Package org.eclipse.core.expressions

Class EvaluationResult

java.lang.Object

org.eclipse.core.expressions.EvaluationResult

public class EvaluationResult
extends Object

An evaluation result represents the result of an expression evaluation. There are exact three instances of evaluation result. They are: FALSE, TRUE and NOT_LOADED. NOT_LOADED represents the fact that an expression couldn't be evaluated since a plug-in providing certain test expressions isn't loaded yet.

In addition the class implements the three operation and , or and not. The operation are defined as follows:

The AND operation:

AND	FALSE	TRUE	NOT_LOADED
FALSE	FALSE	FALSE	FALSE
TRUE	FALSE	TRUE	NOT_LOADED
NOT_LOADED	FALSE	NOT_LOADED	NOT_LOADED

The OR operation:

OR	FALSE	TRUE	NOT_LOADED
FALSE	FALSE	TRUE	NOT_LOADED
TRUE	TRUE	TRUE	TRUE
NOT_LOADED	NOT_LOADED	TRUE	NOT_LOADED

The NOT operation:

NOT	FALSE	TRUE	NOT_LOADED
	TRUE	FALSE	NOT_LOADED

The class is not intended to be subclassed by clients.

Since:

3.0

Restriction:

This class is not intended to be subclassed by clients.

Field Summary

Fields

Modifier and Type	Field	Description
static EvaluationResult	FALSE	The evaluation result representing the value FALSE
static EvaluationResult	NOT_LOADED	The evaluation result representing the value NOT_LOADED
static EvaluationResult	TRUE	The evaluation result representing the value TRUE

Method Summary

Modifier and Type	Method	Description
EvaluationResult	and(EvaluationResult other)	Returns an EvaluationResult whose value is this && other).
EvaluationResult	not()	Returns the inverted value of this evaluation result
EvaluationResult	or(EvaluationResult other)	Returns an EvaluationResult whose value is this || other).
String	toString()	For debugging purpose only
static EvaluationResult	valueOf(boolean b)	Returns an evaluation result instance representing the given boolean value.
static EvaluationResult	valueOf(Boolean b)	Returns a evaluation result instance representing the given Boolean value.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

FALSE

public static final EvaluationResult FALSE

The evaluation result representing the value FALSE

TRUE

public static final EvaluationResult TRUE

The evaluation result representing the value TRUE

NOT_LOADED

public static final EvaluationResult NOT_LOADED

The evaluation result representing the value NOT_LOADED

Method Detail

and

public EvaluationResult and(EvaluationResult other)

Returns an EvaluationResult whose value is this && other).

Parameters:

other - the right hand side of the and operation.

Returns:

this && other as defined by the evaluation result

or

public EvaluationResult or(EvaluationResult other)

Returns an EvaluationResult whose value is this || other).

Parameters:

other - the right hand side of the or operation.

Returns:

this || other as defined by the evaluation result

not

public EvaluationResult not()

Returns the inverted value of this evaluation result

Returns:

the inverted value of this evaluation result

valueOf

public static EvaluationResult valueOf(boolean b)

Returns an evaluation result instance representing the given boolean value. If the given boolean value is true then ExpressionResult.TRUE is returned. If the value is false then ExpressionResult.FALSE is returned.

Parameters:

b - a boolean value

Returns:

the expression result representing the boolean value

valueOf

public static EvaluationResult valueOf(Boolean b)

Returns a evaluation result instance representing the given Boolean value. If the given Boolean value is true then ExpressionResult.TRUE is returned. If the value is false then ExpressionResult.FALSE is returned.

Parameters:

b - a Boolean value

Returns:

the expression result representing the Boolean value

toString

public String toString()

For debugging purpose only

Overrides:

toString in class Object

Returns:

a string representing this object. The result is not human readable