Improve Form validation for subclasses to implement business and cross-field
validation
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Key: CLK-572
URL: https://issues.apache.org/jira/browse/CLK-572
Project: Click
Issue Type: Improvement
Components: core
Affects Versions: 2.1.0 RC1
Reporter: Bob Schellink
Assignee: Bob Schellink
Fix For: 2.1.0
Its currently not possible for Form subclasses to override and implement custom
business and cross-field validation logic in the #validate method, because the
validate method is invoked *before* the Field values are processed and bound to
request values.
Proposed solution is to rename the current Form.validate() method to
Form.validateFileUpload (because that is what is currently does) and introduce
a new empty validate method which subclasses can override. This is consistent
with the approach taken by Field which also provide an empty validate method
which subclasses can implement.
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