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java.lang.Objectorg.springframework.jdbc.core.BeanPropertyRowMapper
org.springframework.jdbc.core.simple.ParameterizedBeanPropertyRowMapper<T>
public class ParameterizedBeanPropertyRowMapper<T>
ParameterizedRowMapper
implementation that converts a row into a new instance
of the specified mapped target class. The mapped target class must be a top-level class
and it must have a default or no-arg constructor.
Uses Java 5 covariant return types to override the return type of the mapRow(java.sql.ResultSet, int)
method to be the type parameter T
.
Column values are mapped based on matching the column name as obtained from result set metadata to public setters for the corresponding properties. The names are matched either directly or by transforming a name separating the parts with underscores to the same name using "camel" case.
Mapping is provided for fields in the target class for many common types, e.g.:
String, boolean, Boolean, byte, Byte, short, Short, int, Integer, long, Long,
float, Float, double, Double, BigDecimal, java.util.Date
, etc.
To facilitate mapping between columns and fields that don't have matching names, try using column aliases in the SQL statement like "select fname as first_name from customer".
Please note that this class is designed to provide convenience rather than high performance. For best performance consider using a custom RowMapper.
ParameterizedRowMapper
Field Summary |
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Fields inherited from class org.springframework.jdbc.core.BeanPropertyRowMapper |
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logger |
Constructor Summary | |
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ParameterizedBeanPropertyRowMapper()
Create a new ParameterizedBeanPropertyRowMapper. |
Method Summary | ||
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T |
mapRow(ResultSet rs,
int rowNumber)
Extract the values for all columns in the current row. |
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static
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newInstance(Class<T> mappedClass)
Static factory method to create a new ParameterizedBeanPropertyRowMapper (with the mapped class specified only once). |
Methods inherited from class org.springframework.jdbc.core.BeanPropertyRowMapper |
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getColumnValue, getMappedClass, initBeanWrapper, initialize, isCheckFullyPopulated, setCheckFullyPopulated, setMappedClass |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public ParameterizedBeanPropertyRowMapper()
Generally prefer the newInstance(Class)
method instead,
which avoids the need for specifying the mapped type twice.
BeanPropertyRowMapper.setMappedClass(java.lang.Class)
Method Detail |
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public T mapRow(ResultSet rs, int rowNumber) throws SQLException
BeanPropertyRowMapper
Utilizes public setters and result set metadata.
mapRow
in interface RowMapper
mapRow
in interface ParameterizedRowMapper<T>
mapRow
in class BeanPropertyRowMapper
rs
- the ResultSet to map (pre-initialized for the current row)rowNumber
- the number of the current row
SQLException
- if a SQLException is encountered getting
column values (that is, there's no need to catch SQLException)ResultSetMetaData
public static <T> ParameterizedBeanPropertyRowMapper<T> newInstance(Class<T> mappedClass)
mappedClass
- the class that each row should be mapped to
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