org.vedantatree.expressionoasis.expressions

Class BinaryOperatorExpression

java.lang.Object

org.vedantatree.expressionoasis.expressions.BinaryOperatorExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

AddExpression, AndExpression, ArgumentExpression, ArrayIndexExpression, BWAndExpression, BWOrExpression, BWSignedLeftShiftExpression, BWSignedRightShiftExpression, BWUnsignedRightShiftExpression, BWXorExpression, ConditionTernaryExpression, ContainsExpression, DivideExpression, EndsWithExpression, EQExpression, GTEExpression, LTEExpression, MultiplyExpression, OrExpression, PropertyExpression, RemainderExpression, ResultTernaryExpression, StartsWithExpression, SubtractExpression

public abstract class BinaryOperatorExpression
extends Object
implements Expression

This class defines the abstract implemenation for binary operator expression.

Version:

1.0 Modified to support visitor design pattern. Also replaced usage of Hashtable with HashMap for performance improvement as synchronization shouldn't be required., 1.1

Author:

Parmod Kamboj, Mohit Gupta, Kris Marwood

Constructor Summary

Constructors

Constructor and Description
BinaryOperatorExpression()

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	getLeftOperandExpression() Gets the value of leftOperandExpression.
Type	getReturnType() Gets the return type of the expression.
Expression	getRightOperandExpression() Gets the value of rightOperandExpression.
ValueObject	getValue() Executes and returns the value of this expression.
void	initialize(ExpressionContext expressionContext, Object parameters, boolean validate) Initializes the child expressions.
String	toString()
void	uninitialize(ExpressionContext expressionContext) Uninitializes the binary expression.

Methods inherited from class java.lang.Object

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

Constructor Detail

BinaryOperatorExpression

public BinaryOperatorExpression()

Method Detail

initialize

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

Initializes the child expressions.

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)

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()

getLeftOperandExpression

public Expression getLeftOperandExpression()

Gets the value of leftOperandExpression.

Returns:

Returns the leftOperandExpression.

getRightOperandExpression

public Expression getRightOperandExpression()

Gets the value of rightOperandExpression.

Returns:

Returns the rightOperandExpression.

uninitialize

public void uninitialize(ExpressionContext expressionContext)

Uninitializes the binary 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)

getValue

public ValueObject getValue()
                     throws ExpressionEngineException

Description copied from interface: Expression

Executes and returns the value of this expression. If expression is not at node level, it will further evaluate its related expression which may represents operands or operators and return the final outcome.

Specified by:

getValue in interface Expression

Returns:

the value of expression (after expression evaluation)

Throws:

ExpressionEngineException - if there is any problem during execution