Property form: General tab — Configuring validation
A property of mode
can use table validation to constrain an input value to match one of the specified values or a pattern of values. You define a table of data that describes what values are valid for this property.
To use table validation:
Select one of the values in the
drop-down list (other than the
Nonevalue). The appropriate fields for that type appear in the form.
- Complete the fields appropriate for the selected Table type value. These fields define the set (table) of acceptable values. See the following sections for details of the fields used for each type of table validation.
Although the value is compared with the table elements a case-insensitive way, the system corrects the case. For example, if the values recorded in a
on this tab are all lowercase, a user can enter at runtime the value in uppercase, mixed case, or lowercase letters. The system accepts a matching value but converts it to lowercase.
Field Value, Class Key Value, Remote List, or
Local List table validation
when your property value is permanently limited to a modest number of known values in a single language. (To accomplish a similar presentation with localized values, specify
If there are to be a large list of values that are expected to change frequently, rather than having to maintain a long list here, use the field value table validation method instead.
Typically when using this option, the Control field is set to either the PromptSelect or RadioButtons standard control, so that at runtime, a selection list displaying the specified acceptable values is presented to the user.
You cannot use a
Local Listis selected, a Table Values array appears. In this array, specify those values that are acceptable input for this property. Enter each value as a literal. Order is not significant.
is the simplest way to show a list to the user at runtime for the user to make a selection. Localization of the values is not supported for a
Local List. The value displayed at runtime is the value stored in the clipboard.
You need not leave a blank entry to allow the property value to be empty.
If you enter a value in the first row, it appears at runtime as the default value, and might be too easy for users to overlook. To encourage users to make a non-blank selection at runtime, leave the first entry blank. To require users to make an explicit choice, leave the first row entry and mark the corresponding field on a user form as required.
Field Value table validation
when the set of valid values:
- Contains more than a few hundred values or the values are expected to change frequently, and
- The values are available at runtime within the keys of field value rules
For this method, you specify only the first two key parts of the set of field value rules. At runtime, the system locates the actual literal values by using the specified two key parts to locate the field value rules that contain the values. If a match for the input value is not found among the field values, the validation fails and the system returns an error.
Typically when using this option, the Control field is set to PromptFieldValue, to present a user with a fixed list of selection values to select from at runtime.
|Field Value Description|
|Class||Select a class that is the first key part ( Applies To class) of one or more field value rules, where the third key part of the field value rule (the Field Value on the Field Value rule form) defines an acceptable input value for the property. (The class specified here need not match the Applies To key part of this property.)|
Enter the second key part of one or more field value rules that have the specified
as their first key part.
This key part of the field value rule is usually a Single Value property in that class. Its name does not have to match the name of the property you are defining.
Field value examples
For example, the standard property Work-.pyRootCause uses field value rules to define possible root causes for an exception-oriented work item.
The first key part of the field value rules that provides the acceptable values is Work- (the Applies To class for these rules). The second key part is the literal pyRootCause (the Field Name for these rules).
The final key part of these field value rules varies to provide specific values. Recommended values for the
User Error. These values are predefined through standard field value rules.
You can add field values as the application evolves, and the values can be updated without having to edit the pyRootCause property itself.
In comparison, the standard property Work-.pyStatusWork also is restricted to values defined by field value rules. However, for this property, an activity and a control enforces the restriction, rather than table validation.
Reviewing field value rules for the property
After you save the property, you can open the Property Explorer from the Property form's Advanced tab to locate and review the list of existing field value rules that match the specified field value class and field name:
- Click the Advanced tab. Click the Explore button at the bottom of the tab to start the Property Explorer in a new window
- On the Property Explorer, click the Field Values tab.
Class Key Value table validation
Class Key Value
to use a concrete class, rather than field value rules, as the source of acceptable values for the property.
Class Key Value
specifies a class to validate the input values against.
When you select
Class Key Value,
fields appear. Complete them to identify a range of keys in a class other than the
class of the property you are defining.
Select a concrete class that stores the set of acceptable values.
Depending on the number of keys defined for the class (in the
of the class's rule form, certain conditions must be met:
The second key value corresponds to a valid value for the property you are defining. The second key value must act to group values for the second key. The third key value must act to group values for the third key.
The second key value corresponds to a valid value for the property you are defining.
The second key value must act to group values for the second key.
The third key value must act to group values for the third key.
|Subset name (when appropriate)||
Optional if the
has only one key. Required if the
has more than one key. Enter the value of the key in the
that represents the subset that contains the list of acceptable values.
For example, if a class
If you leave this field blank, the system uses the Property Name of the property you are defining in the Property form as a default. (The Property Name is the second key part of this property.)
Class Key Value examples
Single key example: The standard class Rule-Obj-Class is used to validate values entered into the Applies To field in the Create form when creating a new rule. To validate that input entered into the Applies To field is a valid, existing class, the property associated with that field in the New dialog specifies Rule-Obj-Class as the Validation class . The Rule-Obj-Class class has one key defined in its Keys array.
Two key example: A class
has two keys defined in its
array — state code and county name. To restrict input values for a property at runtime to county names in New York state, specify
and "NY" as the
Three key example: The standard class Rule-Obj-FieldValue used to validate properties has three keys defined in its Keys array. The first is pyClassName, the second is pyFieldName and is used to group the values for the third key ( pyFieldValue ), which are the allowed input values.
Class Key Value
validation method is a generalization of the
method. For example, a
system has fifty-one (51) standard field value rules that identify codes for the fifty United States and the District of Columbia. These field value rules have
as the first key part (the
as the second key part (the
). The values for the third key part of these field value rules range from
(for Alaska) to
Two standard properties, Data-Party.pyHomeState and Data-Party.pyWorkState, use these field values through the Class Key Values method. Those properties specify:
- Rule-Obj-FieldValue for the Validation Class
- pyState for the Subset Name
At runtime, if your system contains other field value rules in this key range (in an application RuleSet) such as PR for Puerto Rico, the system uses them as acceptable values for pyHomeState and pyWorkState also.
Remote List table validation
when there are a large number of objects to be validated against (such as countries of the world) that you might not want to enter as individual values, or when the data changes frequently, but is available at runtime as the keys of a certain known class.
Whereas Class Key Value specifies a class to validate the input values against, Remote List specifies a particular instance of a class to validate against.
After you select
Remote List, complete the fields that appear.
|Class of instance||Select the class of the instance. After entering the class, you can skip to complete the Keys of instance fields and then return to complete the Reference to list or group field.|
|Reference to list or group||
Select a property that has one of the List or Group modes —
|Reference in each to scalar property||
Optional if the
Reference to list or group
Your choices depend on the
of the property in the
Reference to list or group
|Reference to localized value||Leave blank.|
|Keys of instance||Click the Add a row icon to add a key. This array identifies the instance that contains the property value that contains the set of values. Identify keys in the correct order, matching the class definition.|
|Key field||Enter the name of a property that is a key part of the class.|
|Value||Enter the value for this key part for the instance.|
Prompt List table validation
and complete the associated fields to provide a mapping between a list of text values used in the property value internally and corresponding text values presented on input or output. For example, the text values presented at runtime can be human-readable labels that end users see and choose from, while the corresponding stored values can be shorter, easy-to-machine-reference values.
When you use
. At runtime, a selection list displaying the
values is presented to the user. If the values have been localized using the Localization wizard, the appropriate translated values are presented.
tables are used when you want the actual value stored in the clipboard to be different from the value presented to the user 'on the glass' at runtime. This choice allows users to see information from the
column on both input and display, while the system internally maintains the corresponding value from the
column. For example, when the
specifies a short value like EDate, the corresponding
can be a more human-readable value like Date to complete this task. The
is the value stored in the clipboard, and the
is the value displayed to the user at runtime.
This feature is most useful to support localization. The Localization wizard localizes the values specified in the Prompt value field. When the wizard runs, it creates the appropriate field value rules for the Prompt Value entries, and then those field value rules are used to hold the translated text.
|Prompt values||Click the Add a row icon to add a prompt. This array identifies the mapping of the internal values to the runtime-presentation ('on the glass') values.|
|Standard value||Enter a value. The system stores this value internally as the property value.|
|Prompt value||Specify the runtime-presentation alternative value. Use the SmartPrompt to select from available field value rules.|Previous topic Property form - Completing the General tab for Java Object modes Next topic Property form - Completing the Advanced tab