BytesModel.java

package fr.openwide.core.wicket.more.markup.html.model;

import org.apache.wicket.model.AbstractReadOnlyModel;
import org.apache.wicket.model.IModel;
import org.apache.wicket.util.lang.Bytes;

public class BytesModel extends AbstractReadOnlyModel<Bytes> {
	
	private static final long serialVersionUID = -4537289783663569276L;
	
	private final IModel<Long> wrappedModel;
	
	private final BytesUnit unit;
	
	public static BytesModel ofLong(IModel<Long> wrappedModel, BytesUnit unit) {
		return new BytesModel(wrappedModel, unit);
	}
	
	private BytesModel(IModel<Long> wrappedModel, BytesUnit unit) {
		if (wrappedModel == null || unit == null) {
			throw new IllegalArgumentException("model and unit cannot be null");
		}
		this.wrappedModel = wrappedModel;
		this.unit = unit;
	}

	@Override
	public Bytes getObject() {
		Long longValue = wrappedModel.getObject();
		return longValue == null ? null : unit.fromLong(longValue);
	}

	@Override
	public void detach() {
		super.detach();
		wrappedModel.detach();
	}
}