com.finalist.tools.database
Class MySQLRowMapper

java.lang.Object
  com.finalist.tools.database.RowMapper
      com.finalist.tools.database.MySQLRowMapper

public class MySQLRowMapper

extends RowMapper

Implementation of the rowmapper for MySQL. This class has been tested against MySQL 3.23.53

Author:

P.S.D.Reitsma, Michael O'Connor - Finalist IT Group

Constructor Summary

MySQLRowMapper()

Method Summary

java.sql.PreparedStatement	bind(java.sql.PreparedStatement pstmt, java.lang.Object bindVar, java.lang.String bindVarClassType, int pos) Method that binds an object of a specified type into a PreparedStatement and returns the PreparedStatement.
java.lang.Object	unBindIntoBean(java.sql.ResultSet rset, java.lang.Object target) Method reads the values from a ResultSet and puts them as properties into a bean.
java.util.HashMap	unBindIntoHashMap(java.sql.ResultSet rset, java.util.HashMap target) Method reads the values from a ResultSet and puts them as properties into a HashMap.

Methods inherited from class java.lang.Object

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

Constructor Detail

MySQLRowMapper

public MySQLRowMapper()

Method Detail

bind

public java.sql.PreparedStatement bind(java.sql.PreparedStatement pstmt,
                                       java.lang.Object bindVar,
                                       java.lang.String bindVarClassType,
                                       int pos)
                                throws java.sql.SQLException,
                                       NotMappableException

Method that binds an object of a specified type into a PreparedStatement and returns the PreparedStatement. The following mappings are made.

Input Type	Method used	NullType used
String	setString()	java.sql.Types.VARCHAR
int/Integer	setInt()	java.sql.Types.Numeric
byte/Byte	setByte()	java.sql.Types.Numeric
short/Short	setShort()	java.sql.Types.Numeric
float/Float	setFloat()	java.sql.Types.Numeric
long/Long	setLong()	java.sql.Types.Numeric
double/Double	setDouble()	java.sql.Types.Numeric
util.Date	setDate()	java.sql.Types.Date
util.Calendar	setDate()	java.sql.Types.Date

Specified by:

bind in class RowMapper

Parameters:

pstmt - PreparedStatement to which the object should be bound.

bindVar - the object that is to be bound.

bindVarClassType - the full classname that identifies the type of the class

pos - the position at which the object should be bound into the statement.

Returns:

PreparedStatement the resulting PreparedStatement after the bind has happened.

Throws:

NotMappableException - when no appropriate bind method could be found

java.sql.SQLException

unBindIntoHashMap

public java.util.HashMap unBindIntoHashMap(java.sql.ResultSet rset,
                                           java.util.HashMap target)
                                    throws java.sql.SQLException,
                                           NotMappableException

Method reads the values from a ResultSet and puts them as properties into a HashMap. The keys of the HashMap will be the column aliases of the SQL-Statement and the values will be java Objects. The following conversions rules are valid:

Oracle Datatype	Java Object type
VARCHAR2	String
DATE	java.sql.Timestamp
NUMBER(<3,0)	Byte
NUMBER(>2 <6,0)	Short
NUMBER(>5 <10,0)	Integer
NUMBER(>9 <19,0)	Long
NUMBER( (scale and precision)<13)	Float
NUMBER( (scale and precision)>12)	Double
CHAR	String
Date	java.util.Date

TODO: more mappings could be made.

Specified by:

unBindIntoHashMap in class RowMapper

Parameters:

rset - ResultSet

target - The HashMap in which the values are stored

Returns:

the resulting HashMap

Throws:

java.sql.SQLException - thrown when some SQL related error occurs.

NotMappableException - thrown when no appropriate mapping could be found to map a SQL datatype to a Java counterpart.

unBindIntoBean

public java.lang.Object unBindIntoBean(java.sql.ResultSet rset,
                                       java.lang.Object target)
                                throws java.sql.SQLException,
                                       NotMappableException

Method reads the values from a ResultSet and puts them as properties into a bean. The column-property mapping happens through the use of column aliases in the SQL Statement. The column aliases should map to a property name. The mapping is not case sensitive. TODO: need for more mapping might arise.

Specified by:

unBindIntoBean in class RowMapper

Parameters:

rset - ResultSet

target - The bean whose properties should be set.

Returns:

the resulting bean

Throws:

java.sql.SQLException - thrown when some SQL related error occurs.

NotMappableException - thrown when no appropriate mapping could be found to map a SQL datatype to a Java counterpart.