Expression based hierarchical mechanism for HTML form data validation
Expression-based hierarchical validation is disclosed, including: receiving an indication to configure validation for an application page element; in response to the indication, causing to be displayed a validation configuration user interface to receive validation configuration for the application page element; receiving validation configuration for the application page element that includes a validation expression provided via the validation configuration user interface; and generating, based at least in part on the validation expression, code to be executed at a runtime to validate runtime data associated with an instance of the page element.
1. A system, comprising:
a processor; and
a memory coupled with the processor, wherein the memory is configured to provide the processor with instructions which when executed cause the processor to:
receive, during an application design time, an indication to configure validation for an application page element;
in response to the indication, cause to be displayed a validation configuration user interface to receive validation configuration for the application page element;
receive, via the displayed validation configuration user interface, user input defining a validation expression that specifies a validation condition on the application page element;
receive, during the application design time, an indication to group the application page element, along with at least one other application page element, into a parent container;
receive validation configuration for the parent container, wherein the validation configuration includes a validation expression that specifies a validation condition on the parent container, and wherein the validation condition is based at least in part on a combination of validation statuses of the individual application page elements grouped into the parent container; and
generate, based at least in part on the validation expressions associated with the application page element and the parent container, code to be executed at a runtime to:
validate runtime data associated with an instance of the application page element; and
validate the parent container according to the validation statuses of the individual application page elements included in the parent container.
2. The system of claim 1 , wherein the received validation configuration for the application page element further includes a specification of an error message to be displayed.
3. The system of claim 1 , wherein the received validation configuration for the application page element further includes an indication of an event upon which validation is to be performed.
4. The system of claim 1 , wherein the parent container includes a fragment of a container.
5. The system of claim 1 , wherein the memory is further configured to provide the processor with instructions which when executed cause the processor to generate code to be executed at the runtime to propagate a validation status of the application page element to one or more parent nodes in a page hierarchy.
6. The system of claim 1 , wherein a behavior of an actionable element is configured to be bound at least in part to a validation status of the application page element.
7. The system of claim 1 , wherein a behavior of an actionable element is configured to be bound at least in part to a validation status of the parent container including the application page element.
8. A method, comprising:
receiving, via an interface and during an application design time, an indication to configure validation for an application page element;
in response to the indication, causing to be displayed a validation configuration user interface to receive validation configuration for the application page element;
receiving, via the displayed validation configuration user interface, user input defining a validation expression that specifies a validation condition on the application page element; and
receiving, during the application design time, an indication to group the application page element, along with at least one other application page element, into a parent container;
receiving validation configuration for the parent container, wherein the validation configuration includes a validation expression that specifies a validation condition on the parent container, and wherein the validation condition is based at least in part on a combination of validation statuses of the individual application page elements grouped into the parent container; and
generating, based at least in part on the validation expressions associated with the application page element and the parent container, code to be executed at a runtime to:
validate runtime data associated with an instance of the application page element; and
validate the parent container according to the validation statuses of the individual application page elements included in the parent container.
9. The method of claim 8 , wherein the received validation configuration for the application page element further includes a specification of an error message to be displayed.
10. The method of claim 8 , wherein the received validation configuration for the application page element further includes an indication of an event upon which validation is to be performed.
11. The method of claim 8 , wherein the parent container includes a fragment of a container.
12. The method of claim 8 , further comprising generating code to be executed at the runtime to propagate a validation status of the application page element to one or more parent nodes in a page hierarchy.
13. The method of claim 8 , wherein a behavior of an actionable element is configured to be bound at least in part to at least one of a validation status of the application page element and a validation status of the parent container.
14. A computer program product, the computer program product being embodied in a non-transitory tangible computer readable storage medium and comprising computer instructions for:
receiving, via an interface and during an application design time, an indication to configure validation for an application page element;
in response to the indication, causing to be displayed a validation configuration user interface to receive validation configuration for the application page element;
receiving, via the displayed validation configuration user interface, user input defining a validation expression that specifies a validation condition on the application page element; and
receiving, during the application design time, an indication to group the application page element, along with at least one other application page element, into a parent container;
receiving validation configuration for the parent container, wherein the validation configuration includes a validation expression that specifies a validation condition on the parent container, and wherein the validation condition is based at least in part on a combination of validation statuses of the individual application page elements grouped into the parent container; and
generating, based at least in part on the validation expressions associated with the application page element and the parent container, code to be executed at a runtime to:
validate runtime data associated with an instance of the application page element; and
validate the parent container according to the validation statuses of the individual application page elements included in the parent container.