org.araneaframework.backend.list.helper.reader
Class ConverterBasedColumnReader

java.lang.Object
  org.araneaframework.backend.list.helper.reader.FilterResultSetColumnReader
      org.araneaframework.backend.list.helper.reader.ConverterBasedColumnReader

All Implemented Interfaces:

ResultSetColumnReader

public class ConverterBasedColumnReader

extends FilterResultSetColumnReader

ResultSetColumnReader that can have custom converters for each column.

This implementation wraps an existing ResultSetColumnReader by adding additional behavior if a certain column is being read.

To add a custom converter for a column use method addResultSetDeconverterForColumn(String, Converter). For that column Converter.reverseConvert(Object) is invoked and Converter.getDestinationType() is used as a Java type retrieved from the ResultSet.

Since:

1.1

Author:

Rein Raudjärv

Constructor Summary

ConverterBasedColumnReader(ResultSetColumnReader child)

Method Summary

void	addResultSetDeconverterForColumn(String columnName, Converter converter) Adds a deconverter for ResultSet.
Object	readFromResultSet(String columnName, ResultSet resultSet, Class javaType) This method should read some custom Java Object from the given ResultSet column.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConverterBasedColumnReader

public ConverterBasedColumnReader(ResultSetColumnReader child)

Method Detail

addResultSetDeconverterForColumn

public void addResultSetDeconverterForColumn(String columnName,
                                             Converter converter)

Adds a deconverter for ResultSet.

The converter is used to Converter.reverseConvert(Object) values from ResultSet.

Parameters:

columnName - ResultSet column name.

converter - converter that is used by reverseConvert() method.

readFromResultSet

public Object readFromResultSet(String columnName,
                                ResultSet resultSet,
                                Class javaType)

Description copied from interface: ResultSetColumnReader

This method should read some custom Java Object from the given ResultSet column.

Specified by:

readFromResultSet in interface ResultSetColumnReader

Overrides:

readFromResultSet in class FilterResultSetColumnReader