net.sf.jasperreports.engine

Class JasperCompileManager

java.lang.Object

net.sf.jasperreports.engine.JasperCompileManager

public final class JasperCompileManager
extends Object

Facade class for compiling report designs into the ready-to-fill form and for getting the XML representation of report design objects for storage or network transfer.

This class exposes all the library's report compilation functionality. It has various methods that allow the users to compile JRXML report templates found in files on disk or that come from input streams. It also lets people compile in-memory report templates by directly passing a JasperDesign object and receiving the corresponding JasperReport object.

Other utility methods include report template verification and JRXML report template generation for in-memory constructed JasperDesign class instances. These instances are especially useful in GUI tools that simplify report design work.

The facade class relies on the report template language to determine an appropriate report compiler. The report compilation facade first reads a configuration property called net.sf.jasperreports.compiler.<language> to determine whether a compiler implementation has been configured for the specific report language. If such a property is found, its value is used as compiler implementation class name and the facade instantiates a compiler object and delegates the report compilation to it. By default, JasperReports includes configuration properties that map the Groovy, JavaScript and BeanShell report compilers to the groovy, javascript and bsh report languages, respectively.

If the report uses Java as language and no specific compiler has been set for this language, the report compilation facade employs a built-in fall back mechanism that picks the best Java-based report compiler available in the environment in which the report compilation process takes place.

The facade first reads the configuration property called net.sf.jasperreports.compiler.class to allow users to override its built-in compiler-detection logic by providing the name of the report compiler implementation to use directly.

If the property is not provided, the facade first tries to see if the JDT compiler from the Eclipse Foundation is available in the application's classpath. If it is, the JRJdtCompiler implementation is used.

If the JDT compiler is not available, the compilation facade then tries to locate the JDK 1.3-compatible Java compiler from Sun Microsystems. This is normally found in the tools.jar file that comes with the JDK installation.

If all these fail, the last thing the fall back mechanism does is to try to launch the javac.exe program from the command line in order to compile the temporarily generated Java source file on the fly.

Configuration Properties to Customize Report Compilation

JasperReports offers various mechanisms for letting users customize its behavior. One of these mechanisms is a complete set of configuration properties. The following list contains all the configuration properties that customize report compilation.

net.sf.jasperreports.compiler.<language>

Such properties are used for indicating the name of the class that implements the JRCompiler interface to be instantiated by the engine for a specific report language when the default compilation is used through this facade class. The value for such a configuration property can be the name of one of the built-in implementations of this interface shipped with the library as listed previously, or the name of a custom-made implementing class.
One can configure report compilers for custom report languages and override the default compiler mappings by setting JasperReports properties of the form net.sf.jasperreports.compiler.<language> to the desired compiler implementation class names. In particular, the mechanism that automatically chooses a Java report compiler can be superseded by explicitly setting the net.sf.jasperreports.compiler.java property to the name of one of the built-in Java compiler classes or of a custom compiler implementation class.
Note that the classes implementing the JRCompiler interface can also be used directly in the programs without having to call them through this facade class.

net.sf.jasperreports.compiler.xml.validation

The XML validation, which is on by default, can be turned off by setting this configuration property to false. When turned off, the XML parser no longer validates the supplied JRXML against its associated XSD. This might prove useful in some environments, although it is not recommended.

net.sf.jasperreports.compiler.classpath

This property supplies the classpath. JDK-based compilers require that the classpath be supplied as a parameter. They cannot use the current JVM classpath. The supplied classpath resolves class references inside the Java code they are compiling.
This property is not used by the JDT-based report compiler, which simply uses the parent application's classpath during Java source file compilation.

net.sf.jasperreports.compiler.temp.dir

The temporary location for the files generated on the fly is by default the current working directory. It can be changed by supplying a value to this configuration property. This is used by the JDT-based compiler only when it is requested that a copy of the on-the-fly generated Java class be kept for debugging purposes as specified by the next configuration property, because normally this report compiler does not work with files on disk.

net.sf.jasperreports.compiler.keep.java.file

Sometimes, for debugging purposes, it is useful to have the generated *.java file or generated script in order to fix compilation problems related to report expressions. By default, the engine deletes this file after report compilation, along with its corresponding *.class file. To keep it, however, set this configuration property to true.

JDT Compiler-Specific Configuration Properties

The JRJdtCompiler report compiler can use special JasperReports configuration properties to configure the underlying JDT Java compiler. This report compiler collects all the JasperReports configuration properties (the ones usually set in the jasperreports.properties file) that start with the org.eclipse.jdt.core. prefix and passes them to the JDT Java compiler when compiling the generated Java class to evaluate report expressions.

One of the uses of this mechanism is to instruct the JDT compiler to observe Java 1.5 code compatibility. To do so, the following properties should be set:

• org.eclipse.jdt.core.compiler.source=1.5
• org.eclipse.jdt.core.compiler.compliance=1.5
• org.eclipse.jdt.core.compiler.codegen.TargetPlatform=1.5

Author:

Teodor Danciu (teodord@users.sourceforge.net)

See Also:

JasperReport, JasperDesign, JRCompiler, JRJdtCompiler, JRVerifier, JRXmlLoader, JRXmlWriter, JRLoader, JRSaver

Field Summary

Fields

Modifier and Type	Field and Description
static String	EXCEPTION_MESSAGE_KEY_INSTANTIATE_REPORT_COMPILER_FAILURE
static String	EXCEPTION_MESSAGE_KEY_REPORT_COMPILER_CLASS_NOT_FOUND
static String	EXCEPTION_MESSAGE_KEY_REPORT_COMPILER_NOT_SET

Method Summary

Methods

Modifier and Type	Method and Description
JasperReport	compile(InputStream inputStream) Compiles the serialized report design object read from the supplied input stream and returns the generated compiled report design object.
JasperReport	compile(JasperDesign jasperDesign) Compiles the report design object received as parameter and returns the generated compiled report design object.
JasperReport	compile(String sourceFileName) Compiles the XML report design file received as parameter, and returns the compiled report design object.
static JasperReport	compileReport(InputStream inputStream)
static JasperReport	compileReport(JasperDesign jasperDesign)
static JasperReport	compileReport(String sourceFileName)
static void	compileReportToFile(JasperDesign jasperDesign, String destFileName)
static String	compileReportToFile(String sourceFileName)
static void	compileReportToFile(String sourceFileName, String destFileName)
static void	compileReportToStream(InputStream inputStream, OutputStream outputStream)
static void	compileReportToStream(JasperDesign jasperDesign, OutputStream outputStream)
void	compileToFile(JasperDesign jasperDesign, String destFileName) Compiles the report design object received as the first parameter, placing the result in the file specified by the second parameter.
String	compileToFile(String sourceFileName) Compiles the XML report design file specified by the parameter.
void	compileToFile(String sourceFileName, String destFileName) Compiles the XML report design file received as the first parameter, placing the result in the file specified by the second parameter.
void	compileToStream(InputStream inputStream, OutputStream outputStream) Compiles the XML representation of the report design read from the supplied input stream and writes the generated compiled report design object to the output stream specified by the second parameter.
void	compileToStream(JasperDesign jasperDesign, OutputStream outputStream) Compiles the report design object represented by the first parameter and writes the generated compiled report design object to the output stream specified by the second parameter.
JREvaluator	getEvaluator(JasperReport jasperReport)
JREvaluator	getEvaluator(JasperReport jasperReport, JRCrosstab crosstab)
JREvaluator	getEvaluator(JasperReport jasperReport, JRDataset dataset)
static JasperCompileManager	getInstance(JasperReportsContext jasperReportsContext)
protected void	initialize(JREvaluator evaluator)
static JREvaluator	loadEvaluator(JasperReport jasperReport)
static JREvaluator	loadEvaluator(JasperReport jasperReport, JRCrosstab crosstab)
static JREvaluator	loadEvaluator(JasperReport jasperReport, JRDataset dataset)
Collection<JRValidationFault>	verify(JasperDesign jasperDesign) Verifies the validity and consistency of the report design object.
static Collection<JRValidationFault>	verifyDesign(JasperDesign jasperDesign)
static String	writeReportToXml(JRReport report)
static void	writeReportToXmlFile(JRReport report, String destFileName)
static String	writeReportToXmlFile(String sourceFileName)
static void	writeReportToXmlFile(String sourceFileName, String destFileName)
static void	writeReportToXmlStream(InputStream inputStream, OutputStream outputStream)
static void	writeReportToXmlStream(JRReport report, OutputStream outputStream)
String	writeToXml(JRReport report) Generates the XML representation of the report design object supplied as parameter using the "UTF-8" enconding.
void	writeToXmlFile(JRReport report, String destFileName) Generates the XML representation of the report design supplied as the first parameter and place it in the file specified by the second parameter.
String	writeToXmlFile(String sourceFileName) Generates the XML representation of the report design loaded from the specified filename.
void	writeToXmlFile(String sourceFileName, String destFileName) Generates the XML representation of the report design loaded from the first file parameter and place it in the file specified by the second parameter.
void	writeToXmlStream(InputStream inputStream, OutputStream outputStream) Generates the XML representation of the serialized report design object read from the supplied input stream abd writes it to the specified output stream, using the "UTF-8" encoding.
void	writeToXmlStream(JRReport report, OutputStream outputStream) Generates the XML representation of the report design object supplied as parameter and writes it to the specified output stream, using the "UTF-8" encoding.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

EXCEPTION_MESSAGE_KEY_INSTANTIATE_REPORT_COMPILER_FAILURE

public static final String EXCEPTION_MESSAGE_KEY_INSTANTIATE_REPORT_COMPILER_FAILURE

See Also:

Constant Field Values

EXCEPTION_MESSAGE_KEY_REPORT_COMPILER_CLASS_NOT_FOUND

public static final String EXCEPTION_MESSAGE_KEY_REPORT_COMPILER_CLASS_NOT_FOUND

See Also:

Constant Field Values

EXCEPTION_MESSAGE_KEY_REPORT_COMPILER_NOT_SET

public static final String EXCEPTION_MESSAGE_KEY_REPORT_COMPILER_NOT_SET

See Also:

Constant Field Values

Method Detail

getInstance

public static JasperCompileManager getInstance(JasperReportsContext jasperReportsContext)

compileToFile

public String compileToFile(String sourceFileName)
                     throws JRException

Compiles the XML report design file specified by the parameter. The result of this operation is another file that will contain the serialized JasperReport object representing the compiled report design, having the same name as the report design as declared in the XML plus the *.jasper extension, located in the same directory as the XML source file.

Parameters:

sourceFileName - XML source file name

Returns:

resulting file name containing a serialized JasperReport object

Throws:

JRException

compileToFile

public void compileToFile(String sourceFileName,
                 String destFileName)
                   throws JRException

Compiles the XML report design file received as the first parameter, placing the result in the file specified by the second parameter. The resulting file will contain a serialized instance of a JasperReport object representing the compiled report design.

Parameters:

sourceFileName - XML source file name

destFileName - file name to place the result into

Throws:

JRException

compileToFile

public void compileToFile(JasperDesign jasperDesign,
                 String destFileName)
                   throws JRException

Compiles the report design object received as the first parameter, placing the result in the file specified by the second parameter. The resulting file will contain a serialized instance of a JasperReport object representing the compiled report design.

Parameters:

jasperDesign - source report design object

destFileName - file name to place the compiled report design into

Throws:

JRException

compile

public JasperReport compile(String sourceFileName)
                     throws JRException

Compiles the XML report design file received as parameter, and returns the compiled report design object.

Parameters:

sourceFileName - XML source file name

Returns:

compiled report design object

Throws:

JRException

compileToStream

public void compileToStream(InputStream inputStream,
                   OutputStream outputStream)
                     throws JRException

Compiles the XML representation of the report design read from the supplied input stream and writes the generated compiled report design object to the output stream specified by the second parameter.

Parameters:

inputStream - XML source input stream

outputStream - output stream to write the compiled report design to

Throws:

JRException

compileToStream

public void compileToStream(JasperDesign jasperDesign,
                   OutputStream outputStream)
                     throws JRException

Compiles the report design object represented by the first parameter and writes the generated compiled report design object to the output stream specified by the second parameter.

Parameters:

jasperDesign - source report design object

outputStream - output stream to write the compiled report design to

Throws:

JRException

compile

public JasperReport compile(InputStream inputStream)
                     throws JRException

Compiles the serialized report design object read from the supplied input stream and returns the generated compiled report design object.

Parameters:

inputStream - XML source input stream

Returns:

compiled report design object

Throws:

JRException

compile

public JasperReport compile(JasperDesign jasperDesign)
                     throws JRException

Compiles the report design object received as parameter and returns the generated compiled report design object.

Parameters:

jasperDesign - source report design object

Returns:

compiled report design object

Throws:

JRException

See Also:

JRCompiler

verify

public Collection<JRValidationFault> verify(JasperDesign jasperDesign)

Verifies the validity and consistency of the report design object. Returns a collection of errors, if problems are found in the report design.

Parameters:

jasperDesign - report design object to verify

Returns:

collection of JRValidationFault if problems are found

See Also:

JRVerifier

getEvaluator

public JREvaluator getEvaluator(JasperReport jasperReport,
                       JRDataset dataset)
                         throws JRException

Throws:

JRException

getEvaluator

public JREvaluator getEvaluator(JasperReport jasperReport,
                       JRCrosstab crosstab)
                         throws JRException

Throws:

JRException

getEvaluator

public JREvaluator getEvaluator(JasperReport jasperReport)
                         throws JRException

Throws:

JRException

initialize

protected void initialize(JREvaluator evaluator)

writeToXmlFile

public String writeToXmlFile(String sourceFileName)
                      throws JRException

Generates the XML representation of the report design loaded from the specified filename. The result of this operation is an "UTF-8" encoded XML file having the same name as the report design, plus the *.jasper.jrxml extension, located in the same directory as the source file.

Parameters:

sourceFileName - source file name containing the report design object

Returns:

XML representation of the report design

Throws:

JRException

writeToXmlFile

public void writeToXmlFile(String sourceFileName,
                  String destFileName)
                    throws JRException

Generates the XML representation of the report design loaded from the first file parameter and place it in the file specified by the second parameter. The result is "UTF-8" encoded.

Parameters:

sourceFileName - source file name containing the report design object

destFileName - output file name to write the XML report design representation to

Throws:

JRException

writeToXmlFile

public void writeToXmlFile(JRReport report,
                  String destFileName)
                    throws JRException

Generates the XML representation of the report design supplied as the first parameter and place it in the file specified by the second parameter. The result is "UTF-8" encoded.

Parameters:

report - source report design object

destFileName - output file name to write the XML report design representation to

Throws:

JRException

See Also:

JRXmlWriter

writeToXmlStream

public void writeToXmlStream(InputStream inputStream,
                    OutputStream outputStream)
                      throws JRException

Generates the XML representation of the serialized report design object read from the supplied input stream abd writes it to the specified output stream, using the "UTF-8" encoding.

Parameters:

inputStream - source input stream to read the report design object from

outputStream - output stream to write the XML report design representation to

Throws:

JRException

writeToXmlStream

public void writeToXmlStream(JRReport report,
                    OutputStream outputStream)
                      throws JRException

Generates the XML representation of the report design object supplied as parameter and writes it to the specified output stream, using the "UTF-8" encoding.

Parameters:

report - source report design object

outputStream - output stream to write the XML report design representation to

Throws:

JRException

See Also:

JRXmlWriter

writeToXml

public String writeToXml(JRReport report)

Generates the XML representation of the report design object supplied as parameter using the "UTF-8" enconding.

Parameters:

report - source report design object

Returns:

XML representation of the report design

See Also:

JRXmlWriter

compileReportToFile

public static String compileReportToFile(String sourceFileName)
                                  throws JRException

Throws:

JRException

See Also:

compileToFile(String)

compileReportToFile

public static void compileReportToFile(String sourceFileName,
                       String destFileName)
                                throws JRException

Throws:

JRException

See Also:

compileToFile(String, String)

compileReportToFile

public static void compileReportToFile(JasperDesign jasperDesign,
                       String destFileName)
                                throws JRException

Throws:

JRException

See Also:

compileToFile(JasperDesign, String)

compileReport

public static JasperReport compileReport(String sourceFileName)
                                  throws JRException

Throws:

JRException

See Also:

compile(String)

compileReportToStream

public static void compileReportToStream(InputStream inputStream,
                         OutputStream outputStream)
                                  throws JRException

Throws:

JRException

See Also:

compileToStream(InputStream, OutputStream)

compileReportToStream

public static void compileReportToStream(JasperDesign jasperDesign,
                         OutputStream outputStream)
                                  throws JRException

Throws:

JRException

See Also:

compileToStream(JasperDesign, OutputStream)

compileReport

public static JasperReport compileReport(InputStream inputStream)
                                  throws JRException

Throws:

JRException

See Also:

compile(InputStream)

compileReport

public static JasperReport compileReport(JasperDesign jasperDesign)
                                  throws JRException

Throws:

JRException

See Also:

compile(JasperDesign)

verifyDesign

public static Collection<JRValidationFault> verifyDesign(JasperDesign jasperDesign)

See Also:

verify(JasperDesign)

loadEvaluator

public static JREvaluator loadEvaluator(JasperReport jasperReport,
                        JRDataset dataset)
                                 throws JRException

Throws:

JRException

See Also:

getEvaluator(JasperReport, JRDataset)

loadEvaluator

public static JREvaluator loadEvaluator(JasperReport jasperReport,
                        JRCrosstab crosstab)
                                 throws JRException

Throws:

JRException

See Also:

getEvaluator(JasperReport, JRCrosstab)

loadEvaluator

public static JREvaluator loadEvaluator(JasperReport jasperReport)
                                 throws JRException

Throws:

JRException

See Also:

getEvaluator(JasperReport)

writeReportToXmlFile

public static String writeReportToXmlFile(String sourceFileName)
                                   throws JRException

Throws:

JRException

See Also:

writeToXmlFile(String)

writeReportToXmlFile

public static void writeReportToXmlFile(String sourceFileName,
                        String destFileName)
                                 throws JRException

Throws:

JRException

See Also:

writeToXmlFile(String, String)

writeReportToXmlFile

public static void writeReportToXmlFile(JRReport report,
                        String destFileName)
                                 throws JRException

Throws:

JRException

See Also:

writeToXmlFile(JRReport, String)

writeReportToXmlStream

public static void writeReportToXmlStream(InputStream inputStream,
                          OutputStream outputStream)
                                   throws JRException

Throws:

JRException

See Also:

writeToXmlStream(InputStream, OutputStream)

writeReportToXmlStream

public static void writeReportToXmlStream(JRReport report,
                          OutputStream outputStream)
                                   throws JRException

Throws:

JRException

See Also:

writeToXmlStream(JRReport, OutputStream)

writeReportToXml

public static String writeReportToXml(JRReport report)

See Also:

writeToXml(JRReport)