org.makumba.providers
Interface SQLParameterTransformer

All Known Implementing Classes:

MqlSQLParameterTransformer

public interface SQLParameterTransformer

Generates the SQL query to be executed against the DBMS, together with the transformed query parameters. Implementations of this interface also take care of makumba-specific concerns regarding query parameters:

• expansion of list/vector parameters
• transformation of named parameters into (ordered) numbered parameters

Version:

$Id: SQLQueryGenerator.java,v 1.1 Mar 3, 2010 6:50:10 PM manu Exp $

Author:

Manuel Gay

Method Summary

int	getArgumentCount() The number of arguments of the query
String	getSQLQuery(NameResolver nr) Provides the SQL query to be executed on the DBMS, with expanded and transformed parameters
DataDefinition	getSQLQueryArgumentTypes() Gets the types of the arguments
void	init(Map<String,Object> arguments) Initialises the SQLQueryGenerator.
Object[]	toArgumentArray(Map<String,Object> arguments) Provides the arguments necessary in order to execute the query on the DBMS, in the order following the one of the query returned by #getSQLQuery(NameResolver, Object)

Method Detail

init

void init(Map<String,Object> arguments)

Initialises the SQLQueryGenerator. Called at resource configuration time

getSQLQuery

String getSQLQuery(NameResolver nr)

Provides the SQL query to be executed on the DBMS, with expanded and transformed parameters

Parameters:

nr - the NameResolver used to resolve database-level table and field names

Returns:

the expanded SQL query String

toArgumentArray

Object[] toArgumentArray(Map<String,Object> arguments)

Provides the arguments necessary in order to execute the query on the DBMS, in the order following the one of the query returned by #getSQLQuery(NameResolver, Object)

Returns:

an object array containing the ordered parameter values

getSQLQueryArgumentTypes

DataDefinition getSQLQueryArgumentTypes()

Gets the types of the arguments

Returns:

a DataDefinition with the types of all the arguments

getArgumentCount

int getArgumentCount()

The number of arguments of the query