Package com.evolveum.midpoint.repo.common.expression

Interface ExpressionEvaluator<V extends PrismValue>

All Known Implementing Classes:

AbstractExpressionEvaluator, AbstractSearchExpressionEvaluator, AbstractValueTransformationExpressionEvaluator, AsIsExpressionEvaluator, AssociationFromLinkExpressionEvaluator, ConstExpressionEvaluator, FilterExpressionEvaluator, FunctionExpressionEvaluator, GenerateExpressionEvaluator, LiteralExpressionEvaluator, PathExpressionEvaluator, ProportionalExpressionEvaluator, ReferenceAttributeFromLinkExpressionEvaluator, ReferenceSearchExpressionEvaluator, ScriptExpressionEvaluator, SequentialValueExpressionEvaluator

public interface ExpressionEvaluator<V extends PrismValue>

Represents an expression evaluator (e.g. literal, path, script, assignmentTargetSearch, etc). Can apply it in given evaluation context. The evaluators were originally stateless; but they are created anew for each expression evaluation (at least when evaluated as part of mappings evaluation), so we can afford to keep some state in them - as needed for (experimental) doesVetoTargetValueRemoval(PrismValue, OperationResult) method invocation.

Author:

Radovan Semancik

Method Summary

Modifier and Type	Method	Description
default boolean	doesVetoTargetValueRemoval(V value, @NotNull OperationResult result)
PrismValueDeltaSetTriple<V>	evaluate(ExpressionEvaluationContext context, OperationResult result)	Executes the evaluation in a given context.
QName	getElementName()	Fully qualified name of the element defining the expression (e.g. c:path).
String	shortDebugDump()	Short characterization of the evaluator.

Method Details

evaluate

PrismValueDeltaSetTriple<V> evaluate(ExpressionEvaluationContext context,
 OperationResult result)
                              throws SchemaException,
ExpressionEvaluationException,
ObjectNotFoundException,
CommunicationException,
ConfigurationException,
SecurityViolationException

Executes the evaluation in a given context. The context provides necessary data, evaluator provides definition of processing that should be carried out.

Returns:

Result of the evaluation in the form of delta set triple (i.e. added, deleted, unchanged values).

Throws:

SchemaException

ExpressionEvaluationException

ObjectNotFoundException

CommunicationException

ConfigurationException

SecurityViolationException

getElementName

QName getElementName()

Fully qualified name of the element defining the expression (e.g. c:path).

shortDebugDump

String shortDebugDump()

Short characterization of the evaluator. One line, often only a single word.

doesVetoTargetValueRemoval

default boolean doesVetoTargetValueRemoval(@NotNull
 V value,
 @NotNull
 @NotNull OperationResult result)