Mercurial > dive4elements > river

annotate flys-client/src/main/java/de/intevation/flys/client/server/ChartOutputServiceImpl.java @ 1344:51d4b51a51ed

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Added icons to export chart as PNG, PDF and SVG to the ChartToolbar. flys-client/trunk@2998 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Mon, 17 Oct 2011 17:33:27 +0000
parents e74bf6bfeeb6
children ab8eb2f544f2
rev   line source
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9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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1 package de.intevation.flys.client.server;
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2
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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3 import java.io.OutputStream;
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4 import java.io.IOException;
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5 import java.util.HashMap;
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6 import java.util.Map;
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7
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8 import org.w3c.dom.Document;
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10 import javax.servlet.http.HttpServlet;
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11 import javax.servlet.http.HttpServletRequest;
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12 import javax.servlet.http.HttpServletResponse;
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13
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14 import de.intevation.artifacts.common.utils.ClientProtocolUtils;
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16 import de.intevation.artifacts.httpclient.http.HttpClient;
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17 import de.intevation.artifacts.httpclient.http.HttpClientImpl;
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9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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19
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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20 /**
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21 * This service is used to request a chart from the artifact server. The
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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22 * response is directed directly to the output stream, so the image that is
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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23 * retrieved is displayed in the UI afterwards.
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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24 *
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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25 * @author <a href="mailto:ingo.weinzierl@intevation.de">Ingo Weinzierl</a>
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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26 */
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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27 public class ChartOutputServiceImpl
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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28 extends HttpServlet
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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29 {
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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30 public void doGet(HttpServletRequest req, HttpServletResponse resp) {
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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31 System.out.println("ChartOutputServiceImpl.doGet");
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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32
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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33 try {
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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34 OutputStream out = resp.getOutputStream();
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35
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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36 String serverUrl = req.getParameter("server");
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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37 String uuid = req.getParameter("uuid");
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38 String type = req.getParameter("type");
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6838e4112eeb Bugfix: the current locale string is used to fetch chart images now.
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39 String locale = req.getParameter("locale");
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40
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41 prepareHeader(req, resp);
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42
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43 Document request = ClientProtocolUtils.newOutCollectionDocument(
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44 uuid, type, type,
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45 ChartServiceHelper.getChartAttributes(prepareChartAttributes(req)));
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46
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47 HttpClient client = new HttpClientImpl(serverUrl, locale);
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48 client.collectionOut(request, uuid, "chart", out);
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49
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50 out.close();
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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51 out.flush();
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52 }
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53 catch (IOException ioe) {
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54 ioe.printStackTrace();
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55 System.err.println(ioe.getMessage());
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
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56 }
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b493d606fdef Enabled the client to request charts in different sizes.
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57 catch (Exception e) {
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58 e.printStackTrace();
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b493d606fdef Enabled the client to request charts in different sizes.
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59 System.err.println(e.getMessage());
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60 }
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61 }
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62
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63
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64 protected Map<String, String> prepareChartAttributes(HttpServletRequest req) {
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65 Map<String, String> attr = new HashMap<String, String>();
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66
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67 Map params = req.getParameterMap();
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68
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69 attr.put("width", req.getParameter("width"));
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70 attr.put("height", req.getParameter("height"));
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71 attr.put("minx", req.getParameter("minx"));
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72 attr.put("maxx", req.getParameter("maxx"));
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73 attr.put("miny", req.getParameter("miny"));
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74 attr.put("maxy", req.getParameter("maxy"));
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75 attr.put("format", req.getParameter("format"));
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76
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77 return attr;
78
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78 }
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80
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81 protected void prepareHeader(
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82 HttpServletRequest req,
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83 HttpServletResponse resp
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84 ) {
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85 String export = req.getParameter("export");
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86
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87 if (export != null && export.equals("true")) {
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88 String format = req.getParameter("format");
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89
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90 if (format == null || format.length() == 0) {
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91 format = "png";
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92 }
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93
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94 String fn = "chart_export" + getFileExtension(format);
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95
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96 resp.setHeader("Content-Disposition", "attachment;filename=" + fn);
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97 resp.setHeader("Content-Type", getMimeType(format));
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98 }
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99 }
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100
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101
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102 protected String getFileExtension(String format) {
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103 if (format.equals("png")) {
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104 return ".png";
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105 }
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106 else if (format.equals("pdf")) {
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107 return ".pdf";
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108 }
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109 else if (format.equals("svg")) {
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110 return ".svg";
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111 }
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112
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113 return ".png";
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parents: 549
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114 }
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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115
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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116
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
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117 protected String getMimeType(String format) {
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118 if (format.equals("png")) {
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119 return "image/png";
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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120 }
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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121 else if (format.equals("pdf")) {
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
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parents: 549
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122 return "application/pdf";
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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123 }
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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124 else if (format.equals("svg")) {
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parents: 549
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125 return "svg+xml";
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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126 }
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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127
51d4b51a51ed Added icons to export chart as PNG, PDF and SVG to the ChartToolbar.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 549
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128 return "image/png";
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parents: 549
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129 }
78
9ca5160cf080 Added a service that builds up requests to retrieve chart images. Use this service to display charts in the ChartOutputTab.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents:
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130 }
280
b493d606fdef Enabled the client to request charts in different sizes.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 254
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131 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
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