org.apache.wicket.bean.validation.GroupsModel Maven / Gradle / Ivy
package org.apache.wicket.bean.validation;
import java.util.ArrayList;
import org.apache.wicket.model.LoadableDetachableModel;
import org.apache.wicket.util.reference.ClassReference;
/**
* A model that can hold on to an array of classes. Useful for keeping a definition of validation
* groups to be used to restrict validation.
*
* @author igor
*/
public class GroupsModel extends LoadableDetachableModel[]>
{
private static final Class[] EMPTY = new Class[0];
private final ArrayList> groups;
/**
* Constructor
*
* @param groups
* an array of groups or {@code null} for none
*/
public GroupsModel(Class... groups)
{
if (groups == null || groups.length == 0)
{
this.groups = null;
}
else
{
this.groups = new ArrayList<>();
for (Class group : groups)
{
this.groups.add(ClassReference.of(group));
}
this.groups.trimToSize();
}
}
@Override
protected Class[] load()
{
if (groups == null)
{
return EMPTY;
}
Class[] classes = new Class[groups.size()];
for (int i = 0; i < groups.size(); i++)
{
classes[i] = groups.get(i).get();
}
return classes;
}
}