org.vedantatree.expressionoasis.expressions

Class StringExpression

java.lang.Object

org.vedantatree.expressionoasis.expressions.StringExpression

All Implemented Interfaces:

Expression

public class StringExpression
extends Object
implements Expression

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

Version:

1.0 Modified to support visitor design pattern., 1.1

Author:

Parmod Kamboj, Kris Marwood

Constructor Summary

Constructors

Constructor and Description
StringExpression()

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 string type.
ValueObject	getValue() Gets the value object for string value.
void	initialize(ExpressionContext expressionContext, Object parameters, boolean validate) Initializes the string 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

StringExpression

public StringExpression()

Method Detail

getValue

public ValueObject getValue()
                     throws ExpressionEngineException

Gets the value object for string 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 string 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 parameters,
                       boolean validate)
                throws ExpressionEngineException

Initializes the string value object.

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)

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)