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-rw-r--r--catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogic.java107
-rw-r--r--catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/utils/ComponentUtils.java99
-rw-r--r--catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogicTest.java15
-rw-r--r--catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/utils/ComponentUtilsTest.java130
-rw-r--r--catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/utils/TestDataUtils.java185
5 files changed, 417 insertions, 119 deletions
diff --git a/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogic.java b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogic.java
index 17f8bdef48..1db7d447f6 100644
--- a/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogic.java
+++ b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogic.java
@@ -69,6 +69,7 @@ import org.openecomp.sdc.be.components.impl.exceptions.ByActionStatusComponentEx
import org.openecomp.sdc.be.components.impl.exceptions.ByResponseFormatComponentException;
import org.openecomp.sdc.be.components.impl.exceptions.ComponentException;
import org.openecomp.sdc.be.components.utils.ArtifactUtils;
+import org.openecomp.sdc.be.components.impl.utils.ComponentUtils;
import org.openecomp.sdc.be.components.lifecycle.LifecycleBusinessLogic;
import org.openecomp.sdc.be.components.lifecycle.LifecycleChangeInfoWithAction;
import org.openecomp.sdc.be.components.lifecycle.LifecycleChangeInfoWithAction.LifecycleChanceActionEnum;
@@ -855,10 +856,10 @@ public class ArtifactsBusinessLogic extends BaseBusinessLogic {
switch (componentType) {
case RESOURCE:
case SERVICE:
- found = checkArtifactInComponent(component, artifactId);
+ found = ComponentUtils.checkArtifactInComponent(component, artifactId);
break;
case RESOURCE_INSTANCE:
- found = checkArtifactInResourceInstance(component, componentId, artifactId);
+ found = ComponentUtils.checkArtifactInResourceInstance(component, componentId, artifactId);
break;
default:
found = false;
@@ -2902,108 +2903,6 @@ public class ArtifactsBusinessLogic extends BaseBusinessLogic {
return downloadArtifact(artifactDefinition);
}
- private boolean checkArtifactInComponent(Component component, String artifactId) {
- boolean found = false;
- Map<String, ArtifactDefinition> artifactsS = component.getArtifacts();
- if (artifactsS != null) {
- for (Map.Entry<String, ArtifactDefinition> entry : artifactsS.entrySet()) {
- if (entry.getValue().getUniqueId().equals(artifactId)) {
- found = true;
- break;
- }
- }
- }
- Map<String, ArtifactDefinition> deploymentArtifactsS = component.getDeploymentArtifacts();
- if (!found && deploymentArtifactsS != null) {
- for (Map.Entry<String, ArtifactDefinition> entry : deploymentArtifactsS.entrySet()) {
- if (entry.getValue().getUniqueId().equals(artifactId)) {
- found = true;
- break;
- }
- }
- }
- Map<String, ArtifactDefinition> toscaArtifactsS = component.getToscaArtifacts();
- if (!found && toscaArtifactsS != null) {
- for (Map.Entry<String, ArtifactDefinition> entry : toscaArtifactsS.entrySet()) {
- if (entry.getValue().getUniqueId().equals(artifactId)) {
- found = true;
- break;
- }
- }
- }
-
- Map<String, InterfaceDefinition> interfaces = component.getInterfaces();
- if (!found && interfaces != null) {
- for (Map.Entry<String, InterfaceDefinition> entry : interfaces.entrySet()) {
- Map<String, Operation> operations = entry.getValue().getOperationsMap();
- for (Map.Entry<String, Operation> entryOp : operations.entrySet()) {
- if (entryOp.getValue().getImplementation() != null && entryOp.getValue()
- .getImplementation()
- .getUniqueId()
- .equals(artifactId)) {
- found = true;
- break;
- }
- }
- }
- }
- switch (component.getComponentType()) {
- case RESOURCE:
- break;
- case SERVICE:
- Map<String, ArtifactDefinition> apiArtifacts = ((Service) component).getServiceApiArtifacts();
- if (!found && apiArtifacts != null) {
- for (Map.Entry<String, ArtifactDefinition> entry : apiArtifacts.entrySet()) {
- if (entry.getValue().getUniqueId().equals(artifactId)) {
- found = true;
- break;
- }
- }
- }
- break;
- default:
-
- }
-
- return found;
- }
-
- private boolean checkArtifactInResourceInstance(Component component, String resourceInstanceId, String artifactId) {
-
- boolean found = false;
- List<ComponentInstance> resourceInstances = component.getComponentInstances();
- ComponentInstance resourceInstance = null;
- for (ComponentInstance ri : resourceInstances) {
- if (ri.getUniqueId().equals(resourceInstanceId)) {
- resourceInstance = ri;
- break;
- }
- }
- if (resourceInstance != null) {
- Map<String, ArtifactDefinition> artifacts = resourceInstance.getDeploymentArtifacts();
- if (artifacts != null) {
- for (Map.Entry<String, ArtifactDefinition> entry : artifacts.entrySet()) {
- if (entry.getValue().getUniqueId().equals(artifactId)) {
- found = true;
- break;
- }
- }
- }
- if (!found) {
- artifacts = resourceInstance.getArtifacts();
- if (artifacts != null) {
- for (Map.Entry<String, ArtifactDefinition> entry : artifacts.entrySet()) {
- if (entry.getValue().getUniqueId().equals(artifactId)) {
- found = true;
- break;
- }
- }
- }
- }
- }
- return found;
- }
-
private Component validateComponentExists(String componentId, AuditingActionEnum auditingAction, User user, String artifactId, ComponentTypeEnum componentType,
String containerComponentType) {
diff --git a/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/utils/ComponentUtils.java b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/utils/ComponentUtils.java
new file mode 100644
index 0000000000..02176d902b
--- /dev/null
+++ b/catalog-be/src/main/java/org/openecomp/sdc/be/components/impl/utils/ComponentUtils.java
@@ -0,0 +1,99 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdc.be.components.impl.utils;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Optional;
+import java.util.function.Predicate;
+import java.util.stream.Stream;
+import org.openecomp.sdc.be.datatypes.elements.OperationDataDefinition;
+import org.openecomp.sdc.be.datatypes.enums.ComponentTypeEnum;
+import org.openecomp.sdc.be.model.ArtifactDefinition;
+import org.openecomp.sdc.be.model.Component;
+import org.openecomp.sdc.be.model.ComponentInstance;
+import org.openecomp.sdc.be.model.Service;
+
+public final class ComponentUtils {
+
+ private ComponentUtils() {
+ }
+
+ public static boolean checkArtifactInComponent(
+ Component component, String artifactId
+ ) {
+ Predicate<ArtifactDefinition> hasSameArtifactId =
+ ad -> ad != null && ad.getUniqueId().equals(artifactId);
+
+ return exists(component.getArtifacts(), hasSameArtifactId) ||
+ exists(component.getDeploymentArtifacts(), hasSameArtifactId) ||
+ exists(component.getToscaArtifacts(), hasSameArtifactId) ||
+ hasOperationImplementationWithUniqueId(component, artifactId) ||
+ isServiceAndHasApiArtifactWithUniqueId(component, hasSameArtifactId);
+ }
+
+ private static boolean isServiceAndHasApiArtifactWithUniqueId(Component component,
+ Predicate<ArtifactDefinition> hasSameArtifactId) {
+ return component.getComponentType() == ComponentTypeEnum.SERVICE && exists(
+ ((Service) component).getServiceApiArtifacts(), hasSameArtifactId);
+ }
+
+ private static boolean hasOperationImplementationWithUniqueId(Component component, String artifactId) {
+ return findFirst(valueStream(component.getInterfaces())
+ .flatMap(v -> valueStream(v.getOperationsMap()))
+ .map(OperationDataDefinition::getImplementation),
+ e -> e != null && e.getUniqueId().equals(artifactId)
+ ).isPresent();
+ }
+
+ public static boolean checkArtifactInResourceInstance(
+ Component component, String resourceInstanceId, String artifactId
+ ) {
+ Predicate<ComponentInstance> hasSameResourceId =
+ ri -> ri != null && ri.getUniqueId().equals(resourceInstanceId);
+
+ Predicate<ArtifactDefinition> hasSameArtifactId =
+ ad -> ad != null && ad.getUniqueId().equals(artifactId);
+
+ return findFirst(component.getComponentInstances(), hasSameResourceId).map(ri ->
+ exists(ri.getDeploymentArtifacts(), hasSameArtifactId) ||
+ exists(ri.getArtifacts(), hasSameArtifactId)
+ ).isPresent();
+ }
+
+ private static <V> Optional<V> findFirst(List<V> ovs, Predicate<V> p) {
+ return Optional.ofNullable(ovs).flatMap(vs -> findFirst(vs.stream(), p));
+ }
+
+ private static <K, V> boolean exists(Map<K, V> okvs, Predicate<V> p) {
+ return Optional.ofNullable(okvs)
+ .flatMap(kvs -> findFirst(kvs.values().stream(), p))
+ .isPresent();
+ }
+
+ private static <V> Optional<V> findFirst(Stream<V> vs, Predicate<V> p) {
+ return Optional.ofNullable(vs).flatMap(ms -> ms.filter(p).findFirst());
+ }
+
+ private static <K, V> Stream<V> valueStream(Map<K, V> okvs) {
+ return Optional.ofNullable(okvs).map(kvs -> kvs.values().stream()).orElse(Stream.empty());
+ }
+}
diff --git a/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogicTest.java b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogicTest.java
index 6f0b83b0d5..c51456547c 100644
--- a/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogicTest.java
+++ b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/ArtifactsBusinessLogicTest.java
@@ -845,20 +845,6 @@ public class ArtifactsBusinessLogicTest extends BaseBusinessLogicMock {
}
@Test
- public void testCheckArtifactInComponent() throws Exception {
- ArtifactsBusinessLogic testSubject;
- Component component = new Resource();
- component.setComponentType(ComponentTypeEnum.RESOURCE);
- String artifactId = "";
- boolean result;
-
- // default test
- testSubject = createTestSubject();
- result = Deencapsulation.invoke(testSubject, "checkArtifactInComponent",
- new Object[]{component, artifactId});
- }
-
- @Test
public void testCheckCreateFields() throws Exception {
ArtifactsBusinessLogic testSubject;
// User user = USER;
@@ -936,7 +922,6 @@ public class ArtifactsBusinessLogicTest extends BaseBusinessLogicMock {
artifactId, component, artifacts);
}
-
@Test
public void testValidateArtifact() throws Exception {
ArtifactsBusinessLogic testSubject;
diff --git a/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/utils/ComponentUtilsTest.java b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/utils/ComponentUtilsTest.java
new file mode 100644
index 0000000000..bf9ecaf1bb
--- /dev/null
+++ b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/utils/ComponentUtilsTest.java
@@ -0,0 +1,130 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdc.be.components.impl.utils;
+
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.openecomp.sdc.be.components.impl.utils.ComponentUtils.checkArtifactInComponent;
+import static org.openecomp.sdc.be.components.impl.utils.ComponentUtils.checkArtifactInResourceInstance;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.aComponent;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.aComponentInstance;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.aResourceInstanceId;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.aUniqueId;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.anArtifactDefinition;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.anArtifactId;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.anOperation;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.someArtifacts;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.someComponentInstances;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.someInterfaces;
+import static org.openecomp.sdc.be.components.impl.utils.TestDataUtils.someOperations;
+
+import java.util.Map;
+import org.junit.jupiter.api.Test;
+import org.openecomp.sdc.be.datatypes.enums.ComponentTypeEnum;
+import org.openecomp.sdc.be.model.Component;
+import org.openecomp.sdc.be.model.ComponentInstance;
+import org.openecomp.sdc.be.model.InterfaceDefinition;
+import org.openecomp.sdc.be.model.Operation;
+import org.openecomp.sdc.be.model.Service;
+
+public class ComponentUtilsTest {
+
+ private static final String ARTIFACT_ID = "SomeArtifactId";
+
+ @Test
+ public void checkArtifactInComponentShouldReturnFalseWhenNoConditionsAreMet() {
+ assertFalse(checkArtifactInComponent(aComponent(), ARTIFACT_ID));
+ }
+
+ @Test
+ public void checkArtifactInComponentShouldReturnTrueWhenOneArtifactHasQueriedId() {
+ Component component = aComponent();
+ component.setArtifacts(someArtifacts(anArtifactDefinition(ARTIFACT_ID)));
+ assertTrue(checkArtifactInComponent(component, ARTIFACT_ID));
+ }
+
+ @Test
+ public void checkArtifactInComponentShouldReturnTrueWhenOneDeploymentArtifactHasQueriedId() {
+ Component component = aComponent();
+ component.setDeploymentArtifacts(someArtifacts(anArtifactDefinition(ARTIFACT_ID)));
+ assertTrue(checkArtifactInComponent(component, ARTIFACT_ID));
+ }
+
+ @Test
+ public void checkArtifactInComponentShouldReturnTrueWhenOneToscaArtifactHasQueriedId() {
+ Component component = aComponent();
+ component.setToscaArtifacts(someArtifacts(anArtifactDefinition(ARTIFACT_ID)));
+ assertTrue(checkArtifactInComponent(component, ARTIFACT_ID));
+ }
+
+ @Test
+ public void checkArtifactInComponentShouldReturnTrueWhenOneOperationHasQueriedId() {
+ Component component = aComponent();
+ component.setInterfaces(someInterfaces(anInterfaceDefinition(ARTIFACT_ID)));
+ assertTrue(checkArtifactInComponent(component, ARTIFACT_ID));
+ }
+
+ private static InterfaceDefinition anInterfaceDefinition(String artifactUniqueId) {
+ Map<String, Operation> operations = someOperations(
+ anOperation(aUniqueId(), anArtifactDefinition(artifactUniqueId)));
+
+ InterfaceDefinition id = new InterfaceDefinition();
+ id.setOperationsMap(operations);
+
+ return id;
+ }
+
+ @Test
+ public void checkArtifactInComponentShouldReturnTrueWhenServiceHasArtifactsWithQueriedId() {
+ Service service = new Service();
+ service.setComponentType(ComponentTypeEnum.SERVICE);
+ service.setServiceApiArtifacts(someArtifacts(anArtifactDefinition(ARTIFACT_ID)));
+
+ assertTrue(checkArtifactInComponent(service, ARTIFACT_ID));
+ }
+
+ @Test
+ public void checkArtifactInResourceInstanceShouldReturnFalseWhenNoConditionIsMet() {
+ assertFalse(checkArtifactInResourceInstance(aComponent(), aResourceInstanceId(), anArtifactId()));
+ }
+
+ @Test
+ public void checkArtifactInResourceInstanceShouldReturnTrueWhenResourceHasQueriedIdAndDeploymentArtifactId() {
+ ComponentInstance ci = aComponentInstance(aResourceInstanceId());
+ ci.setDeploymentArtifacts(someArtifacts(anArtifactDefinition(ARTIFACT_ID)));
+
+ Component component = aComponent();
+ component.setComponentInstances(someComponentInstances(ci));
+
+ assertTrue(checkArtifactInResourceInstance(component, ci.getUniqueId(), ARTIFACT_ID));
+ }
+
+ @Test
+ public void checkArtifactInResourceInstanceShouldReturnTrueWhenResourceHasQueriedIdAndArtifactId() {
+ ComponentInstance ci = aComponentInstance(aResourceInstanceId());
+ ci.setArtifacts(someArtifacts(anArtifactDefinition(ARTIFACT_ID)));
+
+ Component component = aComponent();
+ component.setComponentInstances(someComponentInstances(ci));
+
+ assertTrue(checkArtifactInResourceInstance(component, ci.getUniqueId(), ARTIFACT_ID));
+ }
+}
diff --git a/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/utils/TestDataUtils.java b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/utils/TestDataUtils.java
new file mode 100644
index 0000000000..bc7d57a8cc
--- /dev/null
+++ b/catalog-be/src/test/java/org/openecomp/sdc/be/components/impl/utils/TestDataUtils.java
@@ -0,0 +1,185 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * SDC
+ * ================================================================================
+ * Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://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.
+ * ============LICENSE_END=========================================================
+ */
+
+package org.openecomp.sdc.be.components.impl.utils;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Random;
+import java.util.function.Function;
+import org.openecomp.sdc.be.datatypes.elements.ArtifactDataDefinition;
+import org.openecomp.sdc.be.model.ArtifactDefinition;
+import org.openecomp.sdc.be.model.Component;
+import org.openecomp.sdc.be.model.ComponentInstance;
+import org.openecomp.sdc.be.model.InterfaceDefinition;
+import org.openecomp.sdc.be.model.Operation;
+import org.openecomp.sdc.be.model.Product;
+import org.openecomp.sdc.be.model.Resource;
+import org.openecomp.sdc.be.model.Service;
+
+/**
+ * This class provides some utility functions to generate close to randomized data for testing purpose.
+ */
+public class TestDataUtils {
+
+ private TestDataUtils() {
+ }
+
+ /**
+ * Generates a random {@code Component}
+ */
+ public static Component aComponent() {
+ return oneOf(new Resource(), new Service(), new Product());
+ }
+
+ /**
+ * Generates a random map of {@code ArtifactDefinition}
+ */
+ public static Map<String, ArtifactDefinition> someArtifacts(ArtifactDefinition a, ArtifactDefinition... as) {
+ return some(ArtifactDataDefinition::getUniqueId, a, as);
+ }
+
+ /**
+ * Generates a random {@code ArtifactDefinition} provided with a unique id
+ */
+ public static ArtifactDefinition anArtifactDefinition(String uniqueId) {
+ ArtifactDefinition ad = new ArtifactDefinition();
+ ad.setUniqueId(uniqueId);
+ return ad;
+ }
+
+ /**
+ * Converts n {@code ComponentInstance} to {@code List<ComponentInstance>}
+ */
+ public static List<ComponentInstance> someComponentInstances(ComponentInstance ci, ComponentInstance... cis) {
+ return varargs(ci, cis);
+ }
+
+ /**
+ * Generates a random {@code ComponentInstance} provided with a unique id
+ */
+ public static ComponentInstance aComponentInstance(String uniqueId) {
+ ComponentInstance ci = new ComponentInstance();
+ ci.setUniqueId(uniqueId);
+ return ci;
+ }
+
+ /**
+ * Converts n {@code Operation} to {@code List<Operation>}
+ */
+ public static Map<String, Operation> someOperations(Operation o, Operation... os) {
+ return some(Operation::getUniqueId, o, os);
+ }
+
+ /**
+ * Generates a random {@code Operation} provided with a unique id and an implementation
+ */
+ public static Operation anOperation(String uniqueId, ArtifactDefinition implementation) {
+ Operation o = new Operation();
+ o.setUniqueId(uniqueId);
+ o.setImplementation(implementation);
+ return o;
+ }
+
+ /**
+ * Converts n {@code InterfaceDefinition} to a {@code Map<String, InterfaceDefinition>}
+ */
+ public static Map<String, InterfaceDefinition> someInterfaces(InterfaceDefinition a, InterfaceDefinition... as) {
+ return some(InterfaceDefinition::getUniqueId, a, as);
+ }
+
+ /**
+ * Generates a {@code Map} given a function to generate a key from a value, along with the values to put in the
+ * resulting {@code Map}.
+ *
+ * @param keyMapper A function to generate a key from a value
+ * @param v0 The first element to put in the {@code Map}
+ * @param vs The other elements to put on the {@code Map}
+ * @param <K> The type of a key
+ * @param <V> The type of a value
+ */
+ @SafeVarargs
+ public static <K, V> Map<K, V> some(Function<V, K> keyMapper, V v0, V... vs) {
+ HashMap<K, V> m = new HashMap<>();
+ for (V v : varargs(v0, vs)) {
+ m.put(keyMapper.apply(v), v);
+ }
+ return m;
+ }
+
+ /**
+ * Alias for {@code aUniqueId}
+ */
+ public static String anArtifactId() {
+ return alphaNum(10);
+ }
+
+ /**
+ * Alias for {@code aUniqueId}
+ */
+ public static String aResourceInstanceId() {
+ return alphaNum(10);
+ }
+
+ /**
+ * Generates a uniqueId
+ */
+ public static String aUniqueId() {
+ return alphaNum(10);
+ }
+
+ /**
+ * Generates an alphanumeric string
+ *
+ * @param size The size of the {@code String} returned
+ */
+ public static String alphaNum(int size) {
+ return alphaNum("", size, new Random());
+ }
+
+ private static String alphaNum(String acc, int rem, Random r) {
+ if (rem == 0) {
+ return acc;
+ } else {
+ String alphaNum = "0123456789abcdefghijklmnopqrstuvwxyz";
+ return alphaNum(acc + alphaNum.charAt(r.nextInt(alphaNum.length())), rem - 1, r);
+ }
+ }
+
+ /**
+ * Randomly selects one value among the ones provided
+ */
+ @SafeVarargs
+ public static <A> A oneOf(A a, A... as) {
+ List<A> as0 = varargs(a, as);
+ Random r = new Random();
+ return as0.get(r.nextInt(as0.size()));
+ }
+
+ @SafeVarargs
+ private static <A> List<A> varargs(A a, A... as) {
+ ArrayList<A> as0 = new ArrayList<>(Arrays.asList(as));
+ as0.add(a);
+ return as0;
+ }
+}