org.vedantatree.expressionoasis.expressions

Class BooleanExpression

java.lang.Object

org.vedantatree.expressionoasis.expressions.BooleanExpression

All Implemented Interfaces:

Expression

public class BooleanExpression
extends Object
implements Expression

This class expression is used to make the boolean value expression It gives the boolean value.

Version:

1.0 Modified to support visitor design pattern., 1.1

Author:

Mohit Gupta, Parmod Kamboj, Kris Marwood

Constructor Summary

Constructors

Constructor and Description
BooleanExpression()

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).
Type	getReturnType() Returns the boolean type.
ValueObject	getValue() Gets the value object for boolean value.
void	initialize(ExpressionContext expressionContext, Object objectInfo, boolean validate) Initializes the boolean value object.
String	toString()
void	uninitialize(ExpressionContext expressionContext) Uninitaizes the expression

Methods inherited from class java.lang.Object

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

Constructor Detail

BooleanExpression

public BooleanExpression()

Method Detail

getValue

public ValueObject getValue()
                     throws ExpressionEngineException

Gets the value object for boolean value.

Specified by:

getValue in interface Expression

Returns:

the value of expression (after expression evaluation)

Throws:

ExpressionEngineException - if there is any problem during execution

See Also:

Expression.getValue()

getReturnType

public Type getReturnType()
                   throws ExpressionEngineException

Returns the boolean type.

Specified by:

getReturnType in interface Expression

Returns:

the type of expression

Throws:

ExpressionEngineException - If there is any problem during execution

See Also:

Expression.getReturnType()

initialize

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

Initializes the boolean value object.

Specified by:

initialize in interface Expression

Parameters:

expressionContext - contextual information, may help in initialization

objectInfo - 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)

uninitialize

public void uninitialize(ExpressionContext expressionContext)

Uninitaizes the 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)