org.vedantatree.expressionoasis.expressions

Class UnaryOperatorExpression

java.lang.Object

org.vedantatree.expressionoasis.expressions.UnaryOperatorExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

BWComplementExpression, FunctionExpression, MinusExpression, MulExpression, NotExpression, ParanthesisExpression, PlusExpression, SumExpression, UnaryPropertyExpression

public abstract class UnaryOperatorExpression
extends Object
implements Expression

This class defines the abstract implementation of unary operator expression.

Version:

1.0 Modified to support visitor design pattern., 1.1

Author:

Parmod Kamboj, Mohit Gupta, Kris Marwood

Constructor Summary

Constructors

Constructor and Description
UnaryOperatorExpression()

Method Summary

Modifier and Type	Method and Description
void	accept(ExpressionVisitor visitor) Allows an expression visitor to visit this expression and it's sub-expressions (implements Visitor design pattern).
Expression	getOperandExpression() Gets the operand expression for this unary operator
Type	getReturnType() Gets the return type of the expression.
void	initialize(ExpressionContext expressionContext, Object parameters, boolean validate) Initializes the operand expression.
String	toString()
void	uninitialize(ExpressionContext expressionContext) Uninitializes the unary operator expression.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.vedantatree.expressionoasis.expressions.Expression

getValue

Constructor Detail

UnaryOperatorExpression

public UnaryOperatorExpression()

Method Detail

initialize

public void initialize(ExpressionContext expressionContext,
                       Object parameters,
                       boolean validate)
                throws ExpressionEngineException

Initializes the operand expression.

Specified by:

initialize in interface Expression

Parameters:

expressionContext - contextual information, may help in initialization

parameters - for example, sub expressions and identifiers

Throws:

ExpressionEngineException - if there is any problem during execution

See Also:

org.vedantatree.expressionoasis.expressions.Expression#initialize(org.vedantatree.expressionoasis.ExpressionContext, java.lang.Object)

getOperandExpression

public Expression getOperandExpression()

Gets the operand expression for this unary operator

Returns:

Returns the operandExpression.

getReturnType

public Type getReturnType()
                   throws ExpressionEngineException

Description copied from interface: Expression

Gets the return type of the expression.

Specified by:

getReturnType in interface Expression

Returns:

the type of expression

Throws:

ExpressionEngineException - If there is any problem during execution

See Also:

Expression.getReturnType()

uninitialize

public void uninitialize(ExpressionContext expressionContext)

Uninitializes the unary operator expression.

Specified by:

uninitialize in interface Expression

Parameters:

expressionContext - contextual information, may help in un-initialization

See Also:

Expression.uninitialize(org.vedantatree.expressionoasis.ExpressionContext)

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()

accept

public void accept(ExpressionVisitor visitor)

Allows an expression visitor to visit this expression and it's sub-expressions (implements Visitor design pattern).

Specified by:

accept in interface Expression

Parameters:

visitor - a visitor object that this expression must visit when accept is called.

See Also:

org.vedantatree.expressionoasis.expressions.Expression#accept(org.vedantatree.expressionoasis.ExpressionVisitor)