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A Java API to generate highchart json on the server side.

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package nl.pvanassen.geckoboard.api.widget;

import java.util.LinkedList;
import java.util.List;

import nl.pvanassen.geckoboard.api.Push;
import nl.pvanassen.geckoboard.api.error.ValidationException;
import nl.pvanassen.geckoboard.api.json.list.ListItem;

import com.google.gson.annotations.SerializedName;

/**
 * List widget type http://www.geckoboard.com/developers/custom-widgets/widget-types/list
 *
 * @author Paul van Assen
 */
public class ListWidget extends Push {

    @SerializedName("item")
    private final List items = new LinkedList();

    protected ListWidget(String widgetKey) {
        super(widgetKey);
    }

    /**
     * Create an item that can be filled by the app
     *
     * @return A newly created item
     */
    public ListItem createItem(String text) {
        ListItem item = new ListItem(text);
        items.add(item);
        return item;
    }

    @Override
    protected void validate() throws ValidationException {
        if (items.size() == 0) {
            throw new ValidationException("Items", "Must be filled");
        }
    }

}