraintImpl();
        constraint.setName("constraint1 ><&&");
        constraint.setPriority(1);
        constraint.setDialect("dialect1");
        constraint.setType("type1");
        constraint.setConstraint("constraint-text1");
        split.setConstraint(connection, constraint);
        connection = new ConnectionImpl(split, Node.CONNECTION_DEFAULT_TYPE, ruleSetNode, Node.CONNECTION_DEFAULT_TYPE);
        constraint = new ConstraintImpl();
        constraint.setName("constraint2");
        constraint.setPriority(2);
        constraint.setDialect("dialect2");
        constraint.setType("type2");
        constraint.setConstraint("constraint-text2");
        split.setConstraint(connection, constraint);
        process.addNode(split);
        new ConnectionImpl(startNode, Node.CONNECTION_DEFAULT_TYPE, split, Node.CONNECTION_DEFAULT_TYPE);
        
        EventNode eventNode = new EventNode();
        eventNode.setName("action");
        eventNode.setMetaData("x", 1);
        eventNode.setMetaData("y", 2);
        eventNode.setMetaData("width", 3);
        eventNode.setMetaData("height", 4);
        eventNode.setVariableName("eventVariable");
        EventTypeFilter eventFilter = new EventTypeFilter();
        eventFilter.setType("eventType");
        eventNode.addEventFilter(eventFilter);
        process.addNode(eventNode);
        
        Join join = new Join();
        join.setName("join");
        join.setMetaData("x", 1);
        join.setMetaData("y", 2);
        join.setMetaData("width", 3);
        join.setMetaData("height", 4);
        join.setType(Join.TYPE_N_OF_M);
        join.setN("#{var1}");
        process.addNode(join);
        new ConnectionImpl(actionNode, Node.CONNECTION_DEFAULT_TYPE, join, Node.CONNECTION_DEFAULT_TYPE);
        new ConnectionImpl(ruleSetNode, Node.CONNECTION_DEFAULT_TYPE, join, Node.CONNECTION_DEFAULT_TYPE);
        new ConnectionImpl(eventNode, Node.CONNECTION_DEFAULT_TYPE, join, Node.CONNECTION_DEFAULT_TYPE);
        
        MilestoneNode milestone = new MilestoneNode();
        milestone.setName("milestone");
        milestone.setMetaData("x", 1);
        milestone.setMetaData("y", 2);
        milestone.setMetaData("width", 3);
        milestone.setMetaData("height", 4);
        milestone.setConstraint("constraint");
        timer = new Timer();
        timer.setDelay("100");
        timer.setPeriod("100");
        action = new DroolsConsequenceAction("dialect", "consequence");
        milestone.addTimer(timer, action);
        timer = new Timer();
        timer.setDelay("200");
        timer.setPeriod("200");
        action = new DroolsConsequenceAction("dialect", "consequence");
        milestone.addTimer(timer, action);
        List<DroolsAction> actions = new ArrayList<DroolsAction>();
        DroolsAction action1 = new DroolsConsequenceAction("java", "System.out.println(\"action1\");");
        actions.add(action1);
        DroolsAction action2 = new DroolsConsequenceAction("java", "System.out.println(\"action2\");");
        actions.add(action2);
        milestone.setActions(ExtendedNodeImpl.EVENT_NODE_ENTER, actions);
        milestone.setActions(ExtendedNodeImpl.EVENT_NODE_EXIT, actions);
        process.addNode(milestone);
        connection = new ConnectionImpl(join, Node.CONNECTION_DEFAULT_TYPE, milestone, Node.CONNECTION_DEFAULT_TYPE);
        connection.setMetaData("bendpoints", "[10,10;20,20]");
        
        SubProcessNode subProcess = new SubProcessNode();
        subProcess.setName("subProcess");
        subProcess.setMetaData("x", 1);
        subProcess.setMetaData("y", 2);
        subProcess.setMetaData("width", 3);
        subProcess.setMetaData("height", 4);
        subProcess.setProcessId("processId");
        subProcess.setWaitForCompletion(false);
        subProcess.setIndependent(false);
        subProcess.addInMapping("subvar1", "var1");
        subProcess.addOutMapping("subvar2", "var2");
        timer = new Timer();
        timer.setDelay("100");
        timer.setPeriod("100");
        action = new DroolsConsequenceAction("dialect", "consequence");
        subProcess.addTimer(timer, action);
        timer = new Timer();
        timer.setDelay("200");
        timer.setPeriod("200");
        action = new DroolsConsequenceAction("dialect", "consequence");
        subProcess.addTimer(timer, action);
        subProcess.setActions(ExtendedNodeImpl.EVENT_NODE_ENTER, actions);
        subProcess.setActions(ExtendedNodeImpl.EVENT_NODE_EXIT, actions);
        process.addNode(subProcess);
        connection = new ConnectionImpl(milestone, Node.CONNECTION_DEFAULT_TYPE, subProcess, Node.CONNECTION_DEFAULT_TYPE);
        connection.setMetaData("bendpoints", "[10,10]");


        WorkItemNode workItemNode = new WorkItemNode();
        workItemNode.setName("WorkItem");
        Work work = new WorkImpl();
        work.setName("workname");
        Set<ParameterDefinition> parameterDefinitions = new HashSet<ParameterDefinition>();
        ParameterDefinition parameterDefinition = new ParameterDefinitionImpl("param1", new StringDataType());
        parameterDefinitions.add(parameterDefinition);
        parameterDefinition = new ParameterDefinitionImpl("param2", new IntegerDataType());
        parameterDefinitions.add(parameterDefinition);
        work.setParameterDefinitions(parameterDefinitions);
        work.setParameter("param1", "value1");
        work.setParameter("param2", 1);
        workItemNode.setWork(work);
        workItemNode.setWaitForCompletion(false);
        workItemNode.addInMapping("param1", "var1");
        workItemNode.addOutMapping("param2", "var2");
        timer = new Timer();
        timer.setDelay("100");
        timer.setPeriod("100");
        action = new DroolsConsequenceAction("dialect", "consequence");
        workItemNode.addTimer(timer, action);
        timer = new Timer();
        timer.setDelay("200");
        timer.setPeriod("200");
        action = new DroolsConsequenceAction("dialect", "consequence");
        workItemNode.addTimer(timer, action);
        workItemNode.setActions(ExtendedNodeImpl.EVENT_NODE_ENTER, actions);
        workItemNode.setActions(ExtendedNodeImpl.EVENT_NODE_EXIT, actions);
        process.addNode(workItemNode);
        connection = new ConnectionImpl(subProcess, Node.CONNECTION_DEFAULT_TYPE, workItemNode, Node.CONNECTION_DEFAULT_TYPE);
        connection.setMetaData("bendpoints", "[]");
        
        HumanTaskNode humanTaskNode = new HumanTaskNode();
        humanTaskNode.setName("Human Task");
        work = humanTaskNode.getWork();
        parameterDefinitions = new HashSet<ParameterDefinition>();
        parameterDefinition = new ParameterDefinitionImpl("TaskName", new StringDataType());
        parameterDefinitions.add(parameterDefinition);
        parameterDefinition = new ParameterDefinitionImpl("ActorId", new StringDataType());
        parameterDefinitions.add(parameterDefinition);
        parameterDefinition = new ParameterDefinitionImpl("Priority", new StringDataType());
        parameterDefinitions.add(parameterDefinition);
        parameterDefinition = new ParameterDefinitionImpl("Comment", new StringDataType());
        parameterDefinitions.add(parameterDefinition);
        work.setParameterDefinitions(parameterDefinitions);
        work.setParameter("TaskName", "Do something");
        work.setParameter("ActorId", "John Doe");
        humanTaskNode.setWaitForCompletion(false);
        humanTaskNode.setActions(ExtendedNodeImpl.EVENT_NODE_ENTER, actions);
        humanTaskNode.setActions(ExtendedNodeImpl.EVENT_NODE_EXIT, actions);
        process.addNode(humanTaskNode);
        connection = new ConnectionImpl(workItemNode, Node.CONNECTION_DEFAULT_TYPE, humanTaskNode, Node.CONNECTION_DEFAULT_TYPE);
        
        TimerNode timerNode = new TimerNode();
        timerNode.setName("timer");
        timerNode.setMetaData("x", 1);
        timerNode.setMetaData("y", 2);
        timerNode.setMetaData("width", 3);
        timerNode.setMetaData("height", 4);
        timer = new Timer();
        timer.setDelay("1000");
        timer.setPeriod("1000");
        timerNode.setTimer(timer);
        process.addNode(timerNode);
        new ConnectionImpl(humanTaskNode, Node.CONNECTION_DEFAULT_TYPE, timerNode, Node.CONNECTION_DEFAULT_TYPE);
        
        ForEachNode forEachNode = new ForEachNode();
        forEachNode.setName("ForEach");
        forEachNode.setCollectionExpression("collection");
        forEachNode.setVariable("variableName", new ObjectDataType());
        forEachNode.setWaitForCompletion(false);
        ActionNode subActionNode1 = new ActionNode();
        forEachNode.getCompositeNode().addNode(subActionNode1);
        ActionNode subActionNode2 = new ActionNode();
        forEachNode.getCompositeNode().addNode(subActionNode2);
        new ConnectionImpl(subActionNode1, Node.CONNECTION_DEFAULT_TYPE, subActionNode2, Node.CONNECTION_DEFAULT_TYPE);
        forEachNode.getCompositeNode().linkIncomingConnections(Node.CONNECTION_DEFAULT_TYPE, subActionNode1.getId(), Node.CONNECTION_DEFAULT_TYPE);
        forEachNode.getCompositeNode().linkOutgoingConnections(subActionNode2.getId(), Node.CONNECTION_DEFAULT_TYPE, Node.CONNECTION_DEFAULT_TYPE);
        process.addNode(forEachNode);
        new ConnectionImpl(timerNode, Node.CONNECTION_DEFAULT_TYPE, forEachNode, Node.CONNECTION_DEFAULT_TYPE);
        
        CompositeContextNode compositeNode = new CompositeContextNode();
        compositeNode.setName("Composite");
        VariableScope variableScope = new VariableScope();
        compositeNode.addContext(variableScope);
        compositeNode.setDefaultContext(variableScope);
        variableScope.setVariables(variables);
        ExceptionScope exceptionScope = new ExceptionScope();
        compositeNode.addContext(exceptionScope);
        compositeNode.setDefaultContext(exceptionScope);
        exceptionHandler = new ActionExceptionHandler();
        exceptionHandler.setFaultVariable("faultVariable");
        action = new DroolsConsequenceAction("dialect", "consequence");
        exceptionHandler.setAction(action);
        exceptionScope.setExceptionHandler("MyFault", exceptionHandler);
        exceptionHandler = new ActionExceptionHandler();
        exceptionHandler.setFaultVariable("faultVariable2");
        action = new DroolsConsequenceAction("dialect2", "consequence2");
        exceptionHandler.setAction(action);
        exceptionScope.setExceptionHandler("MyFault2", exceptionHandler);
        subActionNode1 = new ActionNode();
        compositeNode.addNode(subActionNode1);
        subActionNode2 = new ActionNode();
        compositeNode.addNode(subActionNode2);
        new ConnectionImpl(subActionNode1, Node.CONNECTION_DEFAULT_TYPE, subActionNode2, Node.CONNECTION_DEFAULT_TYPE);
        compositeNode.linkIncomingConnections(Node.CONNECTION_DEFAULT_TYPE, subActionNode1.getId(), Node.CONNECTION_DEFAULT_TYPE);
        compositeNode.linkOutgoingConnections(subActionNode2.getId(), Node.CONNECTION_DEFAULT_TYPE, Node.CONNECTION_DEFAULT_TYPE);
        process.addNode(compositeNode);
        new ConnectionImpl(forEachNode, Node.CONNECTION_DEFAULT_TYPE, compositeNode, Node.CONNECTION_DEFAULT_TYPE);
        
        EndNode endNode = new EndNode();
        endNode.setName("end");
        endNode.setTerminate(false);
        endNode.setMetaData("x", 1);
        endNode.setMetaData("y", 2);
        endNode.setMetaData("width", 3);
        endNode.setMetaData("height", 4);
        process.addNode(endNode);
        
        StateNode stateNode = new StateNode();
        stateNode.setName("state");
        stateNode.setMetaData("x", 1);
        stateNode.setMetaData("y", 2);
        stateNode.setMetaData("width", 3);
        stateNode.setMetaData("height", 4);
        timer = new Timer();
        timer.setDelay("100");
        timer.setPeriod("100");
        action = new DroolsConsequenceAction("dialect", "consequence");
        stateNode.addTimer(timer, action);
        timer = new Timer();
        timer.setDelay("200");
        timer.setPeriod("200");
        action = new DroolsConsequenceAction("dialect", "consequence");
        stateNode.addTimer(timer, action);
        actions = new ArrayList<DroolsAction>();
        action1 = new DroolsConsequenceAction("java", "System.out.println(\"action1\");");
        actions.add(action1);
        action2 = new DroolsConsequenceAction("java", "System.out.println(\"action2\");");
        actions.add(action2);
        stateNode.setActions(ExtendedNodeImpl.EVENT_NODE_ENTER, actions);
        stateNode.setActions(ExtendedNodeImpl.EVENT_NODE_EXIT, actions);
        new ConnectionImpl(compositeNode, Node.CONNECTION_DEFAULT_TYPE, stateNode, Node.CONNECTION_DEFAULT_TYPE);
        connection = new ConnectionImpl(stateNode, Node.CONNECTION_DEFAULT_TYPE, join, Node.CONNECTION_DEFAULT_TYPE);
        constraint = new ConstraintImpl();
        constraint.setName("constraint1 ><&&");
        constraint.setPriority(1);
        constraint.setDialect("dialect1");
        constraint.setType("type1");
        constraint.setConstraint("constraint-text1 %&<>");
        stateNode.setConstraint(connection, constraint);
        connection = new ConnectionImpl(stateNode, Node.CONNECTION_DEFAULT_TYPE, endNode, Node.CONNECTION_DEFAULT_TYPE);
        constraint = new ConstraintImpl();
        constraint.setName("constraint2");
        constraint.setPriority(2);
        constraint.setDialect("dialect2");
        constraint.setType("type2");
        constraint.setConstraint("constraint-text2");
        stateNode.setConstraint(connection, constraint);
        process.addNode(stateNode);
        
        String xml = XmlRuleFlowProcessDumper.INSTANCE.dump(process, true);
        if (xml == null) {

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        writeTimers(stateNode.getTimers(), xmlDump);
        if (!stateNode.getConstraints().isEmpty()) {
          xmlDump.append("      <constraints>" + EOL);
          for (Map.Entry<ConnectionRef, Constraint> entry: stateNode.getConstraints().entrySet()) {
              ConnectionRef connection = entry.getKey();
              Constraint constraint = entry.getValue();
              xmlDump.append("        <constraint "
                  + "toNodeId=\"" + connection.getNodeId() + "\" ");
              String name = constraint.getName();
              if (name != null && !"".equals(name)) {
                  xmlDump.append("name=\"" + XmlDumper.replaceIllegalChars(constraint.getName()) + "\" ");
              }
              int priority = constraint.getPriority();
              if (priority != 0) {
                  xmlDump.append("priority=\"" + constraint.getPriority() + "\" ");
              }
              String constraintString = constraint.getConstraint();
              if (constraintString != null) {
                  xmlDump.append(">" + XmlDumper.replaceIllegalChars(constraintString) + "</constraint>" + EOL);
              } else {
                  xmlDump.append("/>" + EOL);
              }

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              writeMetaData(splitNode, xmlDump);
            }
            xmlDump.append("      <constraints>" + EOL);
            for (Map.Entry<ConnectionRef, Constraint> entry: splitNode.getConstraints().entrySet()) {
                ConnectionRef connection = entry.getKey();
                Constraint constraint = entry.getValue();
                xmlDump.append("        <constraint "
                    + "toNodeId=\"" + connection.getNodeId() + "\" "
                    + "toType=\"" + connection.getToType() + "\" ");
                String name = constraint.getName();
                if (name != null && !"".equals(name)) {
                    xmlDump.append("name=\"" + XmlDumper.replaceIllegalChars(constraint.getName()) + "\" ");
                }
                int priority = constraint.getPriority();
                if (priority != 0) {
                    xmlDump.append("priority=\"" + constraint.getPriority() + "\" ");
                }
                xmlDump.append("type=\"" + constraint.getType() + "\" ");
                String dialect = constraint.getDialect();
                if (dialect != null && !"".equals(dialect)) {
                    xmlDump.append("dialect=\"" + dialect + "\" ");
                }
                String constraintString = constraint.getConstraint();
                if (constraintString != null) {
                    xmlDump.append(">" + XmlDumper.replaceIllegalChars(constraintString) + "</constraint>" + EOL);
                } else {
                    xmlDump.append("/>" + EOL);
                }

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                      final String localName,
                      final ExtensibleXmlParser parser) throws SAXException {
        final Element element = parser.endElementBuilder();
          
      Constrainable parent = (Constrainable) parser.getParent();
        Constraint constraint = new ConstraintImpl();


        final String toNodeIdString = element.getAttribute("toNodeId");
        String toType = element.getAttribute("toType");
        ConnectionRef connectionRef = null;
        if (toNodeIdString != null && toNodeIdString.trim().length() > 0) {
          int toNodeId = new Integer(toNodeIdString);
          if (toType == null || toType.trim().length() == 0) {
            toType = NodeImpl.CONNECTION_DEFAULT_TYPE;
          }
          connectionRef = new ConnectionRef(toNodeId, toType);
        }


        final String name = element.getAttribute("name");
        constraint.setName(name);
        final String priority = element.getAttribute("priority");
        if (priority != null && priority.length() != 0) {
            constraint.setPriority(new Integer(priority));
        }


        final String type = element.getAttribute("type");
        constraint.setType(type);
        final String dialect = element.getAttribute("dialect");
        constraint.setDialect(dialect);
          
        String text = ((Text)element.getChildNodes().item( 0 )).getWholeText();
        if (text != null) {
            text = text.trim();
            if ("".equals(text)) {
                text = null;
            }
        }
        constraint.setConstraint(text);
        parent.addConstraint(connectionRef, constraint);
        return null;
    }

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          target, NodeImpl.CONNECTION_DEFAULT_TYPE);
        result.setMetaData("bendpoints", connection.getBendpoints());
        result.setMetaData("UniqueId", connection.getId());
        if (source instanceof Split) {
          Split split = (Split) source;
          Constraint constraint = new ConstraintImpl();
          String defaultConnection = (String) split.getMetaData("Default");
          if (defaultConnection != null && defaultConnection.equals(connection.getId())) {
            constraint.setDefault(true);
          }
          if (connection.getName() != null) {
            constraint.setName(connection.getName());
          } else {
            constraint.setName("");
          }
          if (connection.getType() != null) {
            constraint.setType(connection.getType());
          } else {
            constraint.setType("code");
          }
          if (connection.getLanguage() != null) {
            constraint.setDialect(connection.getLanguage());
          }
          if (connection.getExpression() != null) {
            constraint.setConstraint(connection.getExpression());
          }
          constraint.setPriority(connection.getPriority());
          split.addConstraint(
            new ConnectionRef(target.getId(), NodeImpl.CONNECTION_DEFAULT_TYPE),
            constraint);
        }
      }

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    private void postProcessNodes(NodeContainer container) {
        for (Node node: container.getNodes()) {
            if (node instanceof StateNode) {
                StateNode stateNode = (StateNode) node;
                String condition = (String) stateNode.getMetaData("Condition");
                Constraint constraint = new ConstraintImpl();
                constraint.setConstraint(condition);
                constraint.setType("rule");
                for (org.drools.definition.process.Connection connection: stateNode.getDefaultOutgoingConnections()) {
                    stateNode.setConstraint(connection, constraint);
                }
            } else if (node instanceof NodeContainer) {
                postProcessNodes((NodeContainer) node);

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        for ( int i = 0; i < nodes.length; i++ ) {
            if ( nodes[i] instanceof Split ) {
                Split split = (Split) nodes[i];
                if ( split.getType() == Split.TYPE_XOR || split.getType() == Split.TYPE_OR ) {
                    for ( Connection connection : split.getDefaultOutgoingConnections() ) {
                        Constraint constraint = split.getConstraint( connection );
                        if ( "rule".equals( constraint.getType() ) ) {
                            builder.append( createSplitRule( process,
                                                             connection,
                                                             split.getConstraint( connection ).getConstraint() ) );
                        }
                    }

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            }
        }
        if (connection.getFrom() instanceof Split) {
          Split split = (Split) connection.getFrom();
          if (split.getType() == Split.TYPE_XOR || split.getType() == Split.TYPE_OR) {
            Constraint constraint = split.getConstraint(connection);
            if (constraint == null) {
                xmlDump.append(">" + EOL +
              "      <conditionExpression xsi:type=\"tFormalExpression\" />");
            } else {
                    if (constraint.getName() != null && constraint.getName().trim().length() > 0) {
                  xmlDump.append("name=\"" + XmlBPMNProcessDumper.replaceIllegalCharsAttribute(constraint.getName()) + "\" ");
                }
                    if (constraint.getPriority() != 0) {
                      xmlDump.append("tns:priority=\"" + constraint.getPriority() + "\" ");
                    }
                xmlDump.append(">" + EOL +
            "      <conditionExpression xsi:type=\"tFormalExpression\" ");
                    if ("code".equals(constraint.getType())) {
                        if (JavaDialect.ID.equals(constraint.getDialect())) {
                            xmlDump.append("language=\"" + JAVA_LANGUAGE + "\" ");
                        } else if ("XPath".equals(constraint.getDialect())) {
                            xmlDump.append("language=\"" + XPATH_LANGUAGE + "\" ");
                        }
                    } else {
                        xmlDump.append("language=\"" + RULE_LANGUAGE + "\" ");
                    }
                    String constraintString = constraint.getConstraint();
                    if (constraintString == null) {
                        constraintString = "";
                    }
                    xmlDump.append(">" + XmlDumper.replaceIllegalChars(constraintString) + "</conditionExpression>");
            }

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        // TODO: composite states trigger
        StateNode stateNode = getStateNode();
        Connection selected = null;
        int priority = Integer.MAX_VALUE;
        for (Connection connection: stateNode.getOutgoingConnections(NodeImpl.CONNECTION_DEFAULT_TYPE)) {
            Constraint constraint = stateNode.getConstraint(connection);
            if (constraint != null && constraint.getPriority() < priority) {
              String rule = "RuleFlowStateNode-" + getProcessInstance().getProcessId() + "-" + 
                getStateNode().getUniqueId() + "-" + 
                connection.getTo().getId() + "-" + 
                connection.getToType();
            boolean isActive = ((InternalAgenda) getProcessInstance().getKnowledgeRuntime().getAgenda())
                .isRuleActiveInRuleFlowGroup("DROOLS_SYSTEM", rule, getProcessInstance().getId());
            if (isActive) {
                selected = connection;
                  priority = constraint.getPriority();
              }
            }
        }
        if (selected != null) {
            ((NodeInstanceContainer) getNodeInstanceContainer()).removeNodeInstance(this);

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  public void signalEvent(String type, Object event) {
    if ("signal".equals(type)) {
      if (event instanceof String) {
        for (Connection connection: getStateNode().getOutgoingConnections(NodeImpl.CONNECTION_DEFAULT_TYPE)) {
          boolean selected = false;
          Constraint constraint = getStateNode().getConstraint(connection);
          if (constraint == null) {
            if (((String) event).equals(connection.getTo().getName())) {
              selected = true;
            }
          } else if (((String) event).equals(constraint.getName())) {
            selected = true;
          }
          if (selected) {
            triggerEvent(ExtendedNodeImpl.EVENT_NODE_EXIT);
            removeEventListeners();

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