Ireport user manual

But most of my knowlege i've get it by testing and trying to see how could i handle it. Again any complaint or something with ireport only 'cuz i havent go with JasperServer or others.

Joined: May 20 - am. Last seen: 14 years 8 months ago. Sorry if post was a bit of a rant. All I want at the moment is the connection string to connect a subreport that is different from that of the main report. The documentation states to use param "MyDatasource" but fails to state what the value should actually be. Have had to drop using iReports for anything slightly complicated until I can sort this out. Hi, I need the e-book. Could you please send to me???

Thank You. Here is my email : hypoo88 hotmail. Regards, Ching. Joined: Nov 26 - pm. Last seen: 14 years 1 month ago. The book is not free. Go to the links in the first post to obtain a copy. BTW it's never a good idea to post your e-mail address on any forum. It's a great way to get in harvisted by spammers. Joined: Mar 19 - am.

Last seen: 14 years 10 months ago. JamieDenman wrote: Sorry if post was a bit of a rant. Connection default value expression: java. Joined: Jul 27 - am. Last seen: 15 years 5 months ago. That's what I wanted and it works fine: can now query as many datbases as required in same report with subreports Shame the manual couldn't have quoted you in its examples.

Now they need to improve subdataset usage and they'll have a reasonable package. Thanks again. I bought the Guide in the hopes that it would give me the information I needed to move beyond the most basic of reports. What I have found is nothing but frustration. The Guide is constantly talking over my head, making the assumption that I already know far more syntax and information than I really do. I am left with searching Google for answers, gleaning samples from unrelated sections of the Guide, and using trial-and-error to just get what I would call "basic" things to work.

For example, the syntax of a comparison is never spelled out in the Guide. The examples I have found allow me to know if something is null or equal, but I'm unable to use greater than or less than the only examples I find are those with math, but I don't want to calculate anything! I think my most favorite frustrating error is "Cannot cast from int to Integer" These are, I am sure, very simplistic questions.

Are there any other resources I can be referred to? An "Idiot's Guide" would be fine as long as it goes far enough to get into the things I don't know, like basic programming syntax for expressions. Thanks for any help! They are highly recommended, especially to new users.

Designing a report Create your first report in a few seconds. Exporting reports How to compile and export reports. Deploying reports How to execute a report in your Java application. Creating a chart Simple tutorial about how to create a chart. Using report parameters Simple tutorial about using report parameters. Using report variables Simple tutorial about using report variables. Creating a custom template This tutorial explains how to create a report to be used as a template for new files.

All you need to know about the subreports. Creating expressions using Groovy How to simplify expressions using Groovy instead of Java. Jaspersoft Support Options.

System It makes no kind of calculation and the expression is not evaluated; in this case, the report engine keeps only in memory the last value set for this variable; it can be used to store the calculation result performed for example using a scriptlet.

Table 7. Reset types The Initial Value Expression is always ignored The variable is initialised only once at the beginning of the report creation by using the Initial Value Expression Page The variable is initialised again in each new page Column The variable is initialised again in each new column or in each page if the report is composed by only one column Group The variable is initialised again in each new group the group we refer to is specified in Reset Group Table 7.

Custom Incrementer Factory Class it is the name of a java class that increases the JRIncrementerFactory interface, useful to define operations such as the sum for non-numerical types; Variable Expression it is the java expression that identifies the input value of the variable to each iteration; Initial Value Expression it is an expression of which evaluation produces the variable initial value.

Built-in variables As for the parameters, JasperReports puts at the user disposal some built-in variables that are directly managed by the reporting engine , they are readable, but not modifiable by the user. These variables are presented in table 7. At Report time this variable will contain the total number of pages It contains the current number of columns Current number of records that have been processed Current number of records that have been processed in the current page Current number of records that have been processed during the current column creation Current number of records that have been processed for the group specified as variable prefix.

In the chapter 4 we explained the report structure, and we have seen how the report is divided in bands, horizontal portions of page that are printed and modified in height according to the band properties and content.

Here we will se how to use the groups, how to create some breaks in the report, how to manage subtotals etc Bands JasperReports divides a report in seven main bands and the background eight bands in total. To these other two bands are added, the group footer and the group header.

Through this window it is possible to modify the main properties of a band, its height, expressed in pixel Band Height , the possibility for the band to be break if it is overflow from the page Split allowed and the Print When Expression, that is an expression the must return a Boolean object and of which valuation determines the print.

In this case the empty expression represents implicitally the expression: Into the expression it is possible to use fields, variables and parameters, by paying attention to produce as a result a Boolean object.

Even if it is specified esplicitly, the band height can increase if one or more elements it contains grows vertically it can happen for textfield elements of which contents exceed the specified dimensions or for the subreports. JasperReports guarantees that the band height is never inferior to that specified. In order to resize a band it is possible to use the bands window figure 8. A double click on the inferior margin allows to resize the band by adapt the height to the content.

If one or more consecutive bands have zero height, it is possible to increase its dimension by keeping press the Shift button and to move towards the bottom the inferior margin in the band that precedes it. By moving an element from a band to an other, the band to which the element is associated, is changed automatically.

Groups The groups allow to group the records of a report in order to create some ruptures. A group is defined through an expression.

JasperReports evaluates this expression: a new group begins when the expression value changes. We will explain the use of the groups through an example created step by step. Suppose to have a list of people: we want to create a report where these peoples names are grouped on the grounds of the initial letter of the name like in a phone book.

Run iReport and open a new empty report. The first thing you have to think to is the order of record selection: JasperReports makes no order of records coming from a datasource; for this reason when you think about a print containing some groups, you have to order the records yourself in a right way. The result should be similar to that of the figure 8.

A group is identified by several properties: Group Name it specifies the group name; the name will be used to name the two bands associate to the group: the header and the footer; Start on a new column if this option is selected, it allows to force a column break at the end of the group that is at the beginning of a new group ;.

Our expression has to return the first letter of the name; an expression like this Added the new group, in the design window two new bands appear: InitialHeader and InitialFooter.

Insert in the InitialHeader band a textfield with the expression used for the group figure 8. Here the final result figure 8. The number of possible groups contained into a report is arbitrary, a group can be contained in a parent group and contain other children groups. The result is a groups list. It is possible to change the priority of a group respect to another group through the Move Up and Move Down buttons present in the groups list frame fig.

To change the priority of a group means also to change the position of the bands composing it. More is the priority, more the group bands are far from the detail band. The subreports represent one of the most advanced functionalities of JasperReports and they make possible the realization of very complex prints. The aim is to be able to insert a report into another report created with modalities similar to the first one. We have seen that to create a print we need three things: a jasper file, a parameters map it can be empty , and a datasource or a JDBC connection.

In this chapter we will explain how to pass these three objects to the subreport through the parent report and by creating dynamic connections that are able to filter the records of the subreport on the grounds of the parents data. Then we will explain what tricks can be adopted to give back to the parent report information regarding the subreport creation. Create a subreport As we have already said, a subreport is a real report composed of its own XML source and compiled in a jasper file.

To create a subreport means to create a normal report. You have to pay attention only to the print margins that usually are set to zero for the subreports.

The horizontal dimension of the report should be as large as the element where it will take place into the parent one. It is not necessary that the subreport element be exactly as large as the subreport, however in order to avoid unexpected results, it is always better to be precise. In the parent report it is possible to insert a subreport using the subreport tool; what is created is an element similar to the rectangle.

The subreport element dimensions are not really meaningful because the subreport will occupy all the necessary space without begin cut or cropped. We can think as if the subreport element only defines the position of the top left corner to which align the subreport. Link of a subreport to the parent report To link the subreport to the parent one means to define three things: how to recover the jasper object that implements the subreport, how to feed it with data and how to set the value for the subreport parameters.

All this information is defined through the subreport properties figure 9. The properties are divided into two tabs: Subreport and Subreport Other. The Parameter Map Expression is probably the method least used to set the values of the subreport parameters, but is the first property of the subreport element encountered in the properties window; it allows you to define an expression of which result has to be a java.

Map object. If you leave this field blank, a void map will be passed to the subreport this is not true if we define some subreport parameter values as well see soon. The limitation of this mechanism is the immutability of the parameters passed in the map. You can see the Subreport parameter table in figure 9. Also in this case the interface is quite selfexplanatory: by using the Add button it is possible to add a new parameter that will feed the parameters map of the subreport.

The parameter name has to be the same as the one declared in the subreport. The names are case sensitive, that means capital and small letters make the difference. If you make an error typing the name, or if the inserted parameter has not been defined, no error is thrown but probably you would ask why something is not working The expression is a classic JasperReports expression where it is possible to use fields, parameters and variables.

The return type has to be congruous to the parameter type declared in the subreport, otherwise there is an exception of ClassCastException at runtime.

One of the most common uses of the subreport parameters is to pass the key of a record printed in the parent report in order to execute a query in the subreport with which you can extract the referred records report headers and lines. To specify the datasource To set the subreport datasource means to tell JasperReports how to retrieve data to fill the subreport.

Using JDBC to fill the report makes the use of the subreport simple enough. In this case the Connection Expression defines a java. Connection object that is already linked to the database. By using a Connection Expression, it is a foregone conclusion that the report will be created starting from the SQL query contained in the subreport. The use of a datasource is more complex: in fact it is a simple set of records and there is not a concept comparable to that of the JDBC connection.

However the use of an expression allows some kind of freedom for the production of the datasource. A datasource is in general a consumable object that is usable for feeding a report only once; so a datasource passed as a parameter will satisfy the needs of only one subreport.

So therefore the parameter technique is not suitable when every record of When we explain the Datasource we will see how this problem is easily solvable by using custom datasources. To specify the subreport To specify what. The type of object returned from this expression has to be selected from the combo box that precedes the expression field see figure 9.

The possible types and their semantic meaning are listed in table 9. Possible return types of the Subreport Expression It represents the jasper file preloaded in a JasperReport object java. InputStream It is an open stream of the jasper file java.

File It is a file object that identifies the jasper file java. String It identifies the name of the jasper file Table 9. If the expression is a string, it uses the JRLoader class to load the file starting from the specified location, in particular the string is at first interpreted as URL, in case of MalformedURLException the string is interpreted as a physical path to a file: if the file does not exist, the string is interpreted as a java resource.

This means that if you refer to a file, the string has to contain the absolute path where it is, or you have to put your jasper files in the classpath and refer to it using a java resource path. A step by step example Lets put into practice what we saw in the previous paragraph. We want to print an orders list with each orders detail rows. Open an empty report. Select the report: button and insert the query for the parent. Press OK button: the three fields will be registered automatically in the report fig.

Drag the three fields into the detail, save the report with a name as you like for example master. In order to correctly read the query fields, it is necessary to associate a default value for the parameter for example the empty string. Save the subreport for example with the name customers. The vertical dimension of this element is not important because during the print creation JasperReports will use all the necessary vertical space 9.

Set the subreport properties by opening the element properties window and move in the Subreport tab. In the Subreport Other tab specify where to find the customer. As expression for the subreport, simply specify the jasper file name to use as subreport. By using iReport, we are sure that the subreport will be found by specifying only its name without an absolute path because the directory where the subreport is stored, will be automatically added to the CLASSPATH and so To do that, add a new line in the parameters table of the subreport by specifying the parameter name of the subreport and its expression that creates the value to give to the parameter.

Compile master. If everything is ok, you should obtain something like that in the figure 9. Proceed with the second subreport to view the detail of the order. Once again start from an empty report, remove the margins, define the parameter linked to the master; in this case the ORDERID parameter declared as java.

Set the height of the not used bands to zero all except for the detail and insert in the detail band the fields we want print fig. The file will be details. You have just to compile again the master and run the final print. The final result should be something like that in the figure 9. Return parameters JasperReports dont provide an explicit mechanism to return parameters from a subreport to the parent at the end of the subreport filling process.

However this functionality could be useful in many situations, for example when you want to print in the parent the total number of records processed in the subreport, or to return the result of a particular elaboration executed in the subreport. It is necessary to think about a trick to avoid both these problems. In reality, the solution is simpler than what you might think: the aim is to use a java.

HashMap parameter to share a memory location between the parent and the subreport. Passing this parameter to the subreport, we will fill the HashMap by putting values we want to give back with predefined map keys.

In this way we do not give a new value to the parameter that is not possible , but we will modify the content of the HashMap, which can be done. You now have to find a way to execute an instruction like this: java. This expression does not produce values. So you have to use an external class that expose a method able to produce the same result of the expression and that returns an arbitrary value. The code of a simple class that can do what we need is the follow: HashMap map.

The class is simple: it exposes only one static method addMapValue that allows to fill a key in a HashMap by producing a value of Boolean return constantly false. To use the proposed method and obtain the desired result, we can add to the report for example in the summary a dummy element i. Do not worry too much about the element type because this will be never printed because addMapValue always returns the boolean value false.

Choosing the right position of the hidden element into the report allows us to choose when and how many times the addMapValue must be executed. The ability to retrieve the data to print from a relational database through a SQL query makes the reports creation extremely simple, because it is possible with a mouse click to register the query fields as report fields without having to specify the name and the type of each single field.

When it is not possible to access data through JDBC or when you do not want JasperReports to interacts directly with the database , it is necessary to use a JRDataSource that means JasperReports Data Source , which is an interface that allows access to data as if they are structured in tables and organized in lines and columns the lines are named records of the datasource and the columns are the record fields.

The program will pass to the fillReport method of JasperReports an opened connection to a database a java. Connection object or the instance of a JRDataSource due to fill the report. In the first case, JasperReports will use the supplied JDBC connection to execute the SQL query specified in the report obviously this query is defined only if you want to print the report by using this method.

The result of the query typically a java. In this way JasperReports associates the data to print with a JRDataSource object, which represents the generic interface used by this library for managing the data to print. In this chapter, we try to clarify the different types of JRDataSource that are at our disposal and how they can be used in iReport. Moreover we will see how to extend JRDataSource; sometimes extending a datasource allows us to exceed some Datasources in iReport iReport allows us to manage and configure different types of datasources to fill the reports.

These datasources are stored in the iReport configuration and activated when needed. Technically a connection and a datasource are different objects the first need always a relational database, but the second represents a simple interface to access data structured in an arbitrary form.

However from now on we will use these two words synonymously. Even if we keep an arbitrary number of datasources ready to use, iReport works always with only one source or connection. To set the active datasource, select from the main window the menu Build Set the active connection and select the desired datasource from the prompted list fig.

If no datasource is selected, it is not possible to fill a report with data. The first thing to do is to name the connection possibly by using a significant name, such as Mysql Test. The combo box proposes the names of all the most common JDBC drivers. Press the Wizard button to create the URL.

Insert username and password to access the database. By means of a checkbox it is possible to save the password for the connection. If the password is empty, it is better if you ask to save it. Once you have inserted all the data, it is possible to verify the connection by pressing the Test button. If everything is ok, the following dialog window will appear:.

At the end of the test, remember to set the created connection as active connection to use it. In general the test can fail for a lot of reasons, the most frequent are: - ClassNotFoundException - URL not correct - Parameters not correct for the connection Database not found, user or password wrong, etc For example, suppose we wish to create a connection to an Oracle database.

In reality, by testing the connection, the program will throw the ClassNotFoundException. As iReport uses its own Class Loader, it will be enough to copy into the iReport lib directory the file classes The lib directory is the right place to insert jar archives with jar or zip extension. If the driver is not in jar version, but it is shipped as an uncompressed directory for example a com directory containing the hierarchy of all driver classes , the most correct place to dynamically add those classes to the CLASSPATH is to copy the driver directory into the classes directory present in the home of iReport.

In reality a StackOverflowError exception is thrown the stack trace is printed on the standard error on the console or the shell from which iReport was started.

Parameters not correct for the connection The less problematic error case is that where you try to establish a connection to a database with the wrong parameters username or password not valid, database specified nonexistent, etc In this case the same database will give back a message; it will be more or less explicit about the failure of the connection. This connection can be also used by a subreport or, for example, by a personalized lookup function for the decoding of a particular data.

Connection class passed to JasperReports from the calling program. The details about how to create a SQL query are explained in the chapter Fields registration In order to be able to use the SQL query fields in the report, it is necessary to register them it is not necessary to register all the selected fields, those For each field it is necessary to specify name and type.

The following table shows the mapping of the SQL types to the corresponding java types. Date TIME java. Timestamp Table These types cannot be managed automatically by JasperReports however it is possible to use them by declaring them generically as Object and by managing them by writing support static methods.

For the automatic registration of SQL query fields iReport uses a mapping a little bit more simplified than that proposed in the table. The JRDataSource interface Before proceeding with the exploration of the different datasources put at your disposal by iReport, it is necessary to understand how the JRDataSource interface works.

The next method returns true if the cursor is positioned correctly to the subsequent record, false if there are no available records. Every time that JasperReports executes a next, all the fields declared in the report are filled and all the expressions starting from those associated with the variables are calculated again; subsequently it will be decided if to print the header of a new group, to go to a new page, etc When next returns false, the report is ended by printing all final bands group footer, column footer, last page footer and the summary.

The next method can be called as many times as there are records present or represented from the datasource instance. The method getFieldValue is called by JasperReports after a call to next with a true result. In particular, getFieldValue is executed for every single field declared in the report see chapter 7 for the details about how to declare a report field.

In the call a JRField object is passed as a parameter; in it is the name of the field of which you want to obtain the value, the type of java object that you expect is given back by the call and the field description used sometimes to specify information useful at the datasource to extract the field value. The type of return value of the getFieldValue method has to be adequate to that declared in the JRField parameter, except for when a null is returned. The possible types of return values are: java.

Object, java. Boolean, java. Byte, java. Date, java. Timestamp, java. Time, java. Double, java. Float, java. Integer, java. InputStream, java. Long, java. Short, java. BigDecimal, java. If java. Object is requested as a type of return, the method can return an arbitrary type. This is the case where a datasource is not composed of lots of single typed fields as so happens for the records of a database , but by only one field represented from a java object and used in the expressions through a cast: in the chapter 7 a it.

Person field had been presented as example; it was used with the syntax: it. JavaBean set datasource This datasource allows us to use some JavaBeans as data to fill a report. In order to create a connection of this type, select from the first combo box of the window of a datasource creation fig. Once again the first thing to do is to specify the name of the new datasource.

The JavaBean set datasource uses an external class named Factory to produce some objects the JavaBean that constitute the data to pass to the report. Enter your java class of which complete name will be specified in the Factory class field that has a static method to instantiate different JavaBeans and to return them as a collection java.

Collection or an array Object[]. The method name and the return type have to be specified in the other fields of the window. Lets see how to write this Factory class. Suppose that your data are represented by Person objects; following is the code of this class, that shows two fields: name the person s name and age. Vector ; collection. Your datasource will represent five JavaBeans of Person type. This means that if the JavaBean has a getXyz method, so xyz is a record field that is composed by the bean.

In our example, the Person object shows two fields: name and age; register them in the fields list respectively String and Integer. Create a new empty report, open the values window and add the two fields. Move the fields into the detail and run the report. In figure The previous versions to the 0. Because of the greater flexibility of the version applied with JasperReports, the old implementation has been left.

A XML document is typically a tree structure that need not necessarily be a table. For this reason it is necessary to make the datasource know how and what nodes of the XML documents have to be selected and presented as record. Some examples will be useful to help to know how to define the nodes selection. Consider the XML file that is in table It is a hypothetical address book where different persons appear; they are grouped in categories.

At the end of the categories list a second list of the favourites objects appear. In this case it is possible to define different node set types. The choice should have to be always determined from how you want to organize the data in the report.

Here we propose a little bit more complex expression than the last example in order to see the Xpath power of expressiveness: the idea is that to select the person nodes belonging to the work category.

The expression to use is the following. Once you have learned how to create an expression for the selection of a node set, proceed to the creation of a XML datasource. Open the window for the creation of a new datasource and select the XML File datasource connection. Besides the datasource name, the only information to insert is the XML file name to elaborate and the XPath expression for the nodes selection. Registration of the fields In the case of a XML datasource, the definition of a field in the report needs, besides the type and the name, a particular expression inserted as a field description.

As the datasource aims always to one node of the selected node set, the expressions are relative to the present node. Now, lets see everything in action. Prepare a simple report with the registered fields as in table Position the different fields into the detail band as in figure The XML file used to fill the report is that shown in table XML datasource and subreport A node set allows you to identify a series of nodes that represent, from a JRDataSource point of view, some records.

However, when the XML document is very complex, it may be necessary to see other node sets that are in the main nodes. Take into consideration the following XML, that is a little bit modified version of the document presented in table What we want to produce is a document more elaborate than those we have seen until now: of each person we will view the e-mail addresses list and the hobbies. To obtain such a document it is necessary to use the subreports, in particular you will need a subreport for the e-mail addresses list, one for the hobbies and one for the favourite people.

What most interests us is to understand how to produce the new datasources to feed the subreport. The difference between the two is that the former values the expression of nodes selection referring to the document root node, the latter values this expression starting from the selected node. Both methods are used in the DataSource Expression of the subreport element to produce dynamically the datasource to pass to the subreport.

The most important thing is that this mechanism allows us to make the datasource production, but also the expression of the nodes selection dynamic. In our case, the expression to create the datasource that will feed the subreport of the e-mail addresses will be: net. The expression for the hobbies will be equal, except for the way of the nodes selection: net. The report master fields are declared as in table In the subreport we have to refer to the present node value, so the fields expression will be simply a point.

In the master report, addressbook. Doing that, the name of the different people will be grouped for category like it happens in the XML file. Lower, the two subreports are located, the former for the hobby, the latter for the e-mail addresses. The email and hobby subreports are identical between them, except for the expression of the only one field present in these subreports and the declaration of the field to print.

The two reports are as large as the subreport element in the master report, the margins have been reduced to zero. Compile and execute If everything is ok, we will obtain the print shown in figure The real powerful of the XML datasource is given by the XPath versatility that allows navigating the nodes selection in a refined manner.

The only information to specify, besides the name to give to this datasource, is the CSV file from which to take the data. The implementation of this datasource is really simple, so we will use it as example in the next paragraph where we will see how to implement a datasource. However this ease reflects the scarce adhesion to the CSV specifics: in fact the datasource does not support multi-line records, does not manage the apices and the sequences of escape, and it assumes that the character of separation of the different fields is the ; character.

Independently from all its limits, this datasource is extremely useful both from the didactic point of view and to quickly make tests in absence of a database to that you can ask with a query. It is the datasource used to create a report when the button is pressed. The prerogative of this source is that to return true to the next method for a number of record for default only one , and to return always null to every call of the getFieldValue method.

It is like to have some records without fields, that is an empty datasource. In these cases it is possible to write autonomously a new JRDataSource. This operation is not complex: in fact all that you have to do is to create a class that implements the JRDataSource interface table Package net. The next method is useful to move the records represented by the datasource.

It has to return true if a new record to elaborate exists, false in the contrary case. If the next method has been called positively, the getFieldValue method has to return the value of the requested field or null if the requested value is not findable or it does not exist. In particular the requested field name is contained in the JRField object passed as parameter.

Also JRField is an interface through which it is possible to get the three information associated to a field: the name, the description, and the java type that represents it we have listed these three types in the paragraph about the JRDataSource of this chapter.

Now we will proceed to write our personalized datasource. The idea is a little bit original, you have to write a datasource that explores the directory of a filesystem and returns the found objects file or directory. There will be two constructors for our datasource: the former will receive as a parameter the directory to scan, the latter will not have parameters and will use the present directory to scan.

Just instantiated, the datasource will look for the file and the directory present in the indicated way, filled the array files. The next method will increase the index variable that we will use to keep a trace of the position reached into the array files and it will return true until we reach the end of the array. The getFieldValue method will return the file requested information.

In the following paragraph we will explain how to use our datasource in iReport and we will test it. In fact all these are managed automatically by iReport.

For all the other datasources, a special connection is put at your disposal; it is useful to use whatever JRDataSource by using a sort of driver that instantiates the JRDataSource specific that you want to use.

These drivers are simple java classes that have the aim to test a datasource or to feed the report as if this is executed by a particular program. The idea that is behind this kind of driver is the same we have seen for the JavaBean set datasource: it is necessary to write a java class that through a static method creates the datasource and returns it. For example if you want to test the JRFileSystemDataSource we have examined in the previous paragraph, it will be necessary to create a simple class like that shown in table This class, and in particular the static method that will be called, will execute all the necessary code for instancing correctly the datasource.

Now that we have defined the way to obtain a JRDataSource, prepared and ready to be used, create the connection through which it will be used. Prepare a new report with the fields managed by the datasource. No method to find the fields managed by a datasource exists. Once you have created the fields, insert in the report detail and run the print.

The report has been divided in two columns, in the band of the column header the File name and Size tags have been inserted. Then two laid on images have been inserted, one representing a document, the other an open folder.

The image However it can happen to have more complex classes, it is the case where the datasource is obtained by calling an Enterprise Java Bean, or for example by calling WebService The difference between the two is that this datasource is able to move to fields present in subclasses, so that it is possible, for example, to print the Street field of an hypothetical bean Address contained in the bean Person.

The figure The selected attributes can be registered as fields. For example a description Address. Street suggests to the datasource to find the date by effectuating the calls getAddress. This builder has been thought of for the expression to use for feeling a subreport. Suppose that the Person object has a getHobbies method of which return type was a carrier of Hobby objects, the necessary expression to feed the subreport where to print the hobby should be: new JRExtendedBeanDataSource java.

JasperReports 0. Internationalizing a report means making all static text set at design time like labels, messages, etc The text translations in the different languages supported by the report are stored in particular resource files named Resorurce Bundle. In this chapter we are dealing moreover with the built-in function msg and how its possible to localize very complex sentences created dynamically.

Resource Bundle Base Name When a report is internationalized, its necessary to locate all locale dependent text, like labels and static strings.