Add DataProvider for Table and Select controls
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Key: CLK-640
URL: https://issues.apache.org/jira/browse/CLK-640
Project: Click
Issue Type: New Feature
Components: core
Affects Versions: 2.1.0
Reporter: Malcolm Edgar
Fix For: 2.2.0
One reoccurring problem we see with people using Click is the inappropriate use
of the Page#onRender() method. Typically its used to set data into the Table
control, but then people will often use this Page method to set data in other
controls such as the FormTable or Select controls, which breaks their usage
contract.
What I would like to see is that data controls such as the Table, Select and
FormTable are able to load the data when they need it, rather than having to
rely on the developer injecting the data at the correct point in the pages life
cycle. This will provide an improve programming model where developers simply
create their controls in the Page constructor or onInit() method, configure
data providers when necessary, and write up control event handlers to the
appropriate methods.
The DataProvider interface would be very simple:
public interface DataProvider {
public List getData();
}
Developers would then implement this interface when creating their controls:
Table table = new Table();
table.addColumn()
...
table.setDataProvider(new DataProvider() {
public List getData() {
return customerDao.getCustomerList();
}
});
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