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iReport Ultimate Guide Code Example 3-1 A simple JRMXL file example, continued During compilation of the JRXML file (using some JasperReports classes), the XML is parsed and loaded in a JasperDesign object, which is a rich data structure that allows you to represent the exact XML contents in memory. Without going into details, regardless of which language is used for expressions inside the JRXML, JasperReports creates a special Java class that represents the whole report. The report is then compiled, instanced and serialized in a JASPER file, ready for loading at any time. JasperReports’s speedy operation is due to all of a report’s formulas being compiled into Java-native bytecode and the report structure being verified during compilation instead of run time. The JASPER file does not contain extraneous resources, such as images used in the report, resource bundles to run the report in different languages, or extra scriptlets and external style definitions. All these resources must be provided by the host application and located at run time. 36
3.3 Data Sources and Print Formats Basic Notions of JasperReports Without a means of supplying content from a dynamic data source, even the most sophisticated and appealing report would be useless. JasperReports allows you to specify fill data for the output report in two ways: parameters and data sources. Either kinds of data are presented by means of a generic interface named JRDataSource, as shown in Figure 3-1. Figure 3-1 Data source and parameter Flows for Report Creation Chapter Chapter 11, “Data Sources and Query Executers,” on page 171 is dedicated to data sources; it explains how they can be used in iReport and how it is possible to define custom data sources (in case those supplied with JasperReports are not right for your requirements). JRDataSource allows a set of records that are organized in tables (rows and columns) to be read. It enables JasperReports to fill a report with data from an explicit data source, using a JDBC connection (already instanced and opened) to whichever relational database you want to run a SQL query on (which is specified in the report). If the data (passed through a data source) don't meet the requirements of the user, that is, when it is necessary to specify particular values to condition the report’s execution, it is possible to produce name/value pairs to “transmit” to the print engine. These pairs are named parameters, and they have to be “preventively declared” in the report. Through fillManager, it is possible to join a JASPER file and a data source in a JasperPrint object. This object is a meta-print that can create a real print after you have exported it in the desired format through appropriate classes that implement the JRExporter interface. JasperReports puts at your disposal different pre-defined exporters, such as those for creating files in such formats as PDF, XLS, CVS, XML, RTF, ODF, text, HTML and SWF. Through the JRViewer class, you can view the print directly on the screen and print a hardcopy. 3.4 Compatibility Between Versions When a new version of JasperReports is distributed, some classes usually change. These modified classes typically impact the XML syntax and the JASPER file structure. Before JasperReports 1.1.0, this was a serious problem and a major upgrade deterrent, since it required recompiling all the JRXML files in order to be used with the new library version. Things changed after the release of Version 1.1.0, after which JasperReports assured backwards compatibility, that is, the library is able to understand and execute any JASPER file generated with a previous version of JasperReports. 37
Page 1 and 2: UNIFIED REPORTER iREPORT ULTIMATE G
Page 3 and 4: Table of Contents TABLE OF CONTENTS
Page 5 and 6: Table of Contents 6.1.2 Accessing t
Page 7 and 8: Table of Contents Chapter 13 Flash
Page 9 and 10: Introduction CHAPTER 1 INTRODUCTION
Page 11 and 12: Introduction To open the License Ma
Page 13 and 14: Getting Started CHAPTER 2 GETTING S
Page 15 and 16: Getting Started Figure 2-1 NetBeans
Page 17 and 18: Getting Started 2.6 The Windows Ins
Page 19 and 20: Getting Started 2.7 Installing iRep
Page 21 and 22: Getting Started Figure 2-8 Options
Page 23 and 24: Getting Started Figure 2-10 JDBC Co
Page 25 and 26: Getting Started The Data Sources dr
Page 27 and 28: Getting Started 3. In the third ste
Page 29 and 30: Getting Started Figure 2-18 Report
Page 31 and 32: Basic Notions of JasperReports CHAP
Page 33 and 34: Basic Notions of JasperReports Code
Page 35: Basic Notions of JasperReports Code
Page 39 and 40: Basic Notions of JasperReports java
Page 41 and 42: Basic Notions of JasperReports of a
Page 43 and 44: Basic Notions of JasperReports (new
Page 45 and 46: Report Structure CHAPTER 4 REPORT S
Page 47 and 48: Report Structure Group Header Detai
Page 49 and 50: Report Structure The page margin di
Page 51 and 52: Report Structure Figure 4-6 Result
Page 53 and 54: Report Structure Multiple columns a
Page 55 and 56: Report Structure Figure 4-11 Proper
Page 57 and 58: Report Structure As you can see in
Page 59 and 60: Report Structure 4.1.3.12 Imports T
Page 61 and 62: Report Structure example, in a repo
Page 63 and 64: Report Elements CHAPTER 5 REPORT EL
Page 65 and 66: Report Elements Figure 5-3 Guidelin
Page 67 and 68: Report Elements Figure 5-6 Element
Page 69 and 70: Report Elements Table 5-1 Formattin
Page 71 and 72: Report Elements Figure 5-10 Table 5
Page 73 and 74: Report Elements Figure 5-11 Custom
Page 75 and 76: Report Elements 5.1.5.2 Rectangle T
Page 77 and 78: Report Elements Table 5-4 Type Imag
Page 79 and 80: Report Elements Table 5-5 Option Im
Page 81 and 82: Report Elements Code Example 5-1 Dy
Page 83 and 84: Report Elements Code Example 5-2 Pr
Page 85 and 86: Report Elements PDF font name PDF e
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Report Elements For your convenienc
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Report Elements Here there are some
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Report Elements The following brief
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5.5 Adding Custom Components and Ge
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Fields, Parameters, and Variables C
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Fields, Parameters, and Variables I
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6.1.2 Accessing the SQL Query Desig
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Fields, Parameters, and Variables 6
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6.2.3 Built-in Parameters Fields, P
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Fields, Parameters, and Variables R
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Fields, Parameters, and Variables 6
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Fields, Parameters, and Variables T
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Bands and Groups CHAPTER 7 BANDS AN
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Bands and Groups expression may be
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Bands and Groups Figure 7-6 Draggin
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Bands and Groups Figure 7-10 The fi
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Bands and Groups Figure 7-14 shows
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7.3 Other Group Options Bands and G
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Fonts and Styles CHAPTER 8 FONTS AN
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Fonts and Styles The list of availa
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Fonts and Styles Figure 8-5 Font Ex
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Fonts and Styles Figure 8-7 Font Ex
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Fonts and Styles Figure 8-10 The ne
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Fonts and Styles To apply a style t
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Fonts and Styles Figure 8-17 The ou
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Templates CHAPTER 9 TEMPLATES One o
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Templates Figure 9-2 Columnar repor
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Templates Figure 9-4 Group by step
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Templates If a static text element
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Templates Figure 9-8 Your custom te
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Templates Figure 9-10 New template
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Templates Figure 9-12 Preview of re
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Subreports CHAPTER 10 SUBREPORTS Su
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Subreports Figure 10-3 Subreport el
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Subreports Figure 10-4 Subreport Pa
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Subreports Figure 10-7 Just a list
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Subreports Figure 10-11 Subreport W
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Subreports Figure 10-14 The final r
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Subreports 3. Click the Add button
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Subreports 10.4 Using the Subreport
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Subreports Figure 10-21 Subreport c
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Subreports Figure 10-23 Setting Sub
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Data Sources and Query Executers CH
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Data Sources and Query Executers
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Data Sources and Query Executers Fi
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Data Sources and Query Executers Af
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Data Sources and Query Executers In
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Data Sources and Query Executers pu
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Data Sources and Query Executers be
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Data Sources and Query Executers Wh
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Data Sources and Query Executers Co
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Data Sources and Query Executers Pr
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Data Sources and Query Executers sp
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Data Sources and Query Executers of
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Data Sources and Query Executers Th
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Data Sources and Query Executers Co
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Data Sources and Query Executers If
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Charts CHAPTER 12 CHARTS JasperRepo
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Charts Figure 12-3 Chart selection
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Charts Figure 12-6 Dataset configur
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Charts settings). These four fields
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Charts Figure 12-10 Chart Theme Des
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Charts Figure 12-12 Example chart t
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Run your report. iReport should dis
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Charts 1. First create a report. Fi
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Charts 4. Right-click on the chart
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Flash Charts CHAPTER 13 FLASH CHART
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Flash Charts The layout properties
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Flash Charts The following figure s
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Flash Charts Table 13-2 Entity IDs
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Flash Charts Table 13-3 Entity expr
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Flash Charts Figure 13-10 Specifyin
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Flash Charts Figure 13-12 Bar chart
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Flash Charts Figure 13-16 The Chart
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Flash Charts Figure 13-19 Advanced
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Flash Charts Figure 13-22 Entering
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Flash Charts Spark Line Spark Colum
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Flash Charts Figure 13-32 Common op
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Flash Charts Figure 13-35 Output of
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Flash Charts Figure 13-39 Output of
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Flash Charts Figure 13-43 Example o
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Lists, Tables, and Barcodes CHAPTER
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Lists, Tables, and Barcodes For you
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Lists, Tables, and Barcodes identif
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Lists, Tables, and Barcodes List el
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14.2 Tables Lists, Tables, and Barc
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Lists, Tables, and Barcodes iReport
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Lists, Tables, and Barcodes Figure
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Lists, Tables, and Barcodes Similar
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Lists, Tables, and Barcodes When us
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Subdatasets CHAPTER 15 SUBDATASETS
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Subdatasets JasperReports permits y
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Subdatasets Figure 15-7 Initial lay
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Subdatasets Figure 15-11 Pie datase
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Crosstabs CHAPTER 16 CROSSTABS A cr
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Crosstabs Using the Crosstab Wizard
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Crosstabs Figure 16-6 Outline tree
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Crosstabs Figure 16-8 Adding a Row
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Crosstabs Figure 16-11 Empty row to
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Crosstabs Figure 16-16 Crosstab Pro
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Crosstabs Figure 16-19 Crosstab Dat
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Crosstabs Figure 16-22 The result o
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Internationalization CHAPTER 17 INT
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Internationalization Figure 17-2 Cr
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Internationalization Figure 17-6 Ne
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Internationalization Figure 17-7 Lo
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Scriptlets CHAPTER 18 SCRIPTLETS A
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Scriptlets Table 18-1 Report events
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Scriptlets Figure 18-3 Adding a Jar
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Scriptlets Figure 18-5 Build output
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Scriptlets If you want to add more
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Scriptlets This is what you get in
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Scriptlets terminates the report ex
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Additional Tools CHAPTER 19 ADDITIO
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Additional Tools Figure 19-3 Date a
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Additional Tools Figure 19-4 Percen
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19.5 How to Run the Samples Additio
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Chart Theme Example APPENDIX A CHAR
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Chart Theme Example Code Example A-
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Index INDEX A Add selected field(s)
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Index components 241 embedded in Ja
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Index scriptlets 53 sheets. See pro
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