Package liquibase.executor.jvm

Class ColumnMapRowMapper

java.lang.Object

liquibase.executor.jvm.ColumnMapRowMapper

All Implemented Interfaces:

RowMapper

public class ColumnMapRowMapper
extends Object
implements RowMapper

RowMapper implementation that creates a java.util.Map for each row, representing all columns as key-value pairs: one entry for each column, with the column name as key.

The Map implementation to use and the key to use for each column in the column Map can be customized through overriding createColumnMap(int) and getColumnKey(java.lang.String), respectively.

Constructor Summary

Constructors

Constructor	Description
ColumnMapRowMapper(boolean caseSensitiveDatabase)

Method Summary

Modifier and Type	Method	Description
protected Map	createColumnMap(int columnCount)	Create a Map instance to be used as column map.
protected String	getColumnKey(String columnName)	Determine the key to use for the given column in the column Map.
protected Object	getColumnValue(ResultSet rs, int index)	Retrieve a JDBC object value for the specified column.
Object	mapRow(ResultSet rs, int rowNum)	Implementations must implement this method to map each row of data in the ResultSet.

Methods inherited from class java.lang.Object

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

Constructor Detail

ColumnMapRowMapper

public ColumnMapRowMapper(boolean caseSensitiveDatabase)

Method Detail

mapRow

public Object mapRow(ResultSet rs,
                     int rowNum)
              throws SQLException

Description copied from interface: RowMapper

Implementations must implement this method to map each row of data in the ResultSet. This method should not call next() on the ResultSet; it is only supposed to map values of the current row.

Specified by:

mapRow in interface RowMapper

Parameters:

rs - the ResultSet to map (pre-initialized for the current row)

rowNum - the number of the current row

Returns:

the result object for the current row

Throws:

SQLException - if a SQLException is encountered getting column values (that is, there's no need to catch SQLException)

createColumnMap

protected Map createColumnMap(int columnCount)

Create a Map instance to be used as column map.

Parameters:

columnCount - the column count, to be used as initial capacity for the Map

Returns:

the new Map instance

getColumnKey

protected String getColumnKey(String columnName)

Determine the key to use for the given column in the column Map.

Parameters:

columnName - the column name (uppercase) as returned by the ResultSet

Returns:

the column key to use

See Also:

ResultSetMetaData.getColumnName(int)

getColumnValue

protected Object getColumnValue(ResultSet rs,
                                int index)
                         throws SQLException

Retrieve a JDBC object value for the specified column.

The default implementation uses the getObject method. Additionally, this implementation includes a "hack" to get around Oracle returning a non standard object for their TIMESTAMP datatype.

Parameters:

rs - is the ResultSet holding the data

index - is the column index

Returns:

the Object returned

Throws:

SQLException