Make ModelContext really serializable (MID-6890)

While ModelContext was declared serializable, many of its constituents
were, in fact, not. So this commit makes a lot of types/classes really
serializable:

- AbstractConstruction and its subclasses
- EvaluatedAbstractConstruction and its subclasses
- EvaluatedResourceObjectConstruction and its subtypes
- EvaluatedAssignment
- EvaluatedAssignmentTarget
- AssignmentPath
- AssignmentPathSegment
- EvaluationOrder
- AssignmentOrigin
- AssignmentPathVariables
- FocalMappingEvaluationRequest and its subclasses
- ExpressionEvaluatorProfile
- ExpressionPermissionProfile
- ScriptExpressionProfile
- ExpressionProfile
- ItemDeltaItem and subclasses
- Mapping, MappingParser, ConditionState, TimeConstraintsEvaluation

In order to do this:
- ModelBeans are now reachable via static ModelBeans.get() call,
- SchemaService is now reachable via static SchemaService.get() call,
- PrismContext is now reachable via static PrismContext.get() call.

BEHAVIOR CHANGE:
- Mapping state now can contain only serializable values.

infra/prism-api/src/main/java/com/evolveum/midpoint/prism/PrismContext.java

@@ -407,4 +407,7 @@ default PrismQueryLanguageParser createQueryParser() {
 
     PrismQuerySerializer querySerializer();
 
+    static PrismContext get() {
+        return PrismService.get().prismContext();
+    }
 }

infra/prism-api/src/main/java/com/evolveum/midpoint/prism/PrismService.java

@@ -0,0 +1,33 @@
+/*
+ * Copyright (C) 2010-2021 Evolveum and contributors
+ *
+ * This work is dual-licensed under the Apache License 2.0
+ * and European Union Public License. See LICENSE file for details.
+ */
+
+package com.evolveum.midpoint.prism;
+
+/**
+ * Statically holds an instance of PrismContext (and maybe other beans later).
+ */
+public class PrismService {
+
+    private static final PrismService INSTANCE = new PrismService();
+
+    private static PrismContext prismContext;
+
+    private PrismService() {
+    }
+
+    public static PrismService get() {
+        return INSTANCE;
+    }
+
+    public PrismContext prismContext() {
+        return prismContext;
+    }
+
+    public void prismContext(PrismContext prismContext) {
+        PrismService.prismContext = prismContext;
+    }
+}

infra/prism-api/src/main/java/com/evolveum/midpoint/prism/util/ItemDeltaItem.java

@@ -8,6 +8,7 @@
 
 import static com.evolveum.midpoint.prism.path.ItemPath.CompareResult;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Objects;
@@ -33,7 +34,7 @@
  *
  * @author Radovan Semancik
  */
-public class ItemDeltaItem<V extends PrismValue,D extends ItemDefinition> implements DebugDumpable {
+public class ItemDeltaItem<V extends PrismValue,D extends ItemDefinition> implements DebugDumpable, Serializable {
 
     private Item<V,D> itemOld;
     private ItemDelta<V,D> delta;

infra/prism-api/src/main/java/com/evolveum/midpoint/prism/util/PrismAsserts.java

@@ -8,6 +8,7 @@
 
 import java.io.File;
 import java.io.IOException;
+import java.io.Serializable;
 import java.util.*;
 import java.util.stream.Collectors;
 import java.util.stream.Stream;

infra/prism-impl/src/main/java/com/evolveum/midpoint/prism/impl/PrismContextImpl.java

@@ -154,6 +154,8 @@ private PrismContextImpl(@NotNull SchemaRegistryImpl schemaRegistry) {
             // Should not happen
             throw new SystemException(e.getMessage(), e);
         }
+
+        PrismService.get().prismContext(this);
     }
 
     public static PrismContextImpl create(@NotNull SchemaRegistryImpl schemaRegistry) {

infra/schema/src/main/java/com/evolveum/midpoint/schema/SchemaService.java

@@ -6,6 +6,7 @@
  */
 package com.evolveum.midpoint.schema;
 
+import javax.annotation.PostConstruct;
 import javax.xml.namespace.QName;
 
 import org.jetbrains.annotations.NotNull;
@@ -28,6 +29,17 @@ public class SchemaService {
     @Autowired private PrismContext prismContext;
     @Autowired private RelationRegistry relationRegistry;
 
+    private static SchemaService instance;
+
+    @PostConstruct
+    public void init() {
+        instance = this;
+    }
+
+    public static SchemaService get() {
+        return instance;
+    }
+
     public PrismContext prismContext() {
         return prismContext;
     }

infra/schema/src/main/java/com/evolveum/midpoint/schema/expression/ExpressionEvaluatorProfile.java

@@ -6,6 +6,7 @@
  */
 package com.evolveum.midpoint.schema.expression;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -17,7 +18,7 @@
  * @author Radovan Semancik
  *
  */
-public class ExpressionEvaluatorProfile {
+public class ExpressionEvaluatorProfile implements Serializable {
 
     private final QName type;
     private AccessDecision decision;

infra/schema/src/main/java/com/evolveum/midpoint/schema/expression/ExpressionPermissionProfile.java

@@ -6,6 +6,7 @@
  */
 package com.evolveum.midpoint.schema.expression;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -20,7 +21,7 @@
  *
  * @author Radovan Semancik
  */
-public class ExpressionPermissionProfile {
+public class ExpressionPermissionProfile implements Serializable {
 
     private final String identifier;
     private AccessDecision decision;

infra/schema/src/main/java/com/evolveum/midpoint/schema/expression/ExpressionProfile.java

@@ -6,6 +6,7 @@
  */
 package com.evolveum.midpoint.schema.expression;
 
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -20,7 +21,7 @@
  * @author Radovan Semancik
  *
  */
-public class ExpressionProfile { // TODO: DebugDumpable
+public class ExpressionProfile implements Serializable { // TODO: DebugDumpable
 
     private final String identifier;
     private AccessDecision decision;

infra/schema/src/main/java/com/evolveum/midpoint/schema/expression/ScriptExpressionProfile.java

@@ -8,11 +8,13 @@
 
 import com.evolveum.midpoint.schema.AccessDecision;
 
+import java.io.Serializable;
+
 /**
  * @author semancik
  *
  */
-public class ScriptExpressionProfile {
+public class ScriptExpressionProfile implements Serializable {
 
     private final String language;
     private AccessDecision decision;

infra/test-util/src/main/java/com/evolveum/midpoint/test/util/AbstractSpringTest.java

@@ -6,6 +6,7 @@
  */
 package com.evolveum.midpoint.test.util;
 
+import java.io.Serializable;
 import java.lang.reflect.Field;
 import java.lang.reflect.Modifier;
 

infra/test-util/src/main/java/com/evolveum/midpoint/test/util/MidPointAsserts.java

@@ -9,9 +9,12 @@
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.testng.AssertJUnit.*;
 
+import java.io.Serializable;
 import java.util.Collection;
 import javax.xml.namespace.QName;
 
+import com.evolveum.midpoint.util.SerializationUtil;
+
 import org.apache.commons.lang.StringUtils;
 import org.testng.AssertJUnit;
 
@@ -111,4 +114,14 @@ public static void assertUriMatches(String current, String desc, String expected
                 .isNotNull()
                 .matches(s -> QNameUtil.matchUri(s, expected), "is " + expected);
     }
+
+    public static void assertSerializable(Serializable serializable) {
+        try {
+            String s = SerializationUtil.toString(serializable);
+            System.out.println("Checked that " + serializable.getClass() + " is really serializable: size is " + s.length());
+        } catch (Throwable e) {
+            e.printStackTrace();
+            fail(serializable.getClass() + " is not serializable: " + e.getMessage());
+        }
+    }
 }

model/model-api/src/main/java/com/evolveum/midpoint/model/api/context/AssignmentPath.java

@@ -20,6 +20,7 @@
 import com.evolveum.midpoint.xml.ns._public.common.common_3.OrderConstraintsType;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -31,7 +32,7 @@
  * @author semancik
  * @author mederly
  */
-public interface AssignmentPath extends DebugDumpable, ShortDumpable, Cloneable {
+public interface AssignmentPath extends DebugDumpable, ShortDumpable, Cloneable, Serializable {
 
     List<? extends AssignmentPathSegment> getSegments();
 
@@ -46,8 +47,6 @@ public interface AssignmentPath extends DebugDumpable, ShortDumpable, Cloneable
 
     int size();
 
-//    EvaluationOrder getEvaluationOrder();
-
     AssignmentPathSegment last();
 
     // beforeLast(0) means last()

model/model-api/src/main/java/com/evolveum/midpoint/model/api/context/AssignmentPathSegment.java

@@ -17,6 +17,7 @@
 import com.evolveum.midpoint.xml.ns._public.common.common_3.OrderConstraintsType;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.Serializable;
 import java.util.List;
 
 /**
@@ -27,7 +28,7 @@
  * @author semancik
  * @author mederly
  */
-public interface AssignmentPathSegment extends DebugDumpable, ShortDumpable {
+public interface AssignmentPathSegment extends DebugDumpable, ShortDumpable, Serializable {
 
     // Returns version of the assignment (old/new) that was evaluated
     AssignmentType getAssignment();

model/model-api/src/main/java/com/evolveum/midpoint/model/api/context/EvaluatedAssignment.java

@@ -6,6 +6,7 @@
  */
 package com.evolveum.midpoint.model.api.context;
 
+import java.io.Serializable;
 import java.util.Collection;
 
 import javax.xml.namespace.QName;
@@ -17,14 +18,15 @@
 import com.evolveum.midpoint.security.api.Authorization;
 import com.evolveum.midpoint.task.api.Task;
 import com.evolveum.midpoint.util.DebugDumpable;
+import com.evolveum.midpoint.util.ShortDumpable;
 import com.evolveum.midpoint.util.exception.ObjectNotFoundException;
 import com.evolveum.midpoint.util.exception.SchemaException;
 import com.evolveum.midpoint.xml.ns._public.common.common_3.AdminGuiConfigurationType;
 import com.evolveum.midpoint.xml.ns._public.common.common_3.AssignmentHolderType;
 import com.evolveum.midpoint.xml.ns._public.common.common_3.AssignmentType;
 import org.jetbrains.annotations.NotNull;
 
-public interface EvaluatedAssignment<AH extends AssignmentHolderType> extends DebugDumpable {
+public interface EvaluatedAssignment<AH extends AssignmentHolderType> extends ShortDumpable, DebugDumpable, Serializable {
 
     AssignmentType getAssignmentType();
 

model/model-api/src/main/java/com/evolveum/midpoint/model/api/context/EvaluatedAssignmentTarget.java

@@ -13,11 +13,13 @@
 import com.evolveum.midpoint.xml.ns._public.common.common_3.AssignmentType;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.Serializable;
+
 /**
  * @author semancik
  *
  */
-public interface EvaluatedAssignmentTarget extends DebugDumpable {
+public interface EvaluatedAssignmentTarget extends DebugDumpable, Serializable {
 
     @NotNull
     PrismObject<? extends AssignmentHolderType> getTarget();

model/model-api/src/main/java/com/evolveum/midpoint/model/api/context/EvaluatedPolicyRuleTrigger.java

@@ -16,6 +16,7 @@
 import com.evolveum.midpoint.xml.ns._public.common.common_3.*;
 import org.jetbrains.annotations.NotNull;
 
+import java.io.Serializable;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Objects;
@@ -25,7 +26,7 @@
  *
  * @author semancik
  */
-public abstract class EvaluatedPolicyRuleTrigger<CT extends AbstractPolicyConstraintType> implements DebugDumpable {
+public abstract class EvaluatedPolicyRuleTrigger<CT extends AbstractPolicyConstraintType> implements DebugDumpable, Serializable {
 
     @NotNull private final PolicyConstraintKindType constraintKind;
     @NotNull private final CT constraint;

model/model-api/src/main/java/com/evolveum/midpoint/model/api/context/EvaluatedResourceObjectConstruction.java

@@ -14,6 +14,8 @@
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
+import java.io.Serializable;
+
 /**
  * Facade interface that provides insight about construction that was evaluated by projector code.
  * It is used for several purposes, e.g. to display all evaluated assignments, both direct and indirect.
@@ -25,7 +27,7 @@
  * @author mederly
  * @author Radovan Semancik
  */
-public interface EvaluatedResourceObjectConstruction extends DebugDumpable {
+public interface EvaluatedResourceObjectConstruction extends DebugDumpable, Serializable {
 
     /**
      * Resource on which the object is to be constructed.

model/model-api/src/main/java/com/evolveum/midpoint/model/api/context/EvaluationOrder.java

@@ -7,6 +7,7 @@
 
 package com.evolveum.midpoint.model.api.context;
 
+import java.io.Serializable;
 import java.util.Collection;
 import java.util.List;
 import java.util.Map;
@@ -23,7 +24,7 @@
  * @author semancik
  * @author mederly
  */
-public interface EvaluationOrder extends DebugDumpable, ShortDumpable, Cloneable {
+public interface EvaluationOrder extends DebugDumpable, ShortDumpable, Cloneable, Serializable {
 
     int getSummaryOrder();