Package 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.

Constructor Summary

Constructors

Constructor	Description
UnaryOperatorExpression()

Method Summary

Modifier and Type	Method	Description
void	accept(ExpressionVisitor visitor)	Allows an expression visitor to visit this expression and it's sub-expressions (implements Visitor design pattern).
protected static void	addTypePair(Class clazz, Type operandType, Type resultType)	Adds the type mapping for the given operand type and its expected result type for a operator.
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.
protected void	validate(ExpressionContext expressionContext)	Validates the expression.

Methods inherited from class java.lang.Object

clone, equals, finalize, 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)

validate

protected void validate(ExpressionContext expressionContext)
                 throws ExpressionEngineException

Validates the expression.

Parameters:

expressionContext -

Throws:

ExpressionEngineException

addTypePair

protected static final void addTypePair(Class clazz,
                                        Type operandType,
                                        Type resultType)

Adds the type mapping for the given operand type and its expected result type for a operator.

Parameters:

clazz - class of the operator

operandType - type of operand

resultType - type of the result

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:

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