net.sf.jasperreports.engine.data

Class JRCsvDataSourceProvider

java.lang.Object

net.sf.jasperreports.engine.data.JRCsvDataSourceProvider

All Implemented Interfaces:

JRDataSourceProvider

public class JRCsvDataSourceProvider
extends Object
implements JRDataSourceProvider

Author:

Ionut Nedelcu ([email protected])

Field Summary

Fields

Modifier and Type	Field and Description
static String	EXCEPTION_MESSAGE_KEY_CANNOT_FIND_SOURCE

Constructor Summary

Constructors

Constructor and Description
JRCsvDataSourceProvider(File file) Builds a datasource instance.
JRCsvDataSourceProvider(InputStream stream)
JRCsvDataSourceProvider(Reader reader) Builds a datasource instance.

Method Summary

Modifier and Type	Method and Description
JRDataSource	create(JasperReport report) Creates and returns a new instance of the provided data source.
void	dispose(JRDataSource dataSource) Disposes the data source previously obtained using the create method.
String[]	getColumnNames()
DateFormat	getDateFormat()
char	getFieldDelimiter()
JRField[]	getFields(JasperReport report) Returns the fields that are available from the data source.
NumberFormat	getNumberFormat()
String	getRecordDelimiter()
void	setColumnNames(String[] colNames)
void	setDateFormat(DateFormat dateFormat)
void	setFieldDelimiter(char fieldDelimiter)
void	setNumberFormat(NumberFormat numberFormat)
void	setRecordDelimiter(String recordDelimiter)
boolean	supportsGetFieldsOperation() Returns true if the provider supports the getFields operation.

Methods inherited from class java.lang.Object

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

Field Detail

EXCEPTION_MESSAGE_KEY_CANNOT_FIND_SOURCE

public static final String EXCEPTION_MESSAGE_KEY_CANNOT_FIND_SOURCE

See Also:

Constant Field Values

Constructor Detail

JRCsvDataSourceProvider

public JRCsvDataSourceProvider(InputStream stream)

Parameters:

stream - an input stream containing CSV data

JRCsvDataSourceProvider

public JRCsvDataSourceProvider(File file)
                        throws FileNotFoundException

Builds a datasource instance.

Parameters:

file - a file containing CSV data

Throws:

FileNotFoundException

JRCsvDataSourceProvider

public JRCsvDataSourceProvider(Reader reader)

Builds a datasource instance.

Parameters:

reader - a Reader instance, for reading the stream

Method Detail

supportsGetFieldsOperation

public boolean supportsGetFieldsOperation()

Description copied from interface: JRDataSourceProvider

Returns true if the provider supports the getFields operation. By returning true in this method the data source provider indicates that it is able to introspect the data source and discover the available fields.

Specified by:

supportsGetFieldsOperation in interface JRDataSourceProvider

Returns:

true if the getFields() operation is supported.

getFields

public JRField[] getFields(JasperReport report)
                    throws JRException,
                           UnsupportedOperationException

Description copied from interface: JRDataSourceProvider

Returns the fields that are available from the data source. The provider can use the passed in report to extract some additional configuration information such as report properties.

Specified by:

getFields in interface JRDataSourceProvider

Parameters:

report - the report that will be filled using the data source created by this provider. The passed in report can be null. That means that no compiled report is available yet.

Returns:

a non null fields array. If there are no fields then an empty array must be returned.

Throws:

JRException - if an error occurs.

UnsupportedOperationException - is the method is not supported

create

public JRDataSource create(JasperReport report)
                    throws JRException

Description copied from interface: JRDataSourceProvider

Creates and returns a new instance of the provided data source. The provider can use the passed in report to extract some additional configuration information such as report properties.

Specified by:

create in interface JRDataSourceProvider

Parameters:

report - the report that will be filled using the created data source.

Throws:

JRException - if the data source creation has failed

dispose

public void dispose(JRDataSource dataSource)
             throws JRException

Description copied from interface: JRDataSourceProvider

Disposes the data source previously obtained using the create method. This method must close any resources associated with the data source. For instance the database connection should be closed in case of the JRResultSetDataSource.
Note: The provider must take care of the resource - data source association. For example in case of the JRResultSetDataSource a subclass of this data source can be created. This subclass will hold the database connection and the prepared statement that were used to obtain the ResultSet. On the time of the dispose these resources can be retrieved from the data source object and closed.

Specified by:

dispose in interface JRDataSourceProvider

Parameters:

dataSource - the data source to dispose

Throws:

JRException - if the data source could not be disposed

getColumnNames

public String[] getColumnNames()

setColumnNames

public void setColumnNames(String[] colNames)

getDateFormat

public DateFormat getDateFormat()

setDateFormat

public void setDateFormat(DateFormat dateFormat)

getFieldDelimiter

public char getFieldDelimiter()

setFieldDelimiter

public void setFieldDelimiter(char fieldDelimiter)

getRecordDelimiter

public String getRecordDelimiter()

setRecordDelimiter

public void setRecordDelimiter(String recordDelimiter)

getNumberFormat

public NumberFormat getNumberFormat()

setNumberFormat

public void setNumberFormat(NumberFormat numberFormat)