feat: improve bpn validation

build.gradle.kts

@@ -81,6 +81,10 @@ allprojects {
     configure<org.eclipse.edc.plugins.autodoc.AutodocExtension> {
         processorVersion.set(annotationProcessorVersion)
         outputDirectory.set(project.buildDir)
+        // uncomment the following lines to enable the Autodoc-2-Markdown converter
+        // only available with EDC 0.2.1 SNAPSHOT
+        // additionalInputDirectory.set(downloadDir.asFile)
+        // downloadDirectory.set(downloadDir.asFile)
     }
 
     configure<org.eclipse.edc.plugins.edcbuild.extensions.BuildExtension> {

docs/development/decision-records/2023-08-03_improve_bpn_validation/README.md

@@ -0,0 +1,42 @@
+# Removal of manually curated CHANGELOG.md
+
+## Decision
+
+The BPN validation extension will be improved in the following aspects:
+
+1. Instead of hard-coding them on policies, BPNs are stored in a database (in-mem + Postgres)
+2. BPNs are grouped to enable stable policies
+3. More `Operator`s are supported
+4. Database entries can be manipulated using a REST API
+
+## Rationale
+
+Hard-coding BPNs on policies is quite inflexible and does not scale, because when a new business partner joins or leaves
+the network, all participants would have to update all their policies, which is a significant migration effort. Instead,
+a structure has to be defined where that situation can be handled in a less intrusive and involved way. This effectively
+will remove the need to update/migrate policies.
+
+## Approach
+
+Every BPN is associated with one or more groups, for example `BPN0000001` -> `["gold_member"]`. It is important to note,
+that these groups are _internal_ tags that every participant maintains on their own, they are not claims in
+VerifiableCredentials (the BPN would be a claim, however). A new policy constraint is introduced, that looks like this:
+
+```json
+{
+  "constraint": {
+    "leftOperand": "https://w3id.org/tractusx/v0.0.1/ns/BusinessPartnerGroup",
+    "operator": "isAnyOf",
+    "rightOperand": [
+      "gold_customer",
+      "platin_partner"
+    ]
+  }
+}
+```
+
+NB: the `leftOperand` must be an IRI as mandated by ODRL, thus it must either be prefixed with the namespace (as shown
+in the example), or using a vocabulary entry in the JSON-LD context, i.e. `tx:BusinessPartnerGroup`. Supported operators
+will be: `eq, neq, in, isAllOf, isAnyOf, isNoneOf`.
+
+Manipulating the BPN -> group associations can be done through a REST API.

edc-extensions/bpn-validation/build.gradle.kts

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2021,2022 Contributors to the Eclipse Foundation
+ *
+ * See the NOTICE file(s) distributed with this work for additional
+ * information regarding copyright ownership.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+plugins {
+    `java-library`
+    `maven-publish`
+    `java-test-fixtures`
+}
+
+dependencies {
+    implementation(project(":spi:core-spi"))
+    api(libs.edc.spi.core)
+    implementation(libs.edc.spi.policy)
+    implementation(libs.edc.spi.contract)
+    implementation(libs.edc.spi.policyengine)
+
+    testFixturesImplementation(libs.edc.junit)
+    testFixturesImplementation(libs.junit.jupiter.api)
+    testFixturesImplementation(libs.assertj)
+}

edc-extensions/bpn-validation/src/main/java/org/eclipse/tractusx/edc/validation/businesspartner/BusinessPartnerEvaluationExtension.java

@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2023 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Contributors:
+ *       Bayerische Motoren Werke Aktiengesellschaft (BMW AG) - initial API and implementation
+ *
+ */
+
+package org.eclipse.tractusx.edc.validation.businesspartner;
+
+import org.eclipse.edc.policy.engine.spi.PolicyEngine;
+import org.eclipse.edc.policy.engine.spi.RuleBindingRegistry;
+import org.eclipse.edc.policy.model.Permission;
+import org.eclipse.edc.runtime.metamodel.annotation.Extension;
+import org.eclipse.edc.runtime.metamodel.annotation.Inject;
+import org.eclipse.edc.spi.system.ServiceExtension;
+import org.eclipse.edc.spi.system.ServiceExtensionContext;
+import org.eclipse.tractusx.edc.validation.businesspartner.functions.BusinessPartnerGroupFunction;
+import org.eclipse.tractusx.edc.validation.businesspartner.spi.BusinessPartnerGroupStore;
+
+import static org.eclipse.edc.connector.contract.spi.offer.ContractDefinitionResolver.CATALOGING_SCOPE;
+import static org.eclipse.edc.connector.contract.spi.validation.ContractValidationService.NEGOTIATION_SCOPE;
+import static org.eclipse.edc.connector.contract.spi.validation.ContractValidationService.TRANSFER_SCOPE;
+
+/**
+ * Registers a {@link org.eclipse.tractusx.edc.validation.businesspartner.functions.BusinessPartnerGroupFunction} for the following scopes:
+ * <ul>
+ *     <li>{@link org.eclipse.edc.connector.contract.spi.offer.ContractDefinitionResolver#CATALOGING_SCOPE}</li>
+ *     <li>{@link org.eclipse.edc.connector.contract.spi.validation.ContractValidationService#NEGOTIATION_SCOPE}</li>
+ *     <li>{@link org.eclipse.edc.connector.contract.spi.validation.ContractValidationService#TRANSFER_SCOPE}</li>
+ * </ul>
+ * The rule to which the function is bound is {@link BusinessPartnerGroupFunction#BUSINESS_PARTNER_CONSTRAINT_KEY}. That means, that policies that are bound to these scopes look
+ * like this:
+ * <pre>
+ * {
+ *     "constraint": {
+ *         "leftOperand": "https://w3id.org/tractusx/v0.0.1/ns/BusinessPartnerGroup",
+ *         "operator": "isAnyOf",
+ *         "rightOperand": ["gold_customer","platin_partner"]
+ *     }
+ * }
+ * </pre>
+ * <p>
+ * Note that the {@link BusinessPartnerGroupFunction} is an {@link org.eclipse.edc.policy.engine.spi.AtomicConstraintFunction}, thus it is registered with the {@link PolicyEngine}  for the {@link Permission} class.
+ */
+@Extension(value = "Registers a function to evaluate whether a BPN number is covered by a certain policy or not", categories = {"policy", "contract"})
+public class BusinessPartnerEvaluationExtension implements ServiceExtension {
+
+    private static final String USE = "USE";
+    @Inject
+    private RuleBindingRegistry ruleBindingRegistry;
+    @Inject
+    private PolicyEngine policyEngine;
+    @Inject
+    private BusinessPartnerGroupStore store;
+
+    @Override
+    public void initialize(ServiceExtensionContext context) {
+        var function = new BusinessPartnerGroupFunction(store);
+
+        bindToScope(function, TRANSFER_SCOPE);
+        bindToScope(function, NEGOTIATION_SCOPE);
+        bindToScope(function, CATALOGING_SCOPE);
+    }
+
+    private void bindToScope(BusinessPartnerGroupFunction function, String scope) {
+        ruleBindingRegistry.bind(USE, scope);
+        ruleBindingRegistry.bind(BusinessPartnerGroupFunction.BUSINESS_PARTNER_CONSTRAINT_KEY, scope);
+
+        policyEngine.registerFunction(scope, Permission.class, BusinessPartnerGroupFunction.BUSINESS_PARTNER_CONSTRAINT_KEY, function);
+    }
+}

edc-extensions/bpn-validation/src/main/java/org/eclipse/tractusx/edc/validation/businesspartner/defaults/DefaultStoreProviderExtension.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2023 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Contributors:
+ *       Bayerische Motoren Werke Aktiengesellschaft (BMW AG) - initial API and implementation
+ *
+ */
+
+package org.eclipse.tractusx.edc.validation.businesspartner.defaults;
+
+import org.eclipse.edc.runtime.metamodel.annotation.Extension;
+import org.eclipse.edc.runtime.metamodel.annotation.Provider;
+import org.eclipse.edc.spi.system.ServiceExtension;
+import org.eclipse.tractusx.edc.validation.businesspartner.spi.BusinessPartnerGroupStore;
+
+@Extension("Provides a default BusinessPartnerGroupStore")
+public class DefaultStoreProviderExtension implements ServiceExtension {
+
+    @Provider(isDefault = true)
+    public BusinessPartnerGroupStore createInMemStore() {
+        return new InMemoryBusinessPartnerGroupStore();
+    }
+}

edc-extensions/bpn-validation/src/main/java/org/eclipse/tractusx/edc/validation/businesspartner/defaults/InMemoryBusinessPartnerGroupStore.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2023 Bayerische Motoren Werke Aktiengesellschaft (BMW AG)
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Apache License, Version 2.0 which is available at
+ * https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Contributors:
+ *       Bayerische Motoren Werke Aktiengesellschaft (BMW AG) - initial API and implementation
+ *
+ */
+
+package org.eclipse.tractusx.edc.validation.businesspartner.defaults;
+
+import org.eclipse.edc.spi.result.StoreResult;
+import org.eclipse.tractusx.edc.validation.businesspartner.spi.BusinessPartnerGroupStore;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class InMemoryBusinessPartnerGroupStore implements BusinessPartnerGroupStore {
+    private final Map<String, List<String>> cache = new HashMap<>();
+
+    @Override
+    public StoreResult<List<String>> resolveForBpn(String businessPartnerNumber) {
+        var entry = cache.get(businessPartnerNumber);
+        return entry == null ?
+                StoreResult.notFound(NOT_FOUND_TEMPLATE.formatted(businessPartnerNumber)) :
+                StoreResult.success(entry);
+    }
+
+    @Override
+    public StoreResult<Void> save(String businessPartnerNumber, List<String> groups) {
+        //to maintain behavioural consistency with the SQL store
+        if (cache.containsKey(businessPartnerNumber)) {
+            return StoreResult.alreadyExists(ALREADY_EXISTS_TEMPLATE.formatted(businessPartnerNumber));
+        }
+        cache.put(businessPartnerNumber, groups);
+        return StoreResult.success();
+    }
+
+    @Override
+    public StoreResult<Void> delete(String businessPartnerNumber) {
+
+        return cache.remove(businessPartnerNumber) == null ?
+                StoreResult.notFound(NOT_FOUND_TEMPLATE.formatted(businessPartnerNumber)) :
+                StoreResult.success();
+    }
+
+    @Override
+    public StoreResult<Void> update(String businessPartnerNumber, List<String> groups) {
+        if (cache.containsKey(businessPartnerNumber)) {
+            cache.put(businessPartnerNumber, groups);
+            return StoreResult.success();
+        }
+        return StoreResult.notFound(NOT_FOUND_TEMPLATE.formatted(businessPartnerNumber));
+    }
+}