org.hibernate.hql.ast.tree
Interface SelectExpression

All Known Implementing Classes:

AbstractSelectExpression, AggregateNode, BinaryArithmeticOperatorNode, BooleanLiteralNode, Case2Node, CaseNode, CollectionFunction, ConstructorNode, CountNode, DotNode, FromReferenceNode, IdentNode, IndexNode, LiteralNode, MethodNode, QueryNode, SelectExpressionImpl, UnaryArithmeticNode

public interface SelectExpression

Represents an element of a projection list, i.e. a select expression.

Author:

josh Sep 21, 2004 9:00:13 PM

Method Summary

String	getAlias()
Type	getDataType() Returns the data type of the select expression.
FromElement	getFromElement() Returns the FROM element that this expression refers to.
boolean	isConstructor() Returns true if the element is a constructor (e.g.
boolean	isReturnableEntity() Returns true if this select expression represents an entity that can be returned.
boolean	isScalar()
void	setAlias(String alias)
void	setScalarColumnText(int i) Appends AST nodes that represent the columns after the current AST node.
void	setText(String text) Sets the text of the node.

Method Detail

getDataType

Type getDataType()

Returns the data type of the select expression.

Returns:

The data type of the select expression.

setScalarColumnText

void setScalarColumnText(int i)
                         throws antlr.SemanticException

Appends AST nodes that represent the columns after the current AST node. (e.g. 'as col0_O_')

Parameters:

i - The index of the select expression in the projection list.

Throws:

antlr.SemanticException

getFromElement

FromElement getFromElement()

Returns the FROM element that this expression refers to.

Returns:

The FROM element.

isConstructor

boolean isConstructor()

Returns true if the element is a constructor (e.g. new Foo).

Returns:

true if the element is a constructor (e.g. new Foo).

isReturnableEntity

boolean isReturnableEntity()
                           throws antlr.SemanticException

Returns true if this select expression represents an entity that can be returned.

Returns:

true if this select expression represents an entity that can be returned.

Throws:

antlr.SemanticException

setText

void setText(String text)

Sets the text of the node.

Parameters:

text - the new node text.

isScalar

boolean isScalar()
                 throws antlr.SemanticException

Throws:

antlr.SemanticException

setAlias

void setAlias(String alias)

getAlias

String getAlias()