We have a use case which requires an enabled link inside a disabled form.
The form being disabled is based on user's security role, but the link
being enabled depends on the results returned from a separate database
query. Thus, we might have a disabled form, but an enabled link, or vice
versa. Our link class (below) implements IAuthorizationStrategy, but for
some reason, when the parent form is disabled, and the link is enabled,
the onClick() method is not called.
Can anyone see what we're doing wrong?
We use Wicket 1.4.17 (no option to upgrade due to corporate framework
constraints).
______________________________________________________
package com.uprr.enm.web.track.detail;
import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.authorization.Action;
import org.apache.wicket.authorization.IAuthorizationStrategy;
import com.uprr.eni.commons.util.ApiLog;
import com.uprr.eni.valid.tracks.TrackAttribute;
import com.uprr.enm.dao.jdbc.track.history.TrackHistoryReadDAO;
import com.uprr.enm.web.track.history.HistoryModal;
import
com.uprr.ui.wicket.components.ajax.listener.RemovePleaseWaitAjaxListener;
import com.uprr.ui.wicket.components.behavior.PleaseWaitBehavior;
//-----------------------------------------------------------------------------------------------
/**
* A link to open a track history modal. This class lets us have a working
history link even if
* the parent form is disabled.
*/
class TrackHistoryLink extends AjaxLink<Object> implements
IAuthorizationStrategy {
private static final long serialVersionUID = 4693199534296169911L;
private TrackAttribute attribute ;
private HistoryModal modal ;
private Integer track ;
//-----------------------------------------------------------------------------------------------
/**
* Constructor.
* @param id Markup ID.
* @param track Track system number.
* @param attribute The track attribute for which history is desired.
* @param dao Data access object to provide track history.
* @param modal Dialog to display the history data.
*/
public TrackHistoryLink(final String id, final Integer track, final
TrackAttribute attribute,
final TrackHistoryReadDAO dao, final HistoryModal modal) {
super(id);
if (dao.historyExists(track, attribute)) { // If track has
history records
setEnabled(true);
add(new PleaseWaitBehavior());
this.track = track;
this.modal = modal;
this.attribute = attribute;
} else {
setEnabled(false);
}
ApiLog.debug("%s history link is %s%n", attribute, isEnabled() ?
"enabled" : "disabled");
}
//-----------------------------------------------------------------------------------------------
@Override public boolean isActionAuthorized(final Component component,
final Action action) {
return true;
}
//-----------------------------------------------------------------------------------------------
@Override public <T extends Component> boolean isInstantiationAuthorized
(final Class<T> componentClass) {
return true;
}
//-----------------------------------------------------------------------------------------------
@Override public void onClick(final AjaxRequestTarget ajax) {
ajax.addListener(RemovePleaseWaitAjaxListener.getInstance());
modal.show(track, attribute, ajax);
}
//-----------------------------------------------------------------------------------------------
}
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