net.sf.basedb.util.parser
Class JepMapper

java.lang.Object
  net.sf.basedb.util.parser.JepMapper

All Implemented Interfaces:

Mapper

public class JepMapper
extends Object
implements Mapper

A mapper that uses Jep to calculate the final value. It should be used for numerical values that needs to be transformed before beeing inserted into the database. For example, if a file contains the radius of a spot instead of the diameter, it could be mapped as =2 * col('Radius').

It can also be used for concatenating string values but syntax with backslashes has better performance. The following mapping expressions are equivalent, but we recommend using the first one:

Field Summary




private  ColFunction
colFunction



           



private  DataNoFunction
dataNoFunction



           



private  String
expression



           



private  boolean
hasDataNo



           



private  boolean
hasLineNo



           



private  LineNoFunction
lineNoFunction



           



private  NumberFormat
numberFormat



           



private  JEP
parser



           


 



Constructor Summary
JepMapper(String expression,
          List<String> columnHeaders)



          Create a new JepMapper.
JepMapper(String expression,
          List<String> columnHeaders,
          NumberFormat numberFormat)



           
JepMapper(String expression,
          List<String> columnHeaders,
          NumberFormat numberFormat,
          boolean ignoreNonExistingColumns)



           
 



Method Summary




 Float
getFloat(FlatFileParser.Data data)



          Get the value for the line of data as a float.



 Integer
getInt(FlatFileParser.Data data)



          Get the value for the line of data as an integer.



 String
getValue(FlatFileParser.Data data)



          Get the value for the line of data.



private  void
setData(FlatFileParser.Data data)



           



 String
toString()



           


 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 





Field Detail



expression
private final String expression







parser
private final JEP parser







colFunction
private final ColFunction colFunction







lineNoFunction
private final LineNoFunction lineNoFunction







hasLineNo
private final boolean hasLineNo







dataNoFunction
private final DataNoFunction dataNoFunction







hasDataNo
private final boolean hasDataNo







numberFormat
private final NumberFormat numberFormat








Constructor Detail



JepMapper
public JepMapper(String expression,
                 List<String> columnHeaders)

Create a new JepMapper.


Parameters:
expression - The JEP expression
columnHeaders - A map from column names to column indexes




JepMapper
public JepMapper(String expression,
                 List<String> columnHeaders,
                 NumberFormat numberFormat)





JepMapper
public JepMapper(String expression,
                 List<String> columnHeaders,
                 NumberFormat numberFormat,
                 boolean ignoreNonExistingColumns)






Method Detail



getValue
public String getValue(FlatFileParser.Data data)

Description copied from interface: Mapper
Get the value for the line of data.


Specified by:
getValue in interface Mapper


Parameters:
data - The line of data
Returns:
A string value





getInt
public Integer getInt(FlatFileParser.Data data)

Description copied from interface: Mapper
Get the value for the line of data as an integer.


Specified by:
getInt in interface Mapper


Parameters:
data - The line of data
Returns:
The value as an integer





getFloat
public Float getFloat(FlatFileParser.Data data)

Description copied from interface: Mapper
Get the value for the line of data as a float.


Specified by:
getFloat in interface Mapper


Parameters:
data - The line of data
Returns:
The value as a float





toString
public String toString()


Overrides:
toString in class Object








setData
private void setData(FlatFileParser.Data data)