Java tutorial
/* Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package org.primaldev.ppm.util; import java.util.Iterator; import org.activiti.engine.ActivitiException; import org.dussan.vaadin.dcharts.DCharts; import org.dussan.vaadin.dcharts.base.elements.XYaxis; import org.dussan.vaadin.dcharts.base.elements.XYseries; import org.dussan.vaadin.dcharts.base.renderers.MarkerRenderer; import org.dussan.vaadin.dcharts.data.DataSeries; import org.dussan.vaadin.dcharts.data.Ticks; import org.dussan.vaadin.dcharts.metadata.LegendPlacements; import org.dussan.vaadin.dcharts.metadata.XYaxes; import org.dussan.vaadin.dcharts.metadata.renderers.AxisRenderers; import org.dussan.vaadin.dcharts.metadata.renderers.LabelRenderers; import org.dussan.vaadin.dcharts.metadata.renderers.SeriesRenderers; import org.dussan.vaadin.dcharts.metadata.styles.MarkerStyles; import org.dussan.vaadin.dcharts.options.Axes; import org.dussan.vaadin.dcharts.options.AxesDefaults; import org.dussan.vaadin.dcharts.options.Highlighter; import org.dussan.vaadin.dcharts.options.Legend; import org.dussan.vaadin.dcharts.options.Options; import org.dussan.vaadin.dcharts.options.Series; import org.dussan.vaadin.dcharts.options.SeriesDefaults; import com.fasterxml.jackson.databind.JsonNode; import com.fasterxml.jackson.databind.ObjectMapper; import com.vaadin.ui.Component; import com.vaadin.ui.GridLayout; import com.vaadin.ui.Label; import com.vaadin.ui.themes.Reindeer; /** * @author Joram Barrez */ public class ChartTypeGenerator { public static final String CHART_TYPE_BAR_CHART = "barChart"; public static final String CHART_TYPE_PIE_CHART = "pieChart"; public static final String CHART_TYPE_LINE_CHART = "lineChart"; public static final String CHART_TYPE_LIST = "list"; public static ChartTypeComponent generateChart(byte[] reportData) { // Convert json to pojo JsonNode jsonNode = convert(reportData); // Title JsonNode titleNode = jsonNode.get("title"); String title = null; if (titleNode != null) { title = titleNode.textValue(); } ChartTypeComponent chartComponent = new ChartTypeComponent(title); // Retrieve data sets JsonNode datasetsNode = jsonNode.get("datasets"); // If no data was returned if (datasetsNode.size() == 0) { chartComponent.addChart(null, null, "Not enough data"); return chartComponent; } if (datasetsNode != null && datasetsNode.isArray()) { Iterator<JsonNode> dataIterator = datasetsNode.iterator(); while (dataIterator.hasNext()) { JsonNode datasetNode = dataIterator.next(); JsonNode descriptionNode = datasetNode.get("description"); String description = null; if (descriptionNode != null) { description = descriptionNode.textValue(); } JsonNode dataNode = datasetNode.get("data"); if (dataNode == null || dataNode.size() == 0) { chartComponent.addChart(description, null, "Not enough data"); } else { String[] names = new String[dataNode.size()]; Number[] values = new Number[dataNode.size()]; int index = 0; Iterator<String> fieldIterator = dataNode.fieldNames(); while (fieldIterator.hasNext()) { String field = fieldIterator.next(); names[index] = field; values[index] = dataNode.get(field).numberValue(); index++; } // Generate chart (or 'no data' message) if (names.length > 0) { Component chart = createChart(datasetNode, names, values); chartComponent.addChart(description, chart, null); } else { chartComponent.addChart(description, null, "Not enough data"); } } } } return chartComponent; } protected static Component createChart(JsonNode dataNode, String[] names, Number[] values) { String type = dataNode.get("type").textValue(); JsonNode xAxisNode = dataNode.get("xaxis"); String xAxis = null; if (xAxisNode != null) { xAxis = xAxisNode.textValue(); } JsonNode yAxisNode = dataNode.get("yaxis"); String yAxis = null; if (yAxisNode != null) { yAxis = yAxisNode.textValue(); } Component chart = null; if (CHART_TYPE_BAR_CHART.equals(type)) { DataSeries dataSeries = new DataSeries().add((Object[]) values); SeriesDefaults seriesDefaults = new SeriesDefaults().setRenderer(SeriesRenderers.BAR); Axes axes = new Axes().addAxis( new XYaxis().setRenderer(AxisRenderers.CATEGORY).setTicks(new Ticks().add((Object[]) names))); Highlighter highlighter = new Highlighter().setShow(false); Options options = new Options().setSeriesDefaults(seriesDefaults).setAxes(axes) .setHighlighter(highlighter); options.setAnimate(true); options.setAnimateReplot(true); chart = new DCharts().setDataSeries(dataSeries).setOptions(options); } else if (CHART_TYPE_PIE_CHART.equals(type)) { DataSeries dataSeries = new DataSeries().newSeries(); for (int i = 0; i < names.length; i++) { dataSeries.add(names[i], values[i]); } SeriesDefaults seriesDefaults = new SeriesDefaults().setRenderer(SeriesRenderers.PIE); Options options = new Options().setSeriesDefaults(seriesDefaults); options.setAnimate(true); options.setAnimateReplot(true); Legend legend = new Legend().setShow(true).setPlacement(LegendPlacements.INSIDE); options.setLegend(legend); Highlighter highlighter = new Highlighter().setShow(true); options.setHighlighter(highlighter); chart = new DCharts().setDataSeries(dataSeries).setOptions(options); } else if (CHART_TYPE_LINE_CHART.equals(type)) { AxesDefaults axesDefaults = new AxesDefaults().setLabelRenderer(LabelRenderers.CANVAS); Axes axes = new Axes() .addAxis(new XYaxis().setLabel(xAxis != null ? xAxis : "").setMin(names[0]) .setMax(names[values.length - 1]).setDrawMajorTickMarks(true)) .addAxis(new XYaxis(XYaxes.Y).setLabel(yAxis != null ? yAxis : "").setDrawMajorTickMarks(true)); Options options = new Options().setAxesDefaults(axesDefaults).setAxes(axes); DataSeries dataSeries = new DataSeries().newSeries(); for (int i = 0; i < names.length; i++) { // if (parseLong(names[i]) != null) { // dataSeries.add(parseLong(names[i]), values[i]); // } else if (parseDouble(names[i]) != null) { // dataSeries.add(parseDouble(names[i]), values[i]); // } else { // dataSeries.add(names[i], values[i]); // } dataSeries.add(names[i], values[i]); } Series series = new Series().addSeries(new XYseries().setShowLine(true).setMarkerOptions( new MarkerRenderer().setShadow(true).setSize(7).setStyle(MarkerStyles.CIRCLE))); options.setSeries(series); options.setAnimate(true); options.setAnimateReplot(true); Highlighter highlighter = new Highlighter().setShow(true); options.setHighlighter(highlighter); chart = new DCharts().setDataSeries(dataSeries).setOptions(options); } else if (CHART_TYPE_LIST.equals(type)) { GridLayout grid = new GridLayout(2, names.length); grid.setSpacing(true); for (int i = 0; i < names.length; i++) { String name = names[i]; Label nameLabel = new Label(name); nameLabel.addStyleName(Reindeer.LABEL_H2); grid.addComponent(nameLabel, 0, i); Number value = values[i]; Label valueLabel = new Label(value + ""); grid.addComponent(valueLabel, 1, i); } chart = grid; } if (chart instanceof DCharts) { // Needed, otherwise the chart will not be shown ((DCharts) chart).show(); } return chart; } protected static JsonNode convert(byte[] jsonBytes) { try { ObjectMapper objectMapper = new ObjectMapper(); return objectMapper.readTree(jsonBytes); } catch (Exception e) { throw new ActivitiException("Report dataset contains invalid json", e); } } protected static Long parseLong(String s) { try { Long value = Long.parseLong(s); return value; } catch (NumberFormatException e) { return null; } } protected static Double parseDouble(String s) { try { Double value = Double.parseDouble(s); return value; } catch (NumberFormatException e) { return null; } } }