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

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Here is the source code for org.metawidget.vaadin.ui.widgetbuilder.ReadOnlyWidgetBuilder.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.Collection;
import java.util.Date;
import java.util.Map;

import org.metawidget.util.CollectionUtils;
import org.metawidget.util.WidgetBuilderUtils;
import org.metawidget.vaadin.ui.VaadinMetawidget;
import org.metawidget.widgetbuilder.iface.WidgetBuilder;

import com.vaadin.ui.Button;
import com.vaadin.ui.Component;
import com.vaadin.ui.Label;
import com.vaadin.ui.Panel;
import com.vaadin.ui.TextArea;

/**
 * WidgetBuilder for Vaadin environments.
 * <p>
 * Creates native Vaadin read-only <code>Components</code>, such as <code>Labels</code>, to suit the
 * inspected fields.
 *
 * @author Loghman Barari
 */

public class ReadOnlyWidgetBuilder implements WidgetBuilder<Component, VaadinMetawidget> {

    //
    // Public methods
    //

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

        // Not read-only?

        if (!WidgetBuilderUtils.isReadOnly(attributes)) {
            return null;
        }

        // Hidden

        if (TRUE.equals(attributes.get(HIDDEN))) {
            return null;
        }

        // Action

        if (ACTION.equals(elementName)) {
            Button button = new Button(metawidget.getLabelString(attributes));
            button.setEnabled(false);

            return button;
        }

        if (TRUE.equals(attributes.get(MASKED))) {
            return new Panel();
        }

        // Lookups

        String lookup = attributes.get(LOOKUP);

        if (lookup != null && !"".equals(lookup)) {
            // May have alternate labels

            String lookupLabels = attributes.get(LOOKUP_LABELS);

            if (lookupLabels != null && !"".equals(lookupLabels)) {
                return new LookupLabel(CollectionUtils.newHashMap(CollectionUtils.fromString(lookup),
                        CollectionUtils.fromString(lookupLabels)));
            }

            return new Label();
        }

        // Lookup the Class

        Class<?> clazz = WidgetBuilderUtils.getActualClassOrType(attributes, String.class);

        if (clazz != null) {
            // Primitives

            if (clazz.isPrimitive()) {
                return new Label();
            }

            if (String.class.equals(clazz)) {
                if (TRUE.equals(attributes.get(LARGE))) {
                    TextArea textarea = new TextArea();
                    textarea.setReadOnly(true);

                    return textarea;
                }

                return new Label();
            }

            if (Character.class.equals(clazz)) {
                return new Label();
            }

            if (Date.class.equals(clazz)) {
                return new Label();
            }

            if (Boolean.class.equals(clazz)) {
                return new Label();
            }

            if (Number.class.isAssignableFrom(clazz)) {
                return new Label();
            }

            // Collections

            if (Collection.class.isAssignableFrom(clazz)) {
                return null;
            }
        }

        // Not simple, but don't expand

        if (TRUE.equals(attributes.get(DONT_EXPAND))) {
            return new Label();
        }

        // Nested Metawidget

        return null;
    }
}