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

    // outputs
    initializeOutputParameter(element, activity, context);
  }


  protected void initializeDefinitionKey(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context, CallableElement callableElement) {
    ExpressionManager expressionManager = context.getExpressionManager();
    String definitionKey = getDefinitionKey(element, activity, context);
    ParameterValueProvider definitionKeyProvider = createParameterValueProvider(definitionKey, expressionManager);
    callableElement.setDefinitionKeyValueProvider(definitionKeyProvider);
  }

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      callableElement.setBinding(CallableElementBinding.VERSION);
    }
  }


  protected void initializeVersion(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context, CallableElement callableElement) {
    ExpressionManager expressionManager = context.getExpressionManager();
    String version = getVersion(element, activity, context);
    ParameterValueProvider versionProvider = createParameterValueProvider(version, expressionManager);
    callableElement.setVersionValueProvider(versionProvider);
  }

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  protected void initializeInputParameter(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
    ProcessOrCaseTaskActivityBehavior behavior = (ProcessOrCaseTaskActivityBehavior) activity.getActivityBehavior();
    CallableElement callableElement = behavior.getCallableElement();


    ExpressionManager expressionManager = context.getExpressionManager();


    List<CamundaIn> inputs = getInputs(element);


    for (CamundaIn input : inputs) {

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  protected void initializeOutputParameter(CmmnElement element, CmmnActivity activity, CmmnHandlerContext context) {
    ProcessOrCaseTaskActivityBehavior behavior = (ProcessOrCaseTaskActivityBehavior) activity.getActivityBehavior();
    CallableElement callableElement = behavior.getCallableElement();


    ExpressionManager expressionManager = context.getExpressionManager();


    List<CamundaOut> outputs = getOutputs(element);


    for (CamundaOut output : outputs) {

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    CaseDefinitionEntity caseDefinition = new CaseDefinitionEntity();
    caseDefinition.setTaskDefinitions(new HashMap<String, TaskDefinition>());
    context.setCaseDefinition(caseDefinition);


    ExpressionManager expressionManager = new ExpressionManager();
    context.setExpressionManager(expressionManager);
  }

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


    ExpressionManager expressionManager = context.getExpressionManager();


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


    CaseVariableListener variableListener = null;
    if (className != null) {
      variableListener = new ClassDelegateCaseVariableListener(className, fieldDeclarations);


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


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


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

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