com.opencsv.bean

Class StatefulBeanToCsv<T>

java.lang.Object

com.opencsv.bean.StatefulBeanToCsv<T>

Type Parameters:

T - Type of the bean to be written

public class StatefulBeanToCsv<T>
extends Object

This class writes beans out in CSV format to a Writer, keeping state information and making an intelligent guess at the mapping strategy to be applied.

This class implements multi-threading on writing more than one bean, so there should be no need to use it across threads in an application. As such, it is not thread-safe.

Since:

3.9

Author:

Andrew Rucker Jones

See Also:

OpencsvUtils.determineMappingStrategy(java.lang.Class, java.util.Locale)

Constructor Summary

Constructors

Constructor and Description
StatefulBeanToCsv(MappingStrategy<T> mappingStrategy, boolean throwExceptions, boolean applyQuotesToAll, ICSVWriter csvWriter, org.apache.commons.collections4.MultiValuedMap<Class<?>,Field> ignoredFields) Constructor used to allow building of a StatefulBeanToCsv with a user-supplied ICSVWriter class.

Method Summary

Modifier and Type	Method and Description
List<CsvException>	getCapturedExceptions() Any exceptions captured during writing of beans to a CSV destination can be retrieved through this method.
boolean	isThrowExceptions()
void	setErrorLocale(Locale errorLocale) Sets the locale for all error messages.
void	setOrderedResults(boolean orderedResults) Sets whether or not results must be written in the same order in which they appear in the list of beans provided as input.
void	write(Iterator<T> iBeans) Writes an iterator of beans out to the Writer provided to the constructor.
void	write(List<T> beans) Writes a list of beans out to the Writer provided to the constructor.
void	write(Stream<T> beans) Writes a stream of beans out to the Writer provided to the constructor.
void	write(T bean) Writes a bean out to the Writer provided to the constructor.

Methods inherited from class java.lang.Object

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

Constructor Detail

StatefulBeanToCsv

public StatefulBeanToCsv(MappingStrategy<T> mappingStrategy,
                         boolean throwExceptions,
                         boolean applyQuotesToAll,
                         ICSVWriter csvWriter,
                         org.apache.commons.collections4.MultiValuedMap<Class<?>,Field> ignoredFields)

Constructor used to allow building of a StatefulBeanToCsv with a user-supplied ICSVWriter class.

Parameters:

mappingStrategy - The mapping strategy to use when writing a CSV file

throwExceptions - Whether or not exceptions should be thrown while writing the CSV file. If not, they are collected and can be retrieved via getCapturedExceptions().

applyQuotesToAll - Whether all output fields should be quoted

csvWriter - An user-supplied ICSVWriter for writing beans to a CSV output

ignoredFields - The fields to ignore during processing. May be null.

Method Detail

write

public void write(T bean)
           throws CsvDataTypeMismatchException,
                  CsvRequiredFieldEmptyException

Writes a bean out to the Writer provided to the constructor.

Parameters:

bean - A bean to be written to a CSV destination

Throws:

CsvDataTypeMismatchException - If a field of the bean is annotated improperly or an unsupported data type is supposed to be written

CsvRequiredFieldEmptyException - If a field is marked as required, but the source is null

write

public void write(List<T> beans)
           throws CsvDataTypeMismatchException,
                  CsvRequiredFieldEmptyException

Writes a list of beans out to the Writer provided to the constructor.

Parameters:

beans - A list of beans to be written to a CSV destination

Throws:

CsvDataTypeMismatchException - If a field of the beans is annotated improperly or an unsupported data type is supposed to be written

CsvRequiredFieldEmptyException - If a field is marked as required, but the source is null

write

public void write(Iterator<T> iBeans)
           throws CsvDataTypeMismatchException,
                  CsvRequiredFieldEmptyException

Writes an iterator of beans out to the Writer provided to the constructor.

Parameters:

iBeans - An iterator of beans to be written to a CSV destination

Throws:

CsvDataTypeMismatchException - If a field of the beans is annotated improperly or an unsupported data type is supposed to be written

CsvRequiredFieldEmptyException - If a field is marked as required, but the source is null

write

public void write(Stream<T> beans)
           throws CsvDataTypeMismatchException,
                  CsvRequiredFieldEmptyException

Writes a stream of beans out to the Writer provided to the constructor.

Parameters:

beans - A stream of beans to be written to a CSV destination

Throws:

CsvDataTypeMismatchException - If a field of the beans is annotated improperly or an unsupported data type is supposed to be written

CsvRequiredFieldEmptyException - If a field is marked as required, but the source is null

setOrderedResults

public void setOrderedResults(boolean orderedResults)

Sets whether or not results must be written in the same order in which they appear in the list of beans provided as input. The default is that order is preserved. If your data do not need to be ordered, you can get a slight performance boost by setting orderedResults to false. The lack of ordering then also applies to any captured exceptions, if you have chosen not to have exceptions thrown.

Parameters:

orderedResults - Whether or not the lines written are in the same order they appeared in the input

Since:

4.0

isThrowExceptions

public boolean isThrowExceptions()

Returns:

Whether or not exceptions are thrown. If they are not thrown, they are captured and returned later via getCapturedExceptions().

getCapturedExceptions

public List<CsvException> getCapturedExceptions()

Any exceptions captured during writing of beans to a CSV destination can be retrieved through this method.

Reads from the list are destructive! Calling this method will clear the list of captured exceptions. However, calling write(java.util.List) or write(java.lang.Object) multiple times with no intervening call to this method will not clear the list of captured exceptions, but rather add to it if further exceptions are thrown.

Returns:

A list of exceptions that would have been thrown during any and all read operations since the last call to this method

setErrorLocale

public void setErrorLocale(Locale errorLocale)

Sets the locale for all error messages.

Parameters:

errorLocale - Locale for error messages. If null, the default locale is used.

Since:

4.0