Examples of org.camunda.bpm.engine.impl.el.ExpressionManager

org.camunda.bpm.engine.impl.el.ExpressionManager

Central manager for all expressions.

Process parsers will use this to build expression objects that are stored in the process definitions.

Then also this class is used as an entry point for runtime evaluation of the expressions.
@author Tom Baeyens @author Dave Syer @author Frederik Heremans

  protected List<FormFieldHandler> formFieldHandlers = new ArrayList<FormFieldHandler>();


  public void parseConfiguration(Element activityElement, DeploymentEntity deployment, ProcessDefinitionEntity processDefinition, BpmnParse bpmnParse) {
    this.deploymentId = deployment.getId();


    ExpressionManager expressionManager = Context
        .getProcessEngineConfiguration()
        .getExpressionManager();


    Element extensionElement = activityElement.element("extensionElements");
    if (extensionElement != null) {

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  @Override
  public void parseConfiguration(Element activityElement, DeploymentEntity deployment, ProcessDefinitionEntity processDefinition, BpmnParse bpmnParse) {
    super.parseConfiguration(activityElement, deployment, processDefinition, bpmnParse);


    ExpressionManager expressionManager = Context
        .getProcessEngineConfiguration()
        .getExpressionManager();


    String formKeyAttribute = activityElement.attributeNS(BpmnParser.ACTIVITI_BPMN_EXTENSIONS_NS, "formKey");


    if (formKeyAttribute != null) {
      this.formKey = expressionManager.createExpression(formKeyAttribute);
    }


    if (formKey != null) {
      processDefinition.setStartFormKey(true);
    }

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    CmmnActivity activity = handler.handleElement(planItem, context);


    // then
    HumanTaskActivityBehavior behavior = (HumanTaskActivityBehavior) activity.getActivityBehavior();


    ExpressionManager expressionManager = behavior.getExpressionManager();
    assertNotNull(expressionManager);
    assertEquals(context.getExpressionManager(), expressionManager);
  }

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    String type = Expression.class.getName();


    Object value = getFixedValue(field);


    if (value == null) {
      ExpressionManager expressionManager = context.getExpressionManager();
      value = getExpressionValue(field, expressionManager);
    }


    return new FieldDeclaration(name, type, value);
  }

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    }
  }


  protected void initExpressionManager() {
    if (expressionManager==null) {
      expressionManager = new ExpressionManager(beans);
      // add function mapper for command context (eg currentUser(), currentUserGroups())
      expressionManager.addFunctionMapper(new CommandContextFunctionMapper());
      // add function mapper for date time (eg now(), dateTime())
      expressionManager.addFunctionMapper(new DateTimeFunctionMapper());
    }

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    if (conditions.size() > 1) {
      String id = sentryDeclaration.getId();
      LOGGER.info("The ifPart of Sentry with id '"+id+"' has more than one condition: only the first condition will be used, the other conditions will be ignored.");
    }


    ExpressionManager expressionManager = context.getExpressionManager();
    ConditionExpression condition = conditions.iterator().next();
    Expression conditionExpression = expressionManager.createExpression(condition.getBody());


    CmmnIfPartDeclaration ifPartDeclaration = new CmmnIfPartDeclaration();
    ifPartDeclaration.setCondition(conditionExpression);
    sentryDeclaration.setIfPart(ifPartDeclaration);
  }

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  protected void initializeRequiredRule(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
    PlanItemControl itemControl = getItemControl(element);
    PlanItemControl defaultControl = getDefaultControl(element);


    ExpressionManager expressionManager = context.getExpressionManager();


    RequiredRule requiredRule = null;
    if (itemControl != null) {
      requiredRule = itemControl.getRequiredRule();
    }
    if (requiredRule == null && defaultControl != null) {
      requiredRule = defaultControl.getRequiredRule();
    }


    if (requiredRule != null) {
      String rule = requiredRule.getCondition().getBody();
      Expression requiredRuleExpression = expressionManager.createExpression(rule);
      CaseControlRule caseRule = new CaseControlRuleImpl(requiredRuleExpression);
      activity.setProperty(PROPERTY_REQUIRED_RULE, caseRule);
    }


  }

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  protected void initializeManualActivationRule(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
    PlanItemControl itemControl = getItemControl(element);
    PlanItemControl defaultControl = getDefaultControl(element);


    ExpressionManager expressionManager = context.getExpressionManager();


    ManualActivationRule manualActivationRule = null;
    if (itemControl != null) {
      manualActivationRule = itemControl.getManualActivationRule();
    }
    if (manualActivationRule == null && defaultControl != null) {
      manualActivationRule = defaultControl.getManualActivationRule();
    }


    if (manualActivationRule != null) {
      String rule = manualActivationRule.getCondition().getBody();
      Expression manualActivationExpression = expressionManager.createExpression(rule);
      CaseControlRule caseRule = new CaseControlRuleImpl(manualActivationExpression);
      activity.setProperty(PROPERTY_MANUAL_ACTIVATION_RULE, caseRule);
    }


  }

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  protected void initializeRepetitionRule(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
    PlanItemControl itemControl = getItemControl(element);
    PlanItemControl defaultControl = getDefaultControl(element);


    ExpressionManager expressionManager = context.getExpressionManager();


    RepetitionRule repetitionRule = null;
    if (itemControl != null) {
      repetitionRule = itemControl.getRepetitionRule();
    }
    if (repetitionRule == null && defaultControl != null) {
      repetitionRule = defaultControl.getRepetitionRule();
    }


    if (repetitionRule != null) {
      String rule = repetitionRule.getCondition().getBody();
      Expression repetitionRuleExpression = expressionManager.createExpression(rule);
      CaseControlRule caseRule = new CaseControlRuleImpl(repetitionRuleExpression);
      activity.setProperty(PROPERTY_REPETITION_RULE, caseRule);
    }


  }

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  protected CaseExecutionListener initializeCaseExecutionListener(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context, CamundaCaseExecutionListener listener) {
    Collection<CamundaField> fields = listener.getCamundaFields();
    List<FieldDeclaration> fieldDeclarations = initializeFieldDeclarations(element, activity, context, fields);


    ExpressionManager expressionManager = context.getExpressionManager();


    CaseExecutionListener caseExecutionListener = null;


    String className = listener.getCamundaClass();
    String expression = listener.getCamundaExpression();
    String delegateExpression = listener.getCamundaDelegateExpression();
    CamundaScript scriptElement = listener.getCamundaScript();


    if (className != null) {
      caseExecutionListener = new ClassDelegateCaseExecutionListener(className, fieldDeclarations);


    } else if (expression != null) {
      Expression expressionExp = expressionManager.createExpression(expression);
      caseExecutionListener = new ExpressionCaseExecutionListener(expressionExp);


    } else if (delegateExpression != null) {
      Expression delegateExp = expressionManager.createExpression(delegateExpression);
      caseExecutionListener = new DelegateExpressionCaseExecutionListener(delegateExp, fieldDeclarations);


    } else if (scriptElement != null) {
      ExecutableScript executableScript = initializeScript(element, activity, context, scriptElement);
      if (executableScript != null) {

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org.camunda.bpm.engine.impl.cfg.ProcessEngineConfigurationImpl

org.camunda.bpm.engine.impl.cmmn.handler.HumanTaskItemHandler

org.camunda.bpm.engine.impl.cmmn.handler.ItemHandler

org.camunda.bpm.engine.impl.cmmn.handler.ProcessOrCaseTaskItemHandler

org.camunda.bpm.engine.impl.cmmn.handler.SentryHandler

org.camunda.bpm.engine.impl.core.variable.scope.AbstractVariableScope

org.camunda.bpm.engine.impl.form.handler.DefaultFormHandler

org.camunda.bpm.engine.impl.form.handler.DefaultStartFormHandler

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org.camunda.bpm.engine.impl.javax.el.BeanELResolver

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