DynamicAttributeModifier.java

/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

package net.rrm.ehour.ui.common.component;

import org.apache.wicket.AttributeModifier;
import org.apache.wicket.Component;
import org.apache.wicket.model.IModel;

/**
 * Attribute modifier in which the model determines whether it's enabled or not
 */

public class DynamicAttributeModifier extends AttributeModifier {
    private static final long serialVersionUID = 4038138991690100212L;

    private IModel<Boolean> enablingModel;
    private boolean reverseResult;

	public DynamicAttributeModifier(String attribute,
                                    IModel<?> replaceModel, IModel<Boolean> enablingModel)
	{
		this(attribute, replaceModel, enablingModel, false);
	}

    public DynamicAttributeModifier(String attribute,
                                    IModel<?> replaceModel, IModel<Boolean> enablingModel, boolean reverseResult) {
        super(attribute, replaceModel);
        this.enablingModel = enablingModel;
        this.reverseResult = reverseResult;
    }

    @Override
    public boolean isEnabled(Component comp) {
        return (reverseResult)
                ? enablingModel.getObject()
                : !enablingModel.getObject();
    }
}