com.antelmann.sql
Class BaseRowMapper<T extends Resource>

java.lang.Object
  com.antelmann.sql.BaseRowMapper<T>

All Implemented Interfaces:

ObjectRowMapper<T>

public abstract class BaseRowMapper<T extends Resource>
extends Object
implements ObjectRowMapper<T>

serves as a base class for implementations of ObjectRowMapper. The methods left to be implemented directly depend on the class to be mapped:

• generateRowProperties(Object)
• generateNewID()
• instanciate(RowItem)

Author:

Holger Antelmann

See Also:

SimpleEntityFilter

Field Summary

protected ConnectionHelper	helper
protected String	idColumn
protected String	tableName

Constructor Summary

BaseRowMapper(Connection con, String tableName, String idColumn)

Method Summary

protected abstract Map<String,Object>	generateRowProperties(T entry) generates a map that contains all columns mapped to their values, so that the map can be used to store the object into a row.
String	getIDColumnName()
ResultSet	getResultSet(Filter<T> filter) constructs the ResultSet that corresponds closesd to the filter; note that the filter may be null, in which case the select statement should return all rows.
ResultSet	getResultSet(SimpleEntityFilter<? extends Entity> filter)
String	getTableName() generates a (blank) RowItem that tells the caller in what table to look for what value in what field to find the object.
RowItem	mapToRow(T entry) uses the abstract generateRowProperties(T) method to generate the RowItem

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.antelmann.sql.ObjectRowMapper

generateNewID, instanciate

Field Detail

helper

protected ConnectionHelper helper

tableName

protected String tableName

idColumn

protected String idColumn

Constructor Detail

BaseRowMapper

public BaseRowMapper(Connection con,
                     String tableName,
                     String idColumn)

Method Detail

getTableName

public String getTableName()

Description copied from interface: ObjectRowMapper

generates a (blank) RowItem that tells the caller in what table to look for what value in what field to find the object. Other than null, any parameter should be accepted. The return value must not be null for any ID. An implementation can hence use this method to get a sample RowItem for accessing table and idColumn.

Specified by:

getTableName in interface ObjectRowMapper<T extends Resource>

getIDColumnName

public String getIDColumnName()

Specified by:

getIDColumnName in interface ObjectRowMapper<T extends Resource>

generateRowProperties

protected abstract Map<String,Object> generateRowProperties(T entry)

generates a map that contains all columns mapped to their values, so that the map can be used to store the object into a row. The ID column and the corresponding ID should not be put in there, as this will happen automatically later.

mapToRow

public RowItem mapToRow(T entry)

uses the abstract generateRowProperties(T) method to generate the RowItem

Specified by:

mapToRow in interface ObjectRowMapper<T extends Resource>

getResultSet

public ResultSet getResultSet(SimpleEntityFilter<? extends Entity> filter)
                       throws SQLException

Throws:

SQLException

getResultSet

public ResultSet getResultSet(Filter<T> filter)
                       throws SQLException

Description copied from interface: ObjectRowMapper

constructs the ResultSet that corresponds closesd to the filter; note that the filter may be null, in which case the select statement should return all rows. The returned PreparedStatement should allow at least for all objects accepted by the filter; it may include more, which would then be filtered out by the filter itself.

Specified by:

getResultSet in interface ObjectRowMapper<T extends Resource>

Throws:

SQLException