net.sf.jasperreports.engine.design
Class JRAbstractCompiler

java.lang.Object
  net.sf.jasperreports.engine.design.JRAbstractCompiler

All Implemented Interfaces:

JRCompiler

Direct Known Subclasses:

JavaScriptCompiler, JRAbstractJavaCompiler, JRBshCompiler

public abstract class JRAbstractCompiler
extends Object
implements JRCompiler

Base class for report compilers.

Version:

$Id: JRAbstractCompiler.java 5180 2012-03-29 13:23:12Z teodord $

Author:

Lucian Chirita (lucianc@users.sourceforge.net)

Field Summary

protected JasperReportsContext

jasperReportsContext

Fields inherited from interface net.sf.jasperreports.engine.design.JRCompiler

COMPILER_CLASS, COMPILER_CLASSPATH, COMPILER_KEEP_JAVA_FILE, COMPILER_PREFIX, COMPILER_TEMP_DIR

Constructor Summary

protected	JRAbstractCompiler(boolean needsSourceFiles) Deprecated. Replaced by JRAbstractCompiler(JasperReportsContext, boolean).
protected	JRAbstractCompiler(JasperReportsContext jasperReportsContext, boolean needsSourceFiles) Constructor.

Method Summary

protected abstract void	checkLanguage(String language) Checks that the report language is supported by the compiler.
JasperReport	compileReport(JasperDesign jasperDesign) Compiles a report design.
protected abstract String	compileUnits(JRCompilationUnit[] units, String classpath, File tempDirFile) Compiles several expression evaluator units.
protected abstract JRCompilationSourceCode	generateSourceCode(JRSourceCompileTask sourceTask) Generates expression evaluator code.
protected String	getCompilerClass()
protected abstract String	getSourceFileName(String unitName) Returns the name of the source file where generated source code for an unit is saved.
static String	getUnitName(JasperReport report, JRCrosstab crosstab) Returns the name of the expression evaluator unit for a crosstab of a report.
static String	getUnitName(JasperReport report, JRDataset dataset) Returns the name of the expression evaluator unit for a dataset of a report.
protected static String	getUnitName(JRReport report, int crosstabId, String nameSuffix)
protected static String	getUnitName(JRReport report, JRCrosstab crosstab, JRExpressionCollector expressionCollector, String nameSuffix)
protected static String	getUnitName(JRReport report, JRDataset dataset, String nameSuffix)
JREvaluator	loadEvaluator(JasperReport jasperReport) Loads the evaluator for a report's main dataset.
JREvaluator	loadEvaluator(JasperReport jasperReport, JRCrosstab crosstab) Loads a expression evaluator class for a crosstab of a report.
JREvaluator	loadEvaluator(JasperReport jasperReport, JRDataset dataset) Loads a expression evaluator class for a dataset of a report.
protected abstract JREvaluator	loadEvaluator(Serializable compileData, String unitName) Creates an expression evaluator instance from data saved when the report was compiled.

Methods inherited from class java.lang.Object

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

Field Detail

jasperReportsContext

protected final JasperReportsContext jasperReportsContext

Constructor Detail

JRAbstractCompiler

protected JRAbstractCompiler(JasperReportsContext jasperReportsContext,
                             boolean needsSourceFiles)

Constructor.

Parameters:

needsSourceFiles - whether the compiler needs source files or is able to do in memory compilation

If true, the generated code is saved in source files to be used by the compiler.

JRAbstractCompiler

protected JRAbstractCompiler(boolean needsSourceFiles)

Deprecated. Replaced by JRAbstractCompiler(JasperReportsContext, boolean).

Method Detail

getUnitName

public static String getUnitName(JasperReport report,
                                 JRDataset dataset)

Returns the name of the expression evaluator unit for a dataset of a report.

Parameters:

report - the report

dataset - the dataset

Returns:

the generated expression evaluator unit name

getUnitName

protected static String getUnitName(JRReport report,
                                    JRDataset dataset,
                                    String nameSuffix)

getUnitName

public static String getUnitName(JasperReport report,
                                 JRCrosstab crosstab)

Returns the name of the expression evaluator unit for a crosstab of a report.

Parameters:

report - the report

crosstab - the crosstab

Returns:

the generated expression evaluator unit name

getUnitName

protected static String getUnitName(JRReport report,
                                    JRCrosstab crosstab,
                                    JRExpressionCollector expressionCollector,
                                    String nameSuffix)

getUnitName

protected static String getUnitName(JRReport report,
                                    int crosstabId,
                                    String nameSuffix)

compileReport

public final JasperReport compileReport(JasperDesign jasperDesign)
                                 throws JRException

Description copied from interface: JRCompiler

Compiles a report design.

The compilation consists of verification of the design, generation of expression evaluators and construction of a serializable read-only version of the report.

A report compiler should usually extend JRAbstractCompiler.

Specified by:

compileReport in interface JRCompiler

Parameters:

jasperDesign - the report design

Returns:

the compiled report

Throws:

JRException

getCompilerClass

protected String getCompilerClass()

loadEvaluator

public JREvaluator loadEvaluator(JasperReport jasperReport)
                          throws JRException

Description copied from interface: JRCompiler

Loads the evaluator for a report's main dataset.

Specified by:

loadEvaluator in interface JRCompiler

Parameters:

jasperReport - the report

Returns:

the evaluator for the report's main dataset

Throws:

JRException

loadEvaluator

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

Description copied from interface: JRCompiler

Loads a expression evaluator class for a dataset of a report.

Specified by:

loadEvaluator in interface JRCompiler

Parameters:

jasperReport - the report

dataset - the dataset

Returns:

an instance of the dataset evaluator class

Throws:

JRException

loadEvaluator

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

Description copied from interface: JRCompiler

Loads a expression evaluator class for a crosstab of a report.

Specified by:

loadEvaluator in interface JRCompiler

Parameters:

jasperReport - the report

crosstab - the crosstab

Returns:

an instance of the dataset evaluator class

Throws:

JRException

loadEvaluator

protected abstract JREvaluator loadEvaluator(Serializable compileData,
                                             String unitName)
                                      throws JRException

Creates an expression evaluator instance from data saved when the report was compiled.

Parameters:

compileData - the data saved when the report was compiled

unitName - the evaluator unit name

Returns:

an expression evaluator instance

Throws:

JRException

checkLanguage

protected abstract void checkLanguage(String language)
                               throws JRException

Checks that the report language is supported by the compiler.

Parameters:

language - the report language

Throws:

JRException

generateSourceCode

protected abstract JRCompilationSourceCode generateSourceCode(JRSourceCompileTask sourceTask)
                                                       throws JRException

Generates expression evaluator code.

Parameters:

sourceTask - the source code generation information

Returns:

generated expression evaluator code

Throws:

JRException

compileUnits

protected abstract String compileUnits(JRCompilationUnit[] units,
                                       String classpath,
                                       File tempDirFile)
                                throws JRException

Compiles several expression evaluator units.

The result of the compilation should be set by calling setCompileData on all compile units.

Parameters:

units - the compilation units

classpath - the compilation classpath

tempDirFile - temporary directory

Returns:

a string containing compilation errors, or null if the compilation was successfull

Throws:

JRException

getSourceFileName

protected abstract String getSourceFileName(String unitName)

Returns the name of the source file where generated source code for an unit is saved.

If the compiler needs source files for compilation or COMPILER_KEEP_JAVA_FILE is set, the generated source will be saved in a file having the name returned by this method.

Parameters:

unitName - the unit name

Returns:

the source file name