protected internal virtual void ParseValidation(Element formField, FormFieldHandler formFieldHandler,
BpmnParse bpmnParse, ExpressionManager expressionManager)
{
var validationElement = formField.ElementNs(BpmnParse.CamundaBpmnExtensionsNs, "validation");
if (validationElement != null)
{
var constraintElements = validationElement.ElementsNS(
BpmnParse.CamundaBpmnExtensionsNs.NamespaceUri, "constraint");
foreach (var property in constraintElements)
{
var validator = Context.ProcessEngineConfiguration.FormValidators.CreateValidator(property,
bpmnParse, expressionManager);
var validatorName = property.GetAttributeValue("name");
var validatorConfig = property.GetAttributeValue("config");
if (validator != null)
{
var handler = new FormFieldValidationConstraintHandler();
handler.Name = validatorName;
handler.Config = validatorConfig;
handler.Validator = validator;
formFieldHandler.ValidationHandlers.Add(handler);
}
}
}
}
public DefaultFormFieldValidatorContext(IVariableScope variableScope, string configuration,
IVariableMap submittedValues, FormFieldHandler formFieldHandler)
{
this.variableScope = variableScope;
this.configuration = configuration;
this.submittedValues = submittedValues;
this.formFieldHandler = formFieldHandler;
}
protected internal virtual void ParseFormField(Element formField, BpmnParse bpmnParse,
ExpressionManager expressionManager)
{
var formFieldHandler = new FormFieldHandler();
// parse Id
var id = formField.GetAttributeValue("id");
if (ReferenceEquals(id, null) || (id.Length == 0))
{
bpmnParse.AddError("attribute id must be set for FormFieldGroup and must have a non-empty value",
formField);
}
else
{
formFieldHandler.Id = id;
}
if (id.Equals(BusinessKeyFieldId))
{
formFieldHandler.BusinessKey = true;
}
// parse name
var name = formField.GetAttributeValue("label");
if (!ReferenceEquals(name, null))
{
IExpression nameExpression = (Bpm.Engine.Impl.EL.IExpression)expressionManager.CreateExpression(name);
formFieldHandler.Label = nameExpression;
}
// parse properties
ParseProperties(formField, formFieldHandler, bpmnParse, expressionManager);
// parse validation
ParseValidation(formField, formFieldHandler, bpmnParse, expressionManager);
// parse type
var formTypes = FormTypes;
var formType = formTypes.ParseFormPropertyType(formField, bpmnParse);
formFieldHandler.SetType(formType);
// parse default value
var defaultValue = formField.GetAttributeValue("defaultValue");
if (!ReferenceEquals(defaultValue, null))
{
IExpression defaultValueExpression = (Bpm.Engine.Impl.EL.IExpression)expressionManager.CreateExpression(defaultValue);
formFieldHandler.DefaultValueExpression = defaultValueExpression;
}
FormFieldHandlers.Add(formFieldHandler);
}
// submit /////////////////////////////////
public virtual void Validate(object submittedValue, IVariableMap submittedValues,
FormFieldHandler formFieldHandler, IVariableScope variableScope)
{
try
{
IFormFieldValidatorContext context = new DefaultFormFieldValidatorContext(variableScope, config,
submittedValues, formFieldHandler);
if (!validator.Validate(submittedValue, context))
{
throw new FormFieldValidatorException(formFieldHandler.Id, name, config, submittedValue,
"Invalid value submitted for form field '" + formFieldHandler.Id + "': validation of " + this +
" failed.");
}
}
catch (FormFieldValidationException e)
{
throw new FormFieldValidatorException(formFieldHandler.Id, name, config, submittedValue,
"Invalid value submitted for form field '" + formFieldHandler.Id + "': validation of " + this +
" failed.", e);
}
}
protected internal virtual void ParseProperties(Element formField, FormFieldHandler formFieldHandler,
BpmnParse bpmnParse, ExpressionManager expressionManager)
{
var propertiesElement = formField.ElementNs(BpmnParse.CamundaBpmnExtensionsNs, "properties");
if (propertiesElement != null)
{
var propertyElements = propertiesElement.ElementsNS(BpmnParse.CamundaBpmnExtensionsNs,
"property");
// use linked hash map to preserve item ordering as provided in XML
IDictionary <string, string> propertyMap = new Dictionary <string, string>();
foreach (var property in propertyElements)
{
var id = property.GetAttributeValue("id");
var value = property.GetAttributeValue("value");
propertyMap[id] = value;
}
formFieldHandler.Properties = propertyMap;
}
}
