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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.awt.Color;
import java.util.Collection;
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.linechart.LineChartSettings;

import com.google.gson.annotations.SerializedName;

/**
 * Line chart widget
 *
 * @author Paul van Assen
 */
public class LineChart extends Push {

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

    private final LineChartSettings settings = new LineChartSettings();

    public LineChart(String widgetKey) {
        super(widgetKey);
    }

    public void addDataPoint(String dataPoint) {
        items.add(dataPoint);
    }

    public void setAxisXLabels(Collection labels) {
        settings.getAxisx().clear();
        settings.getAxisx().addAll(labels);
    }

    public void setAxisYLabels(Collection labels) {
        settings.getAxisy().clear();
        settings.getAxisy().addAll(labels);
    }

    public void setColor(Color color) {
        settings.setColor(color);
    }

    @Override
    protected void validate() throws ValidationException {
        if (items.size() == 0) {
            throw new ValidationException("item", "Must be filled");
        }
        if (settings.getAxisx().size() == 0) {
            throw new ValidationException("axisx", "Must be filled");
        }
        if (settings.getAxisy().size() == 0) {
            throw new ValidationException("axisy", "Must be filled");
        }
    }
}