org.teiid.query.sql.symbol
Class WindowFunction

java.lang.Object
  org.teiid.query.sql.symbol.Symbol
      org.teiid.query.sql.symbol.SingleElementSymbol
          org.teiid.query.sql.symbol.WindowFunction

All Implemented Interfaces:

java.lang.Cloneable, LanguageObject, Expression, SelectSymbol

public class WindowFunction
extends SingleElementSymbol

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.SingleElementSymbol

SEPARATOR

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

outputName

Constructor Summary

	WindowFunction(java.lang.String name)
protected	WindowFunction(java.lang.String name, java.lang.String canonical)

Method Summary

void	acceptVisitor(LanguageVisitor visitor) Method for accepting a visitor.
WindowFunction	clone() Return a copy of this object.
boolean	equals(java.lang.Object obj) Compare the symbol based ONLY on name.
AggregateSymbol	getFunction()
java.lang.Class<?>	getType() Get the return type of this expression.
WindowSpecification	getWindowSpecification()
int	hashCode() Return a hash code for this symbol.
boolean	isResolved() Returns true if this symbol has been completely resolved with respect to actual runtime metadata.
void	setFunction(AggregateSymbol expression)
void	setWindowSpecification(WindowSpecification windowSpecification)
java.lang.String	toString() Returns string representation of this symbol.

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

getShortName

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

getCanonical, getCanonicalName, getName, getOutputName, getShortCanonicalName, getShortName, setName, setOutputName, setShortCanonicalName, setShortName

Methods inherited from class java.lang.Object

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

Constructor Detail

WindowFunction

public WindowFunction(java.lang.String name)

WindowFunction

protected WindowFunction(java.lang.String name,
                         java.lang.String canonical)

Method Detail

getFunction

public AggregateSymbol getFunction()

setFunction

public void setFunction(AggregateSymbol expression)

getWindowSpecification

public WindowSpecification getWindowSpecification()

setWindowSpecification

public void setWindowSpecification(WindowSpecification windowSpecification)

getType

public java.lang.Class<?> getType()

Description copied from interface: Expression

Get the return type of this expression. This method will not necessarily work right before resolution (Expression.isResolved() returns true).

Returns:

Java class name

isResolved

public boolean isResolved()

Description copied from class: Symbol

Returns true if this symbol has been completely resolved with respect to actual runtime metadata. A resolved symbol has been validated that it refers to actual metadata and will have references to the real metadata IDs if necessary. Different types of symbols determine their resolution in different ways, so this method is abstract and must be implemented by subclasses.

Specified by:

isResolved in interface Expression

Specified by:

isResolved in class Symbol

Returns:

True if resolved with runtime metadata

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.

Parameters:

visitor - Visitor being used

hashCode

public int hashCode()

Description copied from class: Symbol

Return a hash code for this symbol.

Overrides:

hashCode in class Symbol

Returns:

Hash code

equals

public boolean equals(java.lang.Object obj)

Description copied from class: Symbol

Compare the symbol based ONLY on name. Symbols are not compared based on their underlying physical metadata IDs but rather on their representation in the context of a particular query. Case is not important when comparing symbol names.

Overrides:

equals in class Symbol

Parameters:

obj - Other object

Returns:

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

clone

public WindowFunction clone()

Description copied from class: Symbol

Return a copy of this object.

Specified by:

clone in interface LanguageObject

Specified by:

clone in class Symbol

Returns:

Deep clone of this object

toString

public java.lang.String toString()

Description copied from class: Symbol

Returns string representation of this symbol.

Overrides:

toString in class Symbol

Returns:

String representing the symbol