org.eclipse.osbp.runtime.web.vaadin.databinding/src/org/eclipse/osbp/runtime/web/vaadin/databinding/model/internal/GridSelectionValueProperty.java

/**
 * Copyright (c) 2011, 2015 - Lunifera GmbH (Gross Enzersdorf, Austria), Loetz GmbH&Co.KG (69115 Heidelberg, Germany)
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0 
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *         Florian Pirchner - Initial implementation
 */

package org.eclipse.osbp.runtime.web.vaadin.databinding.model.internal;

import org.eclipse.core.databinding.property.INativePropertyListener;
import org.eclipse.core.databinding.property.ISimplePropertyListener;
import org.eclipse.osbp.runtime.web.vaadin.databinding.properties.AbstractVaadinValueProperty;

import com.vaadin.ui.Grid;
import com.vaadin.ui.Grid.SelectionModel;
import com.vaadin.ui.Grid.SelectionModel.Multi;

/**
 */
public class GridSelectionValueProperty extends AbstractVaadinValueProperty {

	private Class<?> valueType;

	public GridSelectionValueProperty(Class<?> valueType) {
		this.valueType = valueType;
	}

	@Override
	public Object getValueType() {
		return valueType;
	}

	@Override
	public INativePropertyListener adaptListener(
			ISimplePropertyListener listener) {
		return new SelectionNotifierValueChangeListener(this, listener);
	}

	@Override
	protected Object doGetValue(Object source) {
		SelectionModel model = ((Grid) source).getSelectionModel();
		if (model instanceof SelectionModel.Single) {
			return ((SelectionModel.Single) model).getSelectedRow();
		} else if (model instanceof SelectionModel.Multi) {
			SelectionModel.Multi cModel = (Multi) model;
			return cModel.getSelectedRows().stream().findFirst().orElse(null);
		}
		return null;
	}

	@Override
	protected void doSetValue(Object source, Object value) {
		SelectionModel model = ((Grid) source).getSelectionModel();
		if (model instanceof SelectionModel.Single) {
			((SelectionModel.Single) model).select(value);
		} else if (model instanceof SelectionModel.Multi) {
			SelectionModel.Multi cModel = (Multi) model;
			cModel.deselectAll();
			cModel.select(value);
		}
	}
}