Application: gvSIG desktop

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Objects;

import org.apache.commons.lang3.math.NumberUtils;

import org.gvsig.tools.util.GetItemByKey;

import org.gvsig.tools.util.GetItemWithSize;

import org.jfree.data.statistics.BoxAndWhiskerItem;

import org.jfree.data.statistics.DefaultBoxAndWhiskerCategoryDataset;

import org.jfree.data.statistics.DefaultBoxAndWhiskerXYDataset;

	public CreateChartPanelFunction() {

		super(

			Function.GROUP_PROGRAMMING,

			"CREATE_CHARTPANEL",

			Range.between(1, 2),

			"",

			"CREATE_CHARTPANEL" + "({{string}})",

			null,

			"ChartPanel",

			false

		);

	}

	@Override

	public boolean allowConstantFolding() {

		return false;

	}

	@Override

	public Object call(Interpreter interpreter, final Object[] args) throws Exception {

		Object obj = getObject(args, 0);

		if (obj == null) {

			return null;

			//throw new ExpressionRuntimeException("Null is not valid in "+FUNCTION_GETITEM+" function.");

		}

		if (!(obj instanceof JsonObject)) {

			obj = JsonUtils.toJsonObject(obj);

		}

		Object obj1 = getObject(args, 1);

		GetItemWithSize dataset = null;

		if ((obj1 instanceof GetItemWithSize)) {

			dataset = ((GetItemWithSize) obj1);

		}

		JsonObject jsonobj = ((JsonObject) obj);

		ChartPanel graph = createGraph(jsonobj, dataset);

		return graph;

	}

	public ChartPanel createGraph(JsonObject json, GetItemWithSize<GetItemByKey> dataset) {

		String chartType = json.getString("chartType").toLowerCase();

		switch (chartType) {

			case "boxandwhisker": {

				String valueField = json.getString("valueField");

				HashMap<String, HashMap<String, List<Number>>> tree = new HashMap<String, HashMap<String, List<Number>>>();

				String field1 = json.getString("field1");

				String field2 = json.getString("field2");

				for (int i = 0; i < dataset.size(); i++) {

					GetItemByKey element = dataset.get(i);

					String rowValue = Objects.toString(element.get(field1), null);

					String colValue = Objects.toString(element.get(field2), null);

					double elementValue = NumberUtils.toDouble(Objects.toString(element.get(valueField), null));

					if (tree.containsKey(rowValue)) {

						HashMap<String, List<Number>> colTree = tree.get(rowValue);

						if (colTree.containsKey(colValue)) {

							colTree.get(colValue).add(elementValue);

						} else {

							ArrayList<Number> list = new ArrayList<Number>();

							list.add(elementValue);

							colTree.put(colValue, list);

						}

					} else {

						HashMap<String, List<Number>> e = new HashMap<String, List<Number>>();

						ArrayList<Number> list = new ArrayList<Number>();

						list.add(elementValue);

						e.put(colValue, list);

						tree.put(rowValue, e);

					}

				}

				DefaultBoxAndWhiskerCategoryDataset ds = new DefaultBoxAndWhiskerCategoryDataset();

				for (String rowKey : tree.keySet()) {

					for (String colKey : tree.get(rowKey).keySet()) {

						ds.add(tree.get(rowKey).get(colKey), rowKey, colKey);

					}

				}

				try {

				} catch (Exception ex) {

					throw new RuntimeException("Not able to retrieve values", ex);

				}

				JFreeChart boxAndWhiskerChart = ChartFactory.createBoxAndWhiskerChart(

					json.getString("title", ""),

					json.getString("categoryAxisLabel", ""),

					json.getString("valueAxisLabel", ""),

					ds,

					json.getBoolean("legend", true));

				ChartPanel chartPanel = new ChartPanel(boxAndWhiskerChart);

				chartPanel.setPreferredSize(new Dimension(json.getInt("witdh", 360), json.getInt("height", 200)));

				return chartPanel;

			}

			case "barchart": {

				DefaultCategoryDataset ds = new DefaultCategoryDataset();

				if (dataset == null) {

					JsonArray datasetJson = json.getJsonArray("dataset");

					for (JsonValue jsonValue : datasetJson) {

						JsonArray element = (JsonArray) jsonValue;

						double value = element.getJsonNumber(0).doubleValue();

						String field1 = element.getString(1, null);

						String field2 = element.getString(2, null);

						ds.addValue(value, field1, field2);

					}

				} else {

					String valueField = json.getString("valueField");

					String field1 = json.getString("field1");

					String field2 = json.getString("field2");

					for (int i = 0; i < dataset.size(); i++) {

						GetItemByKey element = dataset.get(i);

						try {

							ds.addValue(NumberUtils.toDouble(Objects.toString(element.get(valueField), null), Double.NaN),

								Objects.toString(element.get(field1), null),

								Objects.toString(element.get(field2), null));

						} catch (Exception ex) {

							throw new RuntimeException("Not able to retrieve values", ex);

						}

					}

				}

				JFreeChart barChart = ChartFactory.createBarChart(

					json.getString("title", ""),

					json.getString("categoryAxisLabel", ""),

					json.getString("valueAxisLabel", ""),

					ds,

					StringUtils.equalsIgnoreCase(json.getString("orientation", null), "HORIZONTAL") ? PlotOrientation.HORIZONTAL : PlotOrientation.VERTICAL,

					json.getBoolean("legend", true),

					false,

					false);

				ChartPanel chartPanel = new ChartPanel(barChart);

				chartPanel.setPreferredSize(new Dimension(json.getInt("witdh", 360), json.getInt("height", 200)));

				return chartPanel;

			}

			default:

				throw new IllegalArgumentException("Unknown chart type:" + chartType);

		}

	}