org.metawidget.vaadin.ui.widgetbuilder.OverriddenWidgetBuilder.java Source code

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Here is the source code for org.metawidget.vaadin.ui.widgetbuilder.OverriddenWidgetBuilder.java

Source

// Metawidget
//
// For historical reasons, this file is licensed under the LGPL
// (http://www.gnu.org/licenses/lgpl-2.1.html).
//
// Most other files in Metawidget are licensed under both the
// LGPL/EPL and a commercial license. See http://metawidget.org
// for details.

package org.metawidget.vaadin.ui.widgetbuilder;

import static org.metawidget.inspector.InspectionResultConstants.*;

import java.util.List;
import java.util.Map;

import org.metawidget.vaadin.ui.VaadinMetawidget;
import org.metawidget.widgetbuilder.iface.WidgetBuilder;

import com.vaadin.ui.AbstractComponent;
import com.vaadin.ui.Component;

/**
 * WidgetBuilder for overridden widgets in Vaadin environments.
 * <p>
 * Locates overridden widgets based on their <code>setData</code>.
 *
 * @author Loghman Barari
 */

public class OverriddenWidgetBuilder implements WidgetBuilder<Component, VaadinMetawidget> {

    //
    // Public methods
    //

    public Component buildWidget(String elementName, Map<String, String> attributes, VaadinMetawidget metawidget) {

        String name = attributes.get(NAME);

        if (name == null) {
            return null;
        }

        Component component = null;
        List<AbstractComponent> existingUnusedComponents = metawidget.fetchExistingUnusedComponents();

        for (AbstractComponent componentExisting : existingUnusedComponents) {
            if (name.equals(componentExisting.getData())) {
                component = componentExisting;
                break;
            }
        }

        if (component != null) {
            existingUnusedComponents.remove(component);
        }

        return component;
    }
}