InputOutputHelper.js
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'use strict';
var ModelUtil = require('bpmn-js/lib/util/ModelUtil'),
is = ModelUtil.is,
getBusinessObject = ModelUtil.getBusinessObject;
var extensionElementsHelper = require('./ExtensionElementsHelper'),
implementationTypeHelper = require('./ImplementationTypeHelper');
var InputOutputHelper = {};
module.exports = InputOutputHelper;
function getElements(bo, type, prop) {
var elems = extensionElementsHelper.getExtensionElements(bo, type) || [];
return !prop ? elems : (elems[0] || {})[prop] || [];
}
function getParameters(element, prop, insideConnector) {
var inputOutput = InputOutputHelper.getInputOutput(element, insideConnector);
return (inputOutput && inputOutput.get(prop)) || [];
}
/**
* Get a inputOutput from the business object
*
* @param {djs.model.Base} element
* @param {boolean} insideConnector
*
* @return {ModdleElement} the inputOutput object
*/
InputOutputHelper.getInputOutput = function(element, insideConnector) {
if (!insideConnector) {
var bo = getBusinessObject(element);
return (getElements(bo, 'activiti:InputOutput') || [])[0];
}
var connector = this.getConnector(element);
return connector && connector.get('inputOutput');
};
/**
* Get a connector from the business object
*
* @param {djs.model.Base} element
*
* @return {ModdleElement} the connector object
*/
InputOutputHelper.getConnector = function(element) {
var bo = implementationTypeHelper.getServiceTaskLikeBusinessObject(element);
return bo && (getElements(bo, 'activiti:Connector') || [])[0];
};
/**
* Return all input parameters existing in the business object, and
* an empty array if none exist.
*
* @param {djs.model.Base} element
* @param {boolean} insideConnector
*
* @return {Array} a list of input parameter objects
*/
InputOutputHelper.getInputParameters = function(element, insideConnector) {
return getParameters.apply(this, [ element, 'inputParameters', insideConnector ]);
};
/**
* Return all output parameters existing in the business object, and
* an empty array if none exist.
*
* @param {djs.model.Base} element
* @param {boolean} insideConnector
*
* @return {Array} a list of output parameter objects
*/
InputOutputHelper.getOutputParameters = function(element, insideConnector) {
return getParameters.apply(this, [ element, 'outputParameters', insideConnector ]);
};
/**
* Get a input parameter from the business object at given index
*
* @param {djs.model.Base} element
* @param {boolean} insideConnector
* @param {number} idx
*
* @return {ModdleElement} input parameter
*/
InputOutputHelper.getInputParameter = function(element, insideConnector, idx) {
return this.getInputParameters(element, insideConnector)[idx];
};
/**
* Get a output parameter from the business object at given index
*
* @param {djs.model.Base} element
* @param {boolean} insideConnector
* @param {number} idx
*
* @return {ModdleElement} output parameter
*/
InputOutputHelper.getOutputParameter = function(element, insideConnector, idx) {
return this.getOutputParameters(element, insideConnector)[idx];
};
/**
* Returns 'true' if the given element supports inputOutput
*
* @param {djs.model.Base} element
* @param {boolean} insideConnector
*
* @return {boolean} a boolean value
*/
InputOutputHelper.isInputOutputSupported = function(element, insideConnector) {
if (insideConnector) {
return true;
}
var bo = getBusinessObject(element);
return (
is(bo, 'bpmn:FlowNode') && !(
is(bo, 'bpmn:StartEvent') ||
is(bo, 'bpmn:Gateway') ||
is(bo, 'bpmn:BoundaryEvent') ||
(
is(bo, 'bpmn:SubProcess') && bo.get('triggeredByEvent')
)
)
);
};
/**
* Returns 'true' if the given element supports output parameters
*
* @param {djs.model.Base} element
* @param {boolean} insideConnector
*
* @return {boolean} a boolean value
*/
InputOutputHelper.areOutputParametersSupported = function(element, insideConnector) {
var bo = getBusinessObject(element);
return insideConnector || (!is(bo, 'bpmn:EndEvent') && !bo.loopCharacteristics);
};