Package com.aquima.interactions.rule.parser

Class Expression

java.lang.Object

com.aquima.interactions.rule.parser.Expression

All Implemented Interfaces:

IExpression, Serializable

Direct Known Subclasses:

Condition

public class Expression
extends Object
implements IExpression

This class holds a single expression.

Since:

5.0

Author:

O. Kerpershoek

See Also:

• Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Expression(IExpr expr)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
IValue	evaluateWith(InferenceContext context)	This method will evaluate the expression and return the result as a value object.
DataType	getDataType()	This method will return the expected output data type of the expression.
String	getExpression()	This method return the original (unparsed) expression.
protected IExpr	getExpressionObj()
String	getResultTypeName()
String[]	getScopeObjects()	Returns a list of the entity names which could be used as root scope during expression evaluation.
int	hashCode()
boolean	isMultivalue()	Returns whether the output of the expression is a list.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

Expression

protected Expression(IExpr expr)

Method Details

getExpressionObj

protected IExpr getExpressionObj()

getExpression

public String getExpression()

Description copied from interface: IExpression

This method return the original (unparsed) expression.

Specified by:

getExpression in interface IExpression

Returns:

String containing the original expression.

getScopeObjects

public String[] getScopeObjects()

Description copied from interface: IExpression

Returns a list of the entity names which could be used as root scope during expression evaluation. This does not necessarily mean these scope objects will be used. All returned scope objects are lowercase, since the expression evaluator is case-insensitive it sees them as lowercase.

Specified by:

getScopeObjects in interface IExpression

Returns:

Never null

getResultTypeName

public String getResultTypeName()

evaluateWith

public IValue evaluateWith(InferenceContext context)

Description copied from interface: IExpression

This method will evaluate the expression and return the result as a value object.

Specified by:

evaluateWith in interface IExpression

Parameters:

context - object containing the objects that are visible for the expression.

Returns:

Value object with the result of the expression.

getDataType

public DataType getDataType()

Description copied from interface: IExpression

This method will return the expected output data type of the expression. Never null but in some cases it can be DataType.ANY if it is unknown.

Specified by:

getDataType in interface IExpression

Returns:

DataType

isMultivalue

public boolean isMultivalue()

Description copied from interface: IExpression

Returns whether the output of the expression is a list.

Specified by:

isMultivalue in interface IExpression

Returns:

boolean

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object