Module com.aoindustries.aoserv.client

Package com.aoindustries.aoserv.client.sql

Interface SqlExpression

All Known Implementing Classes:

SqlCast, SqlColumnJoin, SqlColumnValue, SqlCount

public interface SqlExpression

An expression in used in select statements and internal sorting.

Author:

AO Industries, Inc.

Method Summary

Modifier and Type	Method	Description
default Object	evaluate(AoservConnector conn, AoservObject<?,?> obj)	Evaluates the expression on the given connector and object.
default Object	evaluateAggregate(AoservConnector conn, List<AoservObject<?,?>> rows)	Evaluates the aggregate expression on the given connector and rows.
String	getColumnName()
default void	getReferencedTables(AoservConnector conn, List<Table> tables)	Gets all of the tables referenced by this expression.
Type	getType()	The return type of this expression.
boolean	isAggregate()	Is this an aggregate function?

Method Details

getColumnName

String getColumnName()

evaluate

default Object evaluate(AoservConnector conn,
 AoservObject<?,?> obj)
                 throws IOException,
SQLException

Evaluates the expression on the given connector and object.

Throws:

IOException

SQLException

evaluateAggregate

default Object evaluateAggregate(AoservConnector conn,
 List<AoservObject<?,?>> rows)
                          throws IOException,
SQLException

Evaluates the aggregate expression on the given connector and rows.

Throws:

IOException

SQLException

isAggregate

boolean isAggregate()

Is this an aggregate function? Controls whether evaluation is performed via evaluate(com.aoindustries.aoserv.client.AoservConnector, com.aoindustries.aoserv.client.AoservObject) or evaluateAggregate(com.aoindustries.aoserv.client.AoservConnector, java.util.List). Please be sure to implement the corresponding evaluation function.

getType

Type getType()

The return type of this expression.

getReferencedTables

default void getReferencedTables(AoservConnector conn,
 List<Table> tables)
                          throws IOException,
SQLException

Gets all of the tables referenced by this expression.

Throws:

IOException

SQLException