gitorious.org Git - online-glom:gwt-glom.git/blob - src/main/java/org/glom/web/server/ReportGenerator.java

1 /*

3 *

4 * This file is part of GWT-Glom.

5 *

6 * GWT-Glom is free software: you can redistribute it and/or modify it

7 * under the terms of the GNU Lesser General Public License as published by the

8 * Free Software Foundation, either version 3 of the License, or (at your

9 * option) any later version.

10 *

11 * GWT-Glom is distributed in the hope that it will be useful, but WITHOUT

12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License

14 * for more details.

15 *

16 * You should have received a copy of the GNU Lesser General Public License

17 * along with GWT-Glom. If not, see <http://www.gnu.org/licenses/>.

18 */

19

20 package org.glom.web.server;

21

22 import java.io.ByteArrayOutputStream;

23 import java.sql.Connection;

24 import java.util.HashMap;

25

26 import net.sf.jasperreports.engine.JRException;

27 import net.sf.jasperreports.engine.JasperCompileManager;

28 import net.sf.jasperreports.engine.JasperFillManager;

29 import net.sf.jasperreports.engine.JasperPrint;

30 import net.sf.jasperreports.engine.JasperReport;

31 import net.sf.jasperreports.engine.design.JRDesignBand;

32 import net.sf.jasperreports.engine.design.JRDesignExpression;

33 import net.sf.jasperreports.engine.design.JRDesignField;

34 import net.sf.jasperreports.engine.design.JRDesignQuery;

35 import net.sf.jasperreports.engine.design.JRDesignSection;

36 import net.sf.jasperreports.engine.design.JRDesignStaticText;

37 import net.sf.jasperreports.engine.design.JRDesignTextField;

38 import net.sf.jasperreports.engine.design.JasperDesign;

39 import net.sf.jasperreports.engine.export.JRHtmlExporterParameter;

40 import net.sf.jasperreports.engine.export.JRXhtmlExporter;

41

42 import org.apache.commons.lang.StringUtils;

43 import org.glom.libglom.Document;

44 import org.glom.libglom.Glom;

45 import org.glom.libglom.LayoutFieldVector;

46 import org.glom.libglom.LayoutGroup;

47 import org.glom.libglom.LayoutItemVector;

48 import org.glom.libglom.LayoutItem_Field;

49 import org.glom.libglom.Relationship;

50 import org.glom.libglom.SortClause;

51 import org.glom.libglom.SqlBuilder;

52 import org.glom.libglom.SqlExpr;

53 import org.glom.libglom.Value;

54

55 /**

56 * @author Murray Cumming <murrayc@openimus.com>

57 *

58 */

59 public class ReportGenerator {

60

61 final int height = 30;

62 LayoutFieldVector fieldsToGet = new LayoutFieldVector();

63

64 /**

65 * @param tableName

66 * @param reportName

67 * @param configuredDoc

68 * @param layout_group

69 * @return

70 */

71 public String generateReport(final Document document, final String tableName, final String reportName,

72 final Connection connection, final org.glom.libglom.LayoutGroup layout_group) {

73

74 final JasperDesign design = new JasperDesign();

75 design.setName(reportName); // TODO: Actually, we want the title.

76

77 final JRDesignBand titleBand = new JRDesignBand();

78 titleBand.setHeight(height);

79 final JRDesignStaticText staticTitle = new JRDesignStaticText();

80 staticTitle.setText("debug: test report title text");

81 titleBand.addElement(staticTitle);

82 design.setTitle(titleBand);

83

84 final JRDesignBand detailBand = new JRDesignBand();

85 detailBand.setHeight(height + 20);

86

87 fieldsToGet = new LayoutFieldVector();

88 final int x = 0;

89 addToReport(layout_group, design, detailBand, x);

90

91 ((JRDesignSection) design.getDetailSection()).addBand(detailBand);

92

93 // Later versions of libglom actually return an empty SqlExpr when quickFindValue is empty,

94 // but let's be sure:

95 final String quickFind = ""; // TODO

96 final SortClause sortClause = new SortClause(); // TODO

97 SqlExpr whereClause;

98 if (StringUtils.isEmpty(quickFind)) {

99 whereClause = new SqlExpr();

100 } else {

101 final Value quickFindValue = new Value(quickFind);

102 whereClause = Glom.get_find_where_clause_quick(document, tableName, quickFindValue);

103 }

104

105 final Relationship extraJoin = new Relationship(); // Ignored.

106 final SqlBuilder builder = Glom.build_sql_select_with_where_clause(tableName, fieldsToGet, whereClause,

107 extraJoin, sortClause);

108 final String sqlQuery = Glom.sqlbuilder_get_full_query(builder);

109

110 final JRDesignQuery query = new JRDesignQuery();

111 query.setText(sqlQuery); // TODO: quickfind and sort clause.

112 design.setQuery(query);

113

114 JasperReport report;

115 try {

116 report = JasperCompileManager.compileReport(design);

117 } catch (final JRException ex) {

118 ex.printStackTrace();

119 return "Failed to Generate HTML: compileReport() failed.";

120 }

121

122 JasperPrint print;

123 try {

124 final HashMap<String, Object> parameters = new HashMap<String, Object>();

125 parameters.put("ReportTitle", reportName); // TODO: Use the title, not the name.

126 print = JasperFillManager.fillReport(report, parameters, connection);

127 } catch (final JRException ex) {

128 ex.printStackTrace();

129 return "Failed to Generate HTML: fillReport() failed.";

130 }

131

132 final ByteArrayOutputStream output = new ByteArrayOutputStream();

133

134 // We use this because there is no JasperExportManager.exportReportToHtmlStream() method.

135 // JasperExportManager.exportReportToXmlStream(print, output);

136 try {

137 final JRXhtmlExporter exporter = new JRXhtmlExporter();

138 exporter.setParameter(JRHtmlExporterParameter.JASPER_PRINT, print);

139 exporter.setParameter(JRHtmlExporterParameter.OUTPUT_STREAM, output);

140

141 // Use points instead of pixels for sizes, because pixels are silly

142 // in HTML:

143 exporter.setParameter(JRHtmlExporterParameter.SIZE_UNIT, "pt");

144

145 exporter.exportReport();

146 } catch (final JRException ex) {

147 ex.printStackTrace();

148 return "Failed to Generate HTML: exportReport() failed.";

149 }

150

151 // System.out.print(output.toString() + "\n");

152 return output.toString();

153 }

154

155 /**

156 * @param layout_group

157 * @param design

158 * @param height

159 * @param detailBand

160 * @param x

161 */

162 private int addToReport(final org.glom.libglom.LayoutGroup layout_group, final JasperDesign design,

163 final JRDesignBand detailBand, int x) {

164 final LayoutItemVector layoutItemsVec = layout_group.get_items();

165 final int numItems = Utils.safeLongToInt(layoutItemsVec.size());

166 for (int i = 0; i < numItems; i++) {

167 final org.glom.libglom.LayoutItem libglomLayoutItem = layoutItemsVec.get(i);

168

169 final LayoutGroup libglomLayoutGroup = LayoutGroup.cast_dynamic(libglomLayoutItem);

170 final LayoutItem_Field libglomLayoutItemField = LayoutItem_Field.cast_dynamic(libglomLayoutItem);

171 if (libglomLayoutItemField != null) {

172 fieldsToGet.add(libglomLayoutItemField);

173

174 final String fieldName = libglomLayoutItemField.get_name();

175 // System.out.print("fieldName=" + fieldName + "\n");

176

177 // Tell the JasperDesign about the database field that will be in the SQL query,

178 // specified later:

179 final JRDesignField field = new JRDesignField();

180 field.setName(fieldName); // TODO: Related fields.

181

182 // Choose a suitable java class type for the SQL field:

183 Class<?> klass = null;

184 switch (libglomLayoutItemField.get_glom_type()) {

185 case TYPE_TEXT:

186 klass = java.lang.String.class;

187 break;

188 case TYPE_BOOLEAN:

189 klass = java.lang.Boolean.class;

190 break;

191 case TYPE_NUMERIC:

192 klass = java.lang.Double.class;

193 break;

194 case TYPE_DATE:

195 klass = java.util.Date.class;

196 break;

197 case TYPE_TIME:

198 klass = java.sql.Time.class;

199 break;

200 case TYPE_IMAGE:

201 klass = java.sql.Blob.class; // TODO: This does not work.

202 break;

203 }

204 field.setValueClass(klass);

205

206 try {

207 design.addField(field);

208 } catch (final JRException e2) {

209 // TODO Auto-generated catch block

210 e2.printStackTrace();

211 }

212

213 // Tell the JasperDesign to show an instance of the field:

214 final JRDesignTextField textField = new JRDesignTextField();

215

216 // Make sure this field starts at the right of the previous field,

217 // because JasperReports uses absolute positioning.

218 textField.setY(0);

219 textField.setX(x);

220

221 // An arbitrary width, because we must specify _some_ width:

222 final int width = 100; // Points, as specified later.

223 textField.setWidth(width); // No data will be shown without this.

224 x += width;

225

226 // This only stretches vertically, but that is better than

227 // nothing.

228 textField.setStretchWithOverflow(true);

229 textField.setHeight(height); // We must specify _some_ height.

230

231 // TODO: Where is this format documented?

232 final JRDesignExpression expression = new JRDesignExpression();

233 expression.setText("$F{" + fieldName + "}");

234

235 textField.setExpression(expression);

236 detailBand.addElement(textField);

237 } else if (libglomLayoutGroup != null) {

238 // Recurse into sub-groups:

239 x = addToReport(libglomLayoutGroup, design, detailBand, x);

240 }

241 }

242

243 return x;

244 }

245 }