Package org.teiid.query.sql.symbol

Class ExpressionSymbol

java.lang.Object

org.teiid.query.sql.symbol.Symbol

org.teiid.query.sql.symbol.ExpressionSymbol

All Implemented Interfaces:

Cloneable, LanguageObject, DerivedExpression, Expression

public class ExpressionSymbol
extends Symbol
implements DerivedExpression

Nested Class Summary

Nested classes/interfaces inherited from interface org.teiid.query.sql.LanguageObject

LanguageObject.Util

Field Summary

Fields inherited from class org.teiid.query.sql.symbol.Symbol

outputName, SEPARATOR

Constructor Summary

Constructors

Constructor	Description
ExpressionSymbol(String name, Expression expression)	Construct an ExpressionSymbol with name and expression.

Method Summary

Modifier and Type	Method	Description
void	acceptVisitor(LanguageVisitor visitor)	Method for accepting a visitor.
Object	clone()	Return a deep copy of this object
boolean	equals(Object obj)	ExpressionSymbol matching is not based upon the name
Expression	getExpression()	Get the expression for this symbol
Class	getType()	Get the type of the symbol
int	hashCode()	Return a hash code for this symbol.
void	setExpression(Expression expression)	Set the expression represented by this symbol.

Methods inherited from class org.teiid.query.sql.symbol.Symbol

getName, getName, getOutputName, getOutputName, getShortName, getShortName, getShortName, setName, setOutputName, setShortName, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ExpressionSymbol

public ExpressionSymbol(String name,
                        Expression expression)

Construct an ExpressionSymbol with name and expression.

Method Detail

getExpression

public Expression getExpression()

Get the expression for this symbol

Returns:

Expression for this symbol

setExpression

public void setExpression(Expression expression)

Set the expression represented by this symbol.

Parameters:

expression - Expression for this expression symbol

getType

public Class getType()

Get the type of the symbol

Specified by:

getType in interface Expression

Returns:

Type of the symbol, may be null before resolution

acceptVisitor

public void acceptVisitor(LanguageVisitor visitor)

Description copied from interface: LanguageObject

Method for accepting a visitor. It is the responsibility of the language object to call back on the visitor.

Specified by:

acceptVisitor in interface LanguageObject

Parameters:

visitor - Visitor being used

clone

public Object clone()

Return a deep copy of this object

Specified by:

clone in interface LanguageObject

Specified by:

clone in class Symbol

Returns:

Deep copy of this object

hashCode

public int hashCode()

Description copied from class: Symbol

Return a hash code for this symbol.

Overrides:

hashCode in class Symbol

Returns:

Hash code

See Also:

Symbol.hashCode()

equals

public boolean equals(Object obj)

ExpressionSymbol matching is not based upon the name

Overrides:

equals in class Symbol

Parameters:

obj - Other object

Returns:

True if other obj is a Symbol (or subclass) and name is equal

See Also:

Symbol.equals(java.lang.Object)