com.solarmetric.kodo.impl.jdbc.query
Interface LiteralListener

All Superinterfaces:

FilterListener

public interface LiteralListener

extends FilterListener

Implementors of this interface are defining listeners which listen for lit:TAG on query filters to append to the generated where clause.

Literals are singular SQL expressions that evaluate by itself to true or false. For example a complete literal could be: (idx in (1,2,3)).

An example listener might be one for the SQL:
"t0.idx in (1,2,3)"

Here would be a sample class to accomplish this which would listen for:
lit:idIn ("1,2,3")

public class IdInListener implements LiteralListener
{
public String getTag () {return "idIn";}

public String embed (String argument)
{
return "t0.idx in (" + argument + ")";
}
}


Author:

Steve Kim

Method Summary

String

embed(String argument) The primary method which takes a single argument and transforms it into a single SQL block

Methods inherited from interface com.solarmetric.kodo.query.FilterListener

getTag

Method Detail

embed

public String embed(String argument)

The primary method which takes a single argument and transforms it into a single SQL block

Parameters:

argument - the argument passed into the filter

Returns:

SQL representing the listener's action