org.eigenbase.sql.util
Class ReflectiveSqlOperatorTable

java.lang.Object
  org.eigenbase.sql.util.ReflectiveSqlOperatorTable

All Implemented Interfaces:

SqlOperatorTable

Direct Known Subclasses:

SqlStdOperatorTable

public abstract class ReflectiveSqlOperatorTable
extends Object
implements SqlOperatorTable

ReflectiveSqlOperatorTable implements the SqlOperatorTable interface by reflecting the public fields of a subclass.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/util/ReflectiveSqlOperatorTable.java#16 $

Author:

John V. Sichi

Field Summary

private Map<String,SqlOperator>	mapNameToOp
private MultiMap<String,SqlOperator>	operators

Constructor Summary

protected

ReflectiveSqlOperatorTable()

Method Summary

List<SqlOperator>	getOperatorList() Retrieves a list of all functions and operators in this table.
void	init() Performs post-constructor initialization of an operator table.
List<SqlOperator>	lookupOperatorOverloads(SqlIdentifier opName, SqlFunctionCategory category, SqlSyntax syntax) Retrieves a list of operators with a given name and syntax.
void	register(SqlFunction function) Registers a function in the table.
void	register(SqlOperator op)

Methods inherited from class java.lang.Object

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

Field Detail

operators

private final MultiMap<String,SqlOperator> operators

mapNameToOp

private final Map<String,SqlOperator> mapNameToOp

Constructor Detail

ReflectiveSqlOperatorTable

protected ReflectiveSqlOperatorTable()

Method Detail

init

public final void init()

Performs post-constructor initialization of an operator table. It can't be part of the constructor, because the subclass constructor needs to complete first.

lookupOperatorOverloads

public List<SqlOperator> lookupOperatorOverloads(SqlIdentifier opName,
                                                 SqlFunctionCategory category,
                                                 SqlSyntax syntax)

Description copied from interface: SqlOperatorTable

Retrieves a list of operators with a given name and syntax. For example, by passing SqlSyntax.Function, the returned list is narrowed to only matching SqlFunction objects.

Specified by:

lookupOperatorOverloads in interface SqlOperatorTable

Parameters:

opName - name of operator

category - function category to look up, or null for any matching operator

syntax - syntax type of operator

Returns:

mutable list of SqlOperator objects (or immutable empty list if no matches)

register

public void register(SqlOperator op)

register

public void register(SqlFunction function)

Registers a function in the table.

Parameters:

function - Function to register

getOperatorList

public List<SqlOperator> getOperatorList()

Description copied from interface: SqlOperatorTable

Retrieves a list of all functions and operators in this table. Used for automated testing.

Specified by:

getOperatorList in interface SqlOperatorTable

Returns:

list of SqlOperator objects