Add collectAssignedFocusMappingsResults() method

This is to be used to implement non-tolerant focus mappings
induced by assignments (as opposed to those present in object
template).

model/model-api/src/main/java/com/evolveum/midpoint/model/api/expr/MidpointFunctions.java

@@ -23,6 +23,8 @@
 import javax.xml.namespace.QName;
 
 import com.evolveum.midpoint.prism.Item;
+import com.evolveum.midpoint.prism.PrismValue;
+import com.evolveum.midpoint.prism.path.ItemPath;
 import com.evolveum.midpoint.util.LocalizableMessage;
 import com.evolveum.midpoint.xml.ns._public.common.common_3.*;
 import org.jetbrains.annotations.NotNull;
@@ -1129,4 +1131,12 @@ Object executeAdHocProvisioningScript(String resourceOid, String language, Strin
 	 */
 	Boolean isEvaluateNew();
 
+	/**
+	 * Returns all non-negative values from all focus mappings (targeted to given path)
+	 * from all non-negative evaluated assignments.
+	 *
+	 * Highly experimental. Use at your own risk.
+	 */
+	@NotNull
+	Collection<PrismValue> collectAssignedFocusMappingsResults(@NotNull ItemPath path) throws SchemaException;
 }

model/model-impl/src/main/java/com/evolveum/midpoint/model/impl/expr/MidpointFunctionsImpl.java

@@ -32,6 +32,7 @@
 import com.evolveum.midpoint.model.api.expr.MidpointFunctions;
 import com.evolveum.midpoint.model.common.ConstantsManager;
 import com.evolveum.midpoint.model.common.expression.script.ScriptExpressionEvaluationContext;
+import com.evolveum.midpoint.model.common.mapping.Mapping;
 import com.evolveum.midpoint.model.impl.ModelObjectResolver;
 import com.evolveum.midpoint.model.impl.lens.EvaluatedAssignmentImpl;
 import com.evolveum.midpoint.model.impl.lens.LensContext;
@@ -41,10 +42,7 @@
 import com.evolveum.midpoint.prism.*;
 import com.evolveum.midpoint.prism.crypto.EncryptionException;
 import com.evolveum.midpoint.prism.crypto.Protector;
-import com.evolveum.midpoint.prism.delta.ChangeType;
-import com.evolveum.midpoint.prism.delta.DeltaSetTriple;
-import com.evolveum.midpoint.prism.delta.ItemDelta;
-import com.evolveum.midpoint.prism.delta.ObjectDelta;
+import com.evolveum.midpoint.prism.delta.*;
 import com.evolveum.midpoint.prism.marshaller.ItemPathHolder;
 import com.evolveum.midpoint.prism.match.DefaultMatchingRule;
 import com.evolveum.midpoint.prism.match.PolyStringOrigMatchingRule;
@@ -100,6 +98,7 @@
 import static com.evolveum.midpoint.schema.util.LocalizationUtil.toLocalizableMessage;
 import static com.evolveum.midpoint.schema.util.ObjectTypeUtil.createObjectRef;
 import static com.evolveum.midpoint.xml.ns._public.common.common_3.TaskExecutionStatusType.RUNNABLE;
+import static java.util.Collections.emptySet;
 import static java.util.Collections.singleton;
 
 /**
@@ -1647,4 +1646,29 @@ public Boolean isEvaluateNew() {
 		}
 		return scriptContext.isEvaluateNew();
 	}
+
+	@Override
+	@NotNull
+	public Collection<PrismValue> collectAssignedFocusMappingsResults(@NotNull ItemPath path) throws SchemaException {
+		LensContext<ObjectType> lensContext = ModelExpressionThreadLocalHolder.getLensContext();
+		if (lensContext == null) {
+			throw new IllegalStateException("No lensContext");
+		}
+		DeltaSetTriple<EvaluatedAssignmentImpl<?>> evaluatedAssignmentTriple = lensContext.getEvaluatedAssignmentTriple();
+		if (evaluatedAssignmentTriple == null) {
+			return emptySet();
+		}
+		Collection<PrismValue> rv = new HashSet<>();
+		for (EvaluatedAssignmentImpl<?> evaluatedAssignment : evaluatedAssignmentTriple.getNonNegativeValues()) {
+			for (Mapping<?, ?> mapping : evaluatedAssignment.getFocusMappings()) {
+				if (path.equivalent(mapping.getOutputPath())) {
+					PrismValueDeltaSetTriple<?> outputTriple = mapping.getOutputTriple();
+					if (outputTriple != null) {
+						rv.addAll(outputTriple.getNonNegativeValues());
+					}
+				}
+			}
+		}
+		return rv;
+	}
 }