When defining text input controls, the default server behavior allows empty strings, even if you've configured a regular expression and made the input control mandatory. Use this setting to enforce the regular expression even on empty strings. This forces the user to provide a conforming value for the input control.
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Input Control Behavior |
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Configuration File |
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.../WEB-INF/applicationContext-cascade.xml |
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Bean |
Description |
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applyRegexpToEmptyString |
The default value of false gives the traditional behavior: even if a regular expression is defined, it is not applied to empty strings. If you want to strictly enforce the regular expression, even on empty input strings, set this property to true. |
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