org.eigenbase.sql
Class SqlOperandCountRange

java.lang.Object
  org.eigenbase.sql.SqlOperandCountRange

public class SqlOperandCountRange
extends Object

A class that describes how many operands an operator can take.

Version:

$Id: //open/dev/farrago/src/org/eigenbase/sql/SqlOperandCountRange.java#9 $

Author:

Wael Chatila

Field Summary

static SqlOperandCountRange	Four
private boolean	isVariadic
static SqlOperandCountRange	One
static SqlOperandCountRange	OneOrTwo
private List<Integer>	possibleList
static SqlOperandCountRange	Three
static SqlOperandCountRange	ThreeOrFour
static SqlOperandCountRange	Two
static SqlOperandCountRange	TwoOrThree
static SqlOperandCountRange	Variadic
static SqlOperandCountRange	Zero
static SqlOperandCountRange	ZeroOrOne

Constructor Summary

private	SqlOperandCountRange() This constructor should only be called internally from this class and only when creating a variadic count descriptor
	SqlOperandCountRange(int count)
private	SqlOperandCountRange(Integer[] possibleCounts)
	SqlOperandCountRange(int count1, int count2)
	SqlOperandCountRange(int count1, int count2, int count3)
	SqlOperandCountRange(List<Integer> list)

Method Summary

List<Integer>	getAllowedList() Returns a list of allowed operand counts for a non-variadic operator.
boolean	isVariadic()

Methods inherited from class java.lang.Object

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

Field Detail

Variadic

public static final SqlOperandCountRange Variadic

Zero

public static final SqlOperandCountRange Zero

ZeroOrOne

public static final SqlOperandCountRange ZeroOrOne

One

public static final SqlOperandCountRange One

OneOrTwo

public static final SqlOperandCountRange OneOrTwo

Two

public static final SqlOperandCountRange Two

TwoOrThree

public static final SqlOperandCountRange TwoOrThree

Three

public static final SqlOperandCountRange Three

ThreeOrFour

public static final SqlOperandCountRange ThreeOrFour

Four

public static final SqlOperandCountRange Four

possibleList

private List<Integer> possibleList

isVariadic

private boolean isVariadic

Constructor Detail

SqlOperandCountRange

private SqlOperandCountRange()

This constructor should only be called internally from this class and only when creating a variadic count descriptor

SqlOperandCountRange

private SqlOperandCountRange(Integer[] possibleCounts)

SqlOperandCountRange

public SqlOperandCountRange(int count)

SqlOperandCountRange

public SqlOperandCountRange(List<Integer> list)

SqlOperandCountRange

public SqlOperandCountRange(int count1,
                            int count2)

SqlOperandCountRange

public SqlOperandCountRange(int count1,
                            int count2,
                            int count3)

Method Detail

getAllowedList

public List<Integer> getAllowedList()

Returns a list of allowed operand counts for a non-variadic operator.

Returns:

unmodifiable list of Integer

"Precondition:"

!isVariadic()

isVariadic

public boolean isVariadic()

Returns:

true if any number of operands is allowed