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Utility classes developed at Adrian Smith Software (A.S.S.)

There is a newer version: 21.0.1

package com.databasesandlife.util.wicket;

import java.util.Set;

import org.apache.wicket.model.IModel;

/**
 * A model modeling "true" or "false" based upon whether an element is in a Set.
 *
 * @author This source is copyright Adrian Smith and licensed under the LGPL 3.
 * @see Project on GitHub
 */
@SuppressWarnings("serial")
public class BooleanSetModel implements IModel {
    final protected Set set;
    final E element;
    public BooleanSetModel(Set s, E e) { set=s; element=e; }
    @Override public void detach() {  }
    @Override public Boolean getObject() { return set.contains(element); }
    @Override public void setObject(Boolean x) { if (x) set.add(element); else set.remove(element); }
}