org.teatrove.tea.parsetree
Class NegateExpression

java.lang.Object
  org.teatrove.tea.parsetree.Node
      org.teatrove.tea.parsetree.Expression
          org.teatrove.tea.parsetree.NegateExpression

All Implemented Interfaces:

Serializable, Cloneable

public class NegateExpression
extends Expression

NegateExpression is a simple unary expression that calculates the negative value of an expression. The expression it operates on must return a Number type.

Author:

Brian S O'Neill

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.teatrove.tea.parsetree.Expression

Expression.Conversion

Constructor Summary

NegateExpression(SourceInfo info, Expression expr)

Method Summary

Object	accept(NodeVisitor visitor) Every subclass of Node must override this method with the following: return visitor.visit(this).
Object	clone() Returns a clone of this Node and all its children.
Expression	getExpression()
boolean	isExceptionPossible() Returns true if an exception can be thrown while executing this Expression.
void	setExpression(Expression expr)
void	setType(Type type) Sets the type of this expression, clearing the conversion chain.

Methods inherited from class org.teatrove.tea.parsetree.Expression

convertTo, convertTo, forceConversion, getConversionChain, getInitialType, getType, getValue, isValueKnown, setInitialType

Methods inherited from class org.teatrove.tea.parsetree.Node

getSourceInfo, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

NegateExpression

public NegateExpression(SourceInfo info,
                        Expression expr)

Method Detail

accept

public Object accept(NodeVisitor visitor)

Description copied from class: Node

Every subclass of Node must override this method with the following: return visitor.visit(this).

Overrides:

accept in class Expression

Parameters:

visitor - A visitor of this Node

Returns:

Node The Node returned by the visitor

See Also:

NodeVisitor

clone

public Object clone()

Description copied from class: Node

Returns a clone of this Node and all its children. Immutable child objects are not necessarily cloned

Overrides:

clone in class Expression

isExceptionPossible

public boolean isExceptionPossible()

Description copied from class: Expression

Returns true if an exception can be thrown while executing this Expression. By default, returns true only if a type conversion could cause an exception.

Overrides:

isExceptionPossible in class Expression

setType

public void setType(Type type)

Description copied from class: Expression

Sets the type of this expression, clearing the conversion chain.

Overrides:

setType in class Expression

getExpression

public Expression getExpression()

setExpression

public void setExpression(Expression expr)