Package com.aquima.interactions.expressions.r7

Class ExpressionR7

java.lang.Object

com.aquima.interactions.expressions.r7.ExpressionR7

All Implemented Interfaces:

IExpr, Serializable

public class ExpressionR7
extends Object
implements IExpr

The expression class holds the parsed and checked expression. The class can return information on the expression, scoped objects and type.

Since:

6.4

Author:

F. van der Meer

See Also:

• Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	ExpressionR7(String expression, Type resultType, String[] scopedObjects, IExpressionNode optimizedTree)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
IValue	evaluate(IValueSource source)	This method will evaluate the expression for the context (source) provided.
String	getExpression()	This method will return the original expression string from which the expression was parsed.
DataType	getResultType()	This method will return the data type of the result.
String[]	getScopeObjects()	Returns the root variables which are used from the profile.
String	getTypeName()	Returns the type name of the result type.
int	hashCode()
boolean	isMultivalue()	This method will return a boolean indicating if the result of an evaluation of the expression may contain multiple values.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

ExpressionR7

protected ExpressionR7(String expression,
 Type resultType,
 String[] scopedObjects,
 IExpressionNode optimizedTree)

Method Details

getExpression

public String getExpression()

Description copied from interface: IExpr

This method will return the original expression string from which the expression was parsed.

Specified by:

getExpression in interface IExpr

Returns:

The original expression string.

isMultivalue

public boolean isMultivalue()

Description copied from interface: IExpr

This method will return a boolean indicating if the result of an evaluation of the expression may contain multiple values. Expression which can result in multiple values, will always return a list value as result.

Specified by:

isMultivalue in interface IExpr

Returns:

Boolean indicating if the result can consist of multiple values.

getResultType

public DataType getResultType()

Description copied from interface: IExpr

This method will return the data type of the result.

Specified by:

getResultType in interface IExpr

Returns:

the data type of the result.

getTypeName

public String getTypeName()

Description copied from interface: IExpr

Returns the type name of the result type. This type can either be the entity's name or the domain's name, or null when the value isn't bound to a specific type.

Specified by:

getTypeName in interface IExpr

Returns:

the type name of the result type.

getScopeObjects

public String[] getScopeObjects()

Description copied from interface: IExpr

Returns the root variables which are used from the profile. When the expression does not use any scoped objects, this method will return an empty array.

Specified by:

getScopeObjects in interface IExpr

Returns:

Array containing the names of the objects that need to be in scope.

evaluate

public IValue evaluate(IValueSource source)

Description copied from interface: IExpr

This method will evaluate the expression for the context (source) provided.
Note: This method might return a null value indicating the result of the expression is unknown. TODO When an expression exception is throw, add as much information on how the evaluation was proceeding until the exception occurred. used values etc. for debugging. instead of tons of logging IF a THEN b<null value unexpected> ELSE c

Specified by:

evaluate in interface IExpr

Parameters:

source - Object containing context information that should be used during evaluation.

Returns:

The result of the expression.

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