feat: policy structure review (#1968)

* rename existing policy modules

* cleanup readme

* Move PolicyDefinition class to the policy-spi module

* Introduce policy-engine-spi and policy-engine modules

* Rename package

Author: ndr-brt

README.md

@@ -210,14 +210,6 @@ Contains code that demonstrates how the connector can be used in various scenari
 connector from a unit test in order to try out functionality quickly or how to implement an outward-facing REST API for
 a connector.
 
-### `common`
-
-Contains utility code such as collection utils, string utils and helper classes.
-
-### `scripts`
-
-Contains several scripts to deploy a connector in an AKS cluster on Microsoft Azure using Terraform.
-
 ## Releases
 
 GitHub releases are listed [here](https://github.com/eclipse-dataspaceconnector/DataSpaceConnector/releases).

core/common/base/build.gradle.kts

@@ -26,9 +26,10 @@ val bouncycastleVersion: String by project
 
 dependencies {
     api(project(":spi:common:core-spi"))
+    api(project(":spi:common:policy-engine-spi"))
     api(project(":spi:common:transaction-spi"))
-    implementation(project(":core:common:util"))
     implementation(project(":core:common:policy-engine"))
+    implementation(project(":core:common:util"))
 
     api("com.squareup.okhttp3:okhttp:${okHttpVersion}")
     api("dev.failsafe:failsafe:${failsafeVersion}")

core/common/base/src/main/java/org/eclipse/dataspaceconnector/core/CoreServicesExtension.java

@@ -17,13 +17,13 @@
 import org.eclipse.dataspaceconnector.core.base.CommandHandlerRegistryImpl;
 import org.eclipse.dataspaceconnector.core.base.RemoteMessageDispatcherRegistryImpl;
 import org.eclipse.dataspaceconnector.core.base.agent.ParticipantAgentServiceImpl;
-import org.eclipse.dataspaceconnector.core.base.policy.PolicyEngineImpl;
-import org.eclipse.dataspaceconnector.core.base.policy.RuleBindingRegistryImpl;
-import org.eclipse.dataspaceconnector.core.base.policy.ScopeFilter;
 import org.eclipse.dataspaceconnector.core.event.EventExecutorServiceContainer;
 import org.eclipse.dataspaceconnector.core.event.EventRouterImpl;
 import org.eclipse.dataspaceconnector.core.health.HealthCheckServiceConfiguration;
 import org.eclipse.dataspaceconnector.core.health.HealthCheckServiceImpl;
+import org.eclipse.dataspaceconnector.core.policy.engine.PolicyEngineImpl;
+import org.eclipse.dataspaceconnector.core.policy.engine.RuleBindingRegistryImpl;
+import org.eclipse.dataspaceconnector.core.policy.engine.ScopeFilter;
 import org.eclipse.dataspaceconnector.core.security.DefaultPrivateKeyParseFunction;
 import org.eclipse.dataspaceconnector.policy.model.PolicyRegistrationTypes;
 import org.eclipse.dataspaceconnector.spi.EdcSetting;
@@ -32,8 +32,8 @@
 import org.eclipse.dataspaceconnector.spi.event.EventRouter;
 import org.eclipse.dataspaceconnector.spi.message.RemoteMessageDispatcherRegistry;
 import org.eclipse.dataspaceconnector.spi.monitor.Monitor;
-import org.eclipse.dataspaceconnector.spi.policy.PolicyEngine;
-import org.eclipse.dataspaceconnector.spi.policy.RuleBindingRegistry;
+import org.eclipse.dataspaceconnector.spi.policy.engine.PolicyEngine;
+import org.eclipse.dataspaceconnector.spi.policy.engine.RuleBindingRegistry;
 import org.eclipse.dataspaceconnector.spi.security.CertificateResolver;
 import org.eclipse.dataspaceconnector.spi.security.PrivateKeyResolver;
 import org.eclipse.dataspaceconnector.spi.security.Vault;
@@ -97,7 +97,7 @@ public class CoreServicesExtension implements ServiceExtension {
     private EventExecutorServiceContainer eventExecutorServiceContainer;
 
     private HealthCheckServiceImpl healthCheckService;
-    private RuleBindingRegistryImpl ruleBindingRegistry;
+    private RuleBindingRegistry ruleBindingRegistry;
     private ScopeFilter scopeFilter;
 
     @Override

core/common/base/src/main/java/org/eclipse/dataspaceconnector/core/base/agent/ParticipantAgentServiceImpl.java

@@ -29,7 +29,7 @@
  * Default implementation.
  */
 public class ParticipantAgentServiceImpl implements ParticipantAgentService {
-    private List<ParticipantAgentServiceExtension> extensions = new ArrayList<>();
+    private final List<ParticipantAgentServiceExtension> extensions = new ArrayList<>();
 
     @Override
     public ParticipantAgent createFor(ClaimToken token) {

core/common/policy-engine/build.gradle.kts

@@ -1,5 +1,5 @@
 /*
- *  Copyright (c) 2020, 2021 Microsoft Corporation
+ *  Copyright (c) 2022 Bayerische Motoren Werke Aktiengesellschaft
  *
  *  This program and the accompanying materials are made available under the
  *  terms of the Apache License, Version 2.0 which is available at
@@ -8,7 +8,7 @@
  *  SPDX-License-Identifier: Apache-2.0
  *
  *  Contributors:
- *       Microsoft Corporation - initial API and implementation
+ *       Bayerische Motoren Werke Aktiengesellschaft - initial API and implementation
  *
  */
 
@@ -18,7 +18,9 @@ plugins {
 }
 
 dependencies {
-    api(project(":core:common:policy-evaluator"))
+    api(project(":spi:common:policy-engine-spi"))
+    api(project(":spi:common:policy-model"))
+    implementation(project(":core:common:policy-evaluator"))
 }
 
 publishing {

core/common/base/src/main/java/org/eclipse/dataspaceconnector/core/base/policy/PolicyContextImpl.java core/common/policy-engine/src/main/java/org/eclipse/dataspaceconnector/core/policy/engine/PolicyContextImpl.java

@@ -13,10 +13,10 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.core.base.policy;
+package org.eclipse.dataspaceconnector.core.policy.engine;
 
 import org.eclipse.dataspaceconnector.spi.agent.ParticipantAgent;
-import org.eclipse.dataspaceconnector.spi.policy.PolicyContext;
+import org.eclipse.dataspaceconnector.spi.policy.engine.PolicyContext;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.ArrayList;

core/common/base/src/main/java/org/eclipse/dataspaceconnector/core/base/policy/PolicyEngineImpl.java core/common/policy-engine/src/main/java/org/eclipse/dataspaceconnector/core/policy/engine/PolicyEngineImpl.java

@@ -12,20 +12,20 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.core.base.policy;
+package org.eclipse.dataspaceconnector.core.policy.engine;
 
-import org.eclipse.dataspaceconnector.policy.engine.PolicyEvaluator;
-import org.eclipse.dataspaceconnector.policy.engine.RuleProblem;
+import org.eclipse.dataspaceconnector.policy.evaluator.PolicyEvaluator;
+import org.eclipse.dataspaceconnector.policy.evaluator.RuleProblem;
 import org.eclipse.dataspaceconnector.policy.model.Duty;
 import org.eclipse.dataspaceconnector.policy.model.Permission;
 import org.eclipse.dataspaceconnector.policy.model.Policy;
 import org.eclipse.dataspaceconnector.policy.model.Prohibition;
 import org.eclipse.dataspaceconnector.policy.model.Rule;
 import org.eclipse.dataspaceconnector.spi.agent.ParticipantAgent;
-import org.eclipse.dataspaceconnector.spi.policy.AtomicConstraintFunction;
-import org.eclipse.dataspaceconnector.spi.policy.PolicyContext;
-import org.eclipse.dataspaceconnector.spi.policy.PolicyEngine;
-import org.eclipse.dataspaceconnector.spi.policy.RuleFunction;
+import org.eclipse.dataspaceconnector.spi.policy.engine.AtomicConstraintFunction;
+import org.eclipse.dataspaceconnector.spi.policy.engine.PolicyContext;
+import org.eclipse.dataspaceconnector.spi.policy.engine.PolicyEngine;
+import org.eclipse.dataspaceconnector.spi.policy.engine.RuleFunction;
 import org.eclipse.dataspaceconnector.spi.result.Result;
 
 import java.util.ArrayList;
@@ -43,13 +43,13 @@
 public class PolicyEngineImpl implements PolicyEngine {
     private static final String ALL_SCOPES_DELIMITED = ALL_SCOPES + ".";
 
-    private ScopeFilter scopeFilter;
+    private final ScopeFilter scopeFilter;
 
-    private Map<String, List<ConstraintFunctionEntry<Rule>>> constraintFunctions = new TreeMap<>();
-    private Map<String, List<RuleFunctionEntry<Rule>>> ruleFunctions = new TreeMap<>();
+    private final Map<String, List<ConstraintFunctionEntry<Rule>>> constraintFunctions = new TreeMap<>();
+    private final Map<String, List<RuleFunctionEntry<Rule>>> ruleFunctions = new TreeMap<>();
 
-    private List<BiFunction<Policy, PolicyContext, Boolean>> preValidators = new ArrayList<>();
-    private List<BiFunction<Policy, PolicyContext, Boolean>> postValidators = new ArrayList<>();
+    private final List<BiFunction<Policy, PolicyContext, Boolean>> preValidators = new ArrayList<>();
+    private final List<BiFunction<Policy, PolicyContext, Boolean>> postValidators = new ArrayList<>();
 
     public PolicyEngineImpl(ScopeFilter scopeFilter) {
         this.scopeFilter = scopeFilter;

core/common/base/src/main/java/org/eclipse/dataspaceconnector/core/base/policy/RuleBindingRegistryImpl.java core/common/policy-engine/src/main/java/org/eclipse/dataspaceconnector/core/policy/engine/RuleBindingRegistryImpl.java

@@ -12,9 +12,9 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.core.base.policy;
+package org.eclipse.dataspaceconnector.core.policy.engine;
 
-import org.eclipse.dataspaceconnector.spi.policy.RuleBindingRegistry;
+import org.eclipse.dataspaceconnector.spi.policy.engine.RuleBindingRegistry;
 
 import java.util.HashMap;
 import java.util.HashSet;
@@ -25,7 +25,7 @@ public class RuleBindingRegistryImpl implements RuleBindingRegistry {
     private static final String DELIMITER = ".";
     private static final String DELIMITED_ALL = "*" + DELIMITER;
 
-    private Map<String, Set<String>> ruleBindings = new HashMap<>();
+    private final Map<String, Set<String>> ruleBindings = new HashMap<>();
 
     @Override
     public void bind(String ruleType, String scope) {

core/common/base/src/main/java/org/eclipse/dataspaceconnector/core/base/policy/ScopeFilter.java core/common/policy-engine/src/main/java/org/eclipse/dataspaceconnector/core/policy/engine/ScopeFilter.java

@@ -12,7 +12,7 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.core.base.policy;
+package org.eclipse.dataspaceconnector.core.policy.engine;
 
 import org.eclipse.dataspaceconnector.policy.model.AtomicConstraint;
 import org.eclipse.dataspaceconnector.policy.model.Constraint;
@@ -24,7 +24,7 @@
 import org.eclipse.dataspaceconnector.policy.model.Prohibition;
 import org.eclipse.dataspaceconnector.policy.model.Rule;
 import org.eclipse.dataspaceconnector.policy.model.XoneConstraint;
-import org.eclipse.dataspaceconnector.spi.policy.RuleBindingRegistry;
+import org.eclipse.dataspaceconnector.spi.policy.engine.RuleBindingRegistry;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;

core/common/base/src/test/java/org/eclipse/dataspaceconnector/core/base/policy/PolicyEngineImplScenariosTest.java core/common/policy-engine/src/test/java/org/eclipse/dataspaceconnector/core/policy/engine/PolicyEngineImplScenariosTest.java

@@ -12,7 +12,7 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.core.base.policy;
+package org.eclipse.dataspaceconnector.core.policy.engine;
 
 import org.eclipse.dataspaceconnector.policy.model.Action;
 import org.eclipse.dataspaceconnector.policy.model.AtomicConstraint;
@@ -21,7 +21,7 @@
 import org.eclipse.dataspaceconnector.policy.model.Policy;
 import org.eclipse.dataspaceconnector.policy.model.Prohibition;
 import org.eclipse.dataspaceconnector.spi.agent.ParticipantAgent;
-import org.eclipse.dataspaceconnector.spi.policy.RuleBindingRegistry;
+import org.eclipse.dataspaceconnector.spi.policy.engine.RuleBindingRegistry;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
@@ -31,7 +31,7 @@
 import static java.util.Collections.emptyMap;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.eclipse.dataspaceconnector.policy.model.Operator.IN;
-import static org.eclipse.dataspaceconnector.spi.policy.PolicyEngine.ALL_SCOPES;
+import static org.eclipse.dataspaceconnector.spi.policy.engine.PolicyEngine.ALL_SCOPES;
 
 /**
  * Tests key policy enforcement scenarios. Also serves as a blueprint for custom policy functions.

core/common/base/src/test/java/org/eclipse/dataspaceconnector/core/base/policy/PolicyEngineImplTest.java core/common/policy-engine/src/test/java/org/eclipse/dataspaceconnector/core/policy/engine/PolicyEngineImplTest.java

@@ -12,7 +12,7 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.core.base.policy;
+package org.eclipse.dataspaceconnector.core.policy.engine;
 
 import org.eclipse.dataspaceconnector.policy.model.Action;
 import org.eclipse.dataspaceconnector.policy.model.AtomicConstraint;
@@ -22,15 +22,15 @@
 import org.eclipse.dataspaceconnector.policy.model.Policy;
 import org.eclipse.dataspaceconnector.policy.model.Prohibition;
 import org.eclipse.dataspaceconnector.spi.agent.ParticipantAgent;
-import org.eclipse.dataspaceconnector.spi.policy.RuleBindingRegistry;
+import org.eclipse.dataspaceconnector.spi.policy.engine.RuleBindingRegistry;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
 import static java.util.Collections.emptyMap;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.eclipse.dataspaceconnector.policy.model.Operator.EQ;
-import static org.eclipse.dataspaceconnector.spi.policy.PolicyEngine.ALL_SCOPES;
+import static org.eclipse.dataspaceconnector.spi.policy.engine.PolicyEngine.ALL_SCOPES;
 
 class PolicyEngineImplTest {
     private static final String TEST_SCOPE = "test";

core/common/base/src/test/java/org/eclipse/dataspaceconnector/core/base/policy/RuleBindingRegistryImplTest.java core/common/policy-engine/src/test/java/org/eclipse/dataspaceconnector/core/policy/engine/RuleBindingRegistryImplTest.java

@@ -12,9 +12,9 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.core.base.policy;
+package org.eclipse.dataspaceconnector.core.policy.engine;
 
-import org.eclipse.dataspaceconnector.spi.policy.PolicyEngine;
+import org.eclipse.dataspaceconnector.spi.policy.engine.PolicyEngine;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 

core/common/base/src/test/java/org/eclipse/dataspaceconnector/core/base/policy/ScopeFilterTest.java core/common/policy-engine/src/test/java/org/eclipse/dataspaceconnector/core/policy/engine/ScopeFilterTest.java

@@ -12,7 +12,7 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.core.base.policy;
+package org.eclipse.dataspaceconnector.core.policy.engine;
 
 import org.eclipse.dataspaceconnector.policy.model.Action;
 import org.eclipse.dataspaceconnector.policy.model.AndConstraint;
@@ -24,7 +24,7 @@
 import org.eclipse.dataspaceconnector.policy.model.Policy;
 import org.eclipse.dataspaceconnector.policy.model.PolicyType;
 import org.eclipse.dataspaceconnector.policy.model.Prohibition;
-import org.eclipse.dataspaceconnector.spi.policy.RuleBindingRegistry;
+import org.eclipse.dataspaceconnector.spi.policy.engine.RuleBindingRegistry;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 
@@ -49,7 +49,6 @@ void verifyFiltersUnboundPermissionType() {
         assertThat(scopeFilter.applyScope(permission, "unbound.scope")).isNull();
     }
 
-
     @Test
     void verifyFiltersPolicy() {
         registry.bind(REPORT_ACTION.getType(), BOUND_SCOPE);

core/common/policy-evaluator/build.gradle.kts

@@ -18,7 +18,9 @@ plugins {
 }
 
 dependencies {
+    api(project(":spi:common:policy-model"))
 }
+
 publishing {
     publications {
         create<MavenPublication>("policy-evaluator") {

core/common/policy-engine/src/main/java/org/eclipse/dataspaceconnector/policy/engine/ConstraintProblem.java core/common/policy-evaluator/src/main/java/org/eclipse/dataspaceconnector/policy/evaluator/ConstraintProblem.java

@@ -12,7 +12,7 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.policy.engine;
+package org.eclipse.dataspaceconnector.policy.evaluator;
 
 import org.eclipse.dataspaceconnector.policy.model.Constraint;
 

core/common/policy-engine/src/main/java/org/eclipse/dataspaceconnector/policy/engine/PolicyEvaluationResult.java core/common/policy-evaluator/src/main/java/org/eclipse/dataspaceconnector/policy/evaluator/PolicyEvaluationResult.java

@@ -12,7 +12,7 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.policy.engine;
+package org.eclipse.dataspaceconnector.policy.evaluator;
 
 import org.jetbrains.annotations.NotNull;
 

core/common/policy-engine/src/main/java/org/eclipse/dataspaceconnector/policy/engine/PolicyEvaluator.java core/common/policy-evaluator/src/main/java/org/eclipse/dataspaceconnector/policy/evaluator/PolicyEvaluator.java

@@ -12,7 +12,7 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.policy.engine;
+package org.eclipse.dataspaceconnector.policy.evaluator;
 
 import org.eclipse.dataspaceconnector.policy.model.AndConstraint;
 import org.eclipse.dataspaceconnector.policy.model.AtomicConstraint;

core/common/policy-engine/src/main/java/org/eclipse/dataspaceconnector/policy/engine/RuleProblem.java core/common/policy-evaluator/src/main/java/org/eclipse/dataspaceconnector/policy/evaluator/RuleProblem.java

@@ -12,7 +12,7 @@
  *
  */
 
-package org.eclipse.dataspaceconnector.policy.engine;
+package org.eclipse.dataspaceconnector.policy.evaluator;
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.databind.annotation.JsonDeserialize;

core/common/policy-engine/src/test/java/org/eclipse/dataspaceconnector/policy/engine/model/PolicyEvaluatorScenarioTest.java core/common/policy-evaluator/src/test/java/org/eclipse/dataspaceconnector/policy/engine/model/PolicyEvaluatorScenarioTest.java

@@ -14,7 +14,7 @@
 
 package org.eclipse.dataspaceconnector.policy.engine.model;
 
-import org.eclipse.dataspaceconnector.policy.engine.PolicyEvaluator;
+import org.eclipse.dataspaceconnector.policy.evaluator.PolicyEvaluator;
 import org.eclipse.dataspaceconnector.policy.model.AndConstraint;
 import org.eclipse.dataspaceconnector.policy.model.AtomicConstraint;
 import org.eclipse.dataspaceconnector.policy.model.Permission;

core/common/policy-engine/src/test/java/org/eclipse/dataspaceconnector/policy/engine/model/PolicyEvaluatorTest.java core/common/policy-evaluator/src/test/java/org/eclipse/dataspaceconnector/policy/engine/model/PolicyEvaluatorTest.java

@@ -14,7 +14,7 @@
 
 package org.eclipse.dataspaceconnector.policy.engine.model;
 
-import org.eclipse.dataspaceconnector.policy.engine.PolicyEvaluator;
+import org.eclipse.dataspaceconnector.policy.evaluator.PolicyEvaluator;
 import org.eclipse.dataspaceconnector.policy.model.Action;
 import org.eclipse.dataspaceconnector.policy.model.Duty;
 import org.eclipse.dataspaceconnector.policy.model.Permission;

core/common/policy-engine/src/test/java/org/eclipse/dataspaceconnector/policy/engine/model/PolicyTestFunctions.java core/common/policy-evaluator/src/test/java/org/eclipse/dataspaceconnector/policy/engine/model/PolicyTestFunctions.java

@@ -22,6 +22,7 @@ plugins {
 }
 
 dependencies {
+    api(project(":spi:common:policy-engine-spi"))
     api(project(":spi:control-plane:contract-spi"))
 
     implementation(project(":core:common:state-machine"))

core/control-plane/contract/build.gradle.kts

@@ -46,7 +46,7 @@
 import org.eclipse.dataspaceconnector.spi.event.EventRouter;
 import org.eclipse.dataspaceconnector.spi.message.RemoteMessageDispatcherRegistry;
 import org.eclipse.dataspaceconnector.spi.monitor.Monitor;
-import org.eclipse.dataspaceconnector.spi.policy.PolicyEngine;
+import org.eclipse.dataspaceconnector.spi.policy.engine.PolicyEngine;
 import org.eclipse.dataspaceconnector.spi.policy.store.PolicyArchive;
 import org.eclipse.dataspaceconnector.spi.policy.store.PolicyDefinitionStore;
 import org.eclipse.dataspaceconnector.spi.retry.ExponentialWaitStrategy;

core/control-plane/contract/src/main/java/org/eclipse/dataspaceconnector/contract/ContractServiceExtension.java

@@ -22,7 +22,7 @@
 import org.eclipse.dataspaceconnector.spi.message.Range;
 import org.eclipse.dataspaceconnector.spi.monitor.Monitor;
 import org.eclipse.dataspaceconnector.spi.policy.PolicyDefinition;
-import org.eclipse.dataspaceconnector.spi.policy.PolicyEngine;
+import org.eclipse.dataspaceconnector.spi.policy.engine.PolicyEngine;
 import org.eclipse.dataspaceconnector.spi.policy.store.PolicyDefinitionStore;
 import org.eclipse.dataspaceconnector.spi.query.QuerySpec;
 import org.eclipse.dataspaceconnector.spi.result.Result;

core/control-plane/contract/src/main/java/org/eclipse/dataspaceconnector/contract/offer/ContractDefinitionServiceImpl.java

@@ -22,7 +22,7 @@
 import org.eclipse.dataspaceconnector.spi.contract.offer.ContractDefinitionService;
 import org.eclipse.dataspaceconnector.spi.contract.validation.ContractValidationService;
 import org.eclipse.dataspaceconnector.spi.iam.ClaimToken;
-import org.eclipse.dataspaceconnector.spi.policy.PolicyEngine;
+import org.eclipse.dataspaceconnector.spi.policy.engine.PolicyEngine;
 import org.eclipse.dataspaceconnector.spi.policy.store.PolicyDefinitionStore;
 import org.eclipse.dataspaceconnector.spi.result.Result;
 import org.eclipse.dataspaceconnector.spi.types.domain.contract.agreement.ContractAgreement;

core/control-plane/contract/src/main/java/org/eclipse/dataspaceconnector/contract/validation/ContractValidationServiceImpl.java

@@ -21,7 +21,7 @@
 import org.eclipse.dataspaceconnector.spi.message.Range;
 import org.eclipse.dataspaceconnector.spi.monitor.Monitor;
 import org.eclipse.dataspaceconnector.spi.policy.PolicyDefinition;
-import org.eclipse.dataspaceconnector.spi.policy.PolicyEngine;
+import org.eclipse.dataspaceconnector.spi.policy.engine.PolicyEngine;
 import org.eclipse.dataspaceconnector.spi.policy.store.PolicyDefinitionStore;
 import org.eclipse.dataspaceconnector.spi.query.QuerySpec;
 import org.eclipse.dataspaceconnector.spi.result.Result;