/* Copyright (c) 2001 - 2007 TOPP - www.openplans.org. All rights reserved.
* This code is licensed under the GPL 2.0 license, available at the root
* application directory.
*/
package org.geoserver.web.data;
import java.util.List;
import org.apache.wicket.Component;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.ajax.markup.html.AjaxLink;
import org.apache.wicket.model.StringResourceModel;
import org.geoserver.catalog.CascadeDeleteVisitor;
import org.geoserver.catalog.Catalog;
import org.geoserver.catalog.CatalogInfo;
import org.geoserver.web.GeoServerApplication;
import org.geoserver.web.wicket.GeoServerDialog;
import org.geoserver.web.wicket.GeoServerTablePanel;
import org.geoserver.web.wicket.ParamResourceModel;
/**
* A reusable cascading, multiple removal link. Assumes the presence of a table
* panel filled with catalog objects and a {@link GeoServerDialog} to be used
* for reporting the objects that will be affected by the removal
*/
@SuppressWarnings("serial")
public class SelectionRemovalLink extends AjaxLink {
GeoServerTablePanel<? extends CatalogInfo> catalogObjects;
GeoServerDialog dialog;
public SelectionRemovalLink(String id, GeoServerTablePanel<? extends CatalogInfo> catalogObjects, GeoServerDialog dialog) {
super(id);
this.catalogObjects = catalogObjects;
this.dialog = dialog;
}
@Override
public void onClick(AjaxRequestTarget target) {
// see if the user selected anything
final List<? extends CatalogInfo> selection = catalogObjects.getSelection();
if(selection.size() == 0)
return;
dialog.setTitle(new ParamResourceModel("confirmRemoval", this));
// if there is something to cancel, let's warn the user about what
// could go wrong, and if the user accepts, let's delete what's needed
dialog.showOkCancel(target, new GeoServerDialog.DialogDelegate() {
protected Component getContents(String id) {
// show a confirmation panel for all the objects we have to remove
return new ConfirmRemovalPanel(id, selection) {
@Override
protected StringResourceModel canRemove(CatalogInfo info) {
return SelectionRemovalLink.this.canRemove(info);
}
};
}
protected boolean onSubmit(AjaxRequestTarget target, Component contents) {
// cascade delete the whole selection
Catalog catalog = GeoServerApplication.get().getCatalog();
CascadeDeleteVisitor visitor = new CascadeDeleteVisitor(catalog);
for (CatalogInfo ci : selection) {
ci.accept(visitor);
}
// the deletion will have changed what we see in the page
// so better clear out the selection
catalogObjects.clearSelection();
return true;
}
@Override
public void onClose(AjaxRequestTarget target) {
// if the selection has been cleared out it's sign a deletion
// occurred, so refresh the table
if(catalogObjects.getSelection().size() == 0) {
setEnabled(false);
target.addComponent(SelectionRemovalLink.this);
target.addComponent(catalogObjects);
}
}
});
}
/**
* Determines if a catalog object can be removed or not.
* <p>
* This method returns non-null in cases where the object should not be be
* removed. The return value should be a description or reason of why the
* object can not be removed.
* </p>
* @param info The object to be removed.
*
* @return A message stating why the object can not be removed, or null to
* indicate that it can be removed.
*/
protected StringResourceModel canRemove(CatalogInfo info) {
return null;
}
}