uk.ac.ed.epcc.webapp.jdbc.expr

Interface IndexedSQLValue<T,I extends DataObject>

Type Parameters:

T - Type of owning/home table.

I - Type of remote table

All Superinterfaces:

FilterProvider<T,IndexedReference>, SQLValue<IndexedReference>, Targetted<IndexedReference>

All Known Implementing Classes:

AbstractSelfSQLValue, CompositeIndexedSQLValue, ConstIndexedSQLValue, IndexedFieldValue, SelfSQLValue, TupleSelfSQLValue

public interface IndexedSQLValue<T,I extends DataObject>
extends SQLValue<IndexedReference>, FilterProvider<T,IndexedReference>

A SQLValue that generates a IndexedReference to a remote table. This also supports the necessary methods to join through to the remote table.

See Also:

DerefSQLExpression, RemoteSQLValue

Method Summary

Modifier and Type	Method and Description
DataObjectFactory<I>	getFactory() get the remote DataObjectFactory
SQLExpression<java.lang.Integer>	getIDExpression() Get a Integer valued SQLExpression for the id of the referenced value.
SQLFilter<T>	getSQLFilter(SQLFilter<I> fil) Create a filter for the home table out of a a filter on the target object.

Methods inherited from interface uk.ac.ed.epcc.webapp.jdbc.expr.SQLValue

add, getParameters, getRequiredFilter, makeObject

Methods inherited from interface uk.ac.ed.epcc.webapp.jdbc.expr.FilterProvider

getFilter, getFilterType, getNullFilter, getOrderFilter

Methods inherited from interface uk.ac.ed.epcc.webapp.Targetted

getTarget

Method Detail

getSQLFilter

SQLFilter<T> getSQLFilter(SQLFilter<I> fil)
                   throws CannotFilterException

Create a filter for the home table out of a a filter on the target object. This adds any necessary join filters. If fil is null it only returns the necessary join filter.

Parameters:

fil -

Returns:

SQLFilter

Throws:

CannotFilterException

getFactory

DataObjectFactory<I> getFactory()
                         throws java.lang.Exception

get the remote DataObjectFactory

Returns:

DataObjectFactory

Throws:

java.lang.Exception

getIDExpression

SQLExpression<java.lang.Integer> getIDExpression()

Get a Integer valued SQLExpression for the id of the referenced value. This is used to provide match filters for two references.

Returns:

SQLExpression