Most tapestry components take the approach of using the "id" parameter (not
to be confused with t:id) if one is provided. If an "id" is not provided, a
clientId is generated which is guaranteed not to clash with other id's on
the page.
public class MyComponent implements ClientElement {
@Environmental
private JavaScriptSupport jss;
@Parameter(name = "id", defaultPrefix = BindingConstants.LITERAL)
private String idParameter;
@Inject
private ComponentResources resources;
void beginRender(MarkupWriter writer) {
clientId = resources.isBound("id") ? idParameter :
jss.allocateClientId(resources);
writer.element("div", "id", clientId);
...
}
@Override
public String getClientId() {
return clientId;
}
}
