Use dynamic profiles when testing the assembled JAR

This prevents unsupported runtime flags being used in Java8
during test execution using the Maven surefire plugin.

datasketches-memory-java9-tests/pom.xml

@@ -67,9 +67,6 @@
                         --add-opens java.base/jdk.internal.misc=org.apache.datasketches.memory
                         --add-exports org.apache.datasketches.memory.tests/org.apache.datasketches.memory.test=org.testng
                     </argLine>
-                    <jdkToolchain>
-                        <version>9</version>
-                    </jdkToolchain>
                 </configuration>
             </plugin>
 

datasketches-memory-tests/pom.xml

@@ -48,35 +48,97 @@
   <artifactId>datasketches-memory-tests</artifactId>
   <name>${project.artifactId}</name>
 
+  <properties>
+    <maven.install.skip>true</maven.install.skip>
+    <maven.javadoc.skip>true</maven.javadoc.skip>
+    <jdk-toolchain.version>11</jdk-toolchain.version>
+    <maven.compiler.source>${java.version}</maven.compiler.source>
+    <maven.compiler.target>${java.version}</maven.compiler.target>
+  </properties>
+
   <!-- The tests in the following profiles run against the assembled MR-JAR.  Hence, they
-       only run during the Maven package phase.
-       Tests are scanned from dependency JARs using `dependenciesToScan`. -->
-  <build>
-    <plugins>
+       only run during the Maven package phase. Different profiles are selected based on
+       the environment-specific version of Java that was used to run `mvn package`.  This
+       is because the new JPMS runtime arguments result in a catastrophic system error whilst
+       using Java 8. Tests are scanned from dependency JARs using `dependenciesToScan`. -->
+  <profiles>
+    <profile>
+      <id>java8</id>
+      <activation>
+        <jdk>11</jdk>
+      </activation>
+
+      <build>
+        <pluginManagement>
+          <plugins>
+
+            <plugin>
+              <!-- Apache Parent pom, pluginManagement-->
+              <groupId>org.apache.maven.plugins</groupId>
+              <artifactId>maven-surefire-plugin</artifactId>
+              <version>${maven-surefire-plugin.version}</version>
+              <executions>
+                <execution>
+                  <id>package-test</id>
+                  <phase>package</phase>
+                  <goals>
+                    <goal>test</goal>
+                  </goals>
+                  <configuration>
+                    <skip>false</skip>
+                    <dependenciesToScan>
+                      <dependency>org.apache.datasketches:datasketches-memory-java8-tests</dependency>
+                    </dependenciesToScan>
+                  </configuration>
+                </execution>
+              </executions>
+            </plugin>
+          </plugins>
+        </pluginManagement>
+      </build>
+    </profile>
+
+    <profile>
+      <id>java9to14</id>
+      <activation>
+        <jdk>[9,14)</jdk>
+      </activation>
 
-      <plugin>
-        <!-- Apache Parent pom, pluginManagement-->
-        <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-surefire-plugin</artifactId>
-        <version>${maven-surefire-plugin.version}</version>
-        <executions>
-          <execution>
-            <id>package-test</id>
-            <phase>package</phase>
-            <goals>
-              <goal>test</goal>
-            </goals>
-            <configuration>
-              <skip>false</skip>
-              <dependenciesToScan>
-                <dependency>org.apache.datasketches:datasketches-memory-java8-tests</dependency>
-              </dependenciesToScan>
-            </configuration>
-          </execution>
-        </executions>
-      </plugin>
+      <build>
+        <pluginManagement>
+          <plugins>
 
-    </plugins>
-  </build>
+            <plugin>
+              <!-- Apache Parent pom, pluginManagement-->
+              <groupId>org.apache.maven.plugins</groupId>
+              <artifactId>maven-surefire-plugin</artifactId>
+              <version>${maven-surefire-plugin.version}</version>
+              <executions>
+                <execution>
+                  <id>package-test</id>
+                  <phase>package</phase>
+                  <goals>
+                    <goal>test</goal>
+                  </goals>
+                  <configuration>
+                    <skip>false</skip>
+                    <argLine>
+                      --add-opens java.base/java.nio=ALL-UNNAMED
+                      --add-opens java.base/jdk.internal.misc=ALL-UNNAMED
+                      --add-opens java.base/jdk.internal.ref=ALL-UNNAMED
+                      --add-opens org.apache.datasketches.memory/org.apache.datasketches.memory.internal=ALL-UNNAMED
+                    </argLine>
+                    <dependenciesToScan>
+                      <dependency>org.apache.datasketches:datasketches-memory-java8-tests</dependency>
+                    </dependenciesToScan>
+                  </configuration>
+                </execution>
+              </executions>
+            </plugin>
+          </plugins>
+        </pluginManagement>
+      </build>
+    </profile>
+  </profiles>
 
 </project>

datasketches-memory/pom.xml

@@ -123,6 +123,12 @@
               <descriptors>
                 <descriptor>src/assembly/assemble-mr-jar.xml</descriptor>
               </descriptors>
+              <!-- The class loader requires this to be set in a multi-release JAR's manifest -->
+              <archive>
+                <manifestEntries>
+                  <Multi-Release>true</Multi-Release>
+                </manifestEntries>
+              </archive>
             </configuration>
           </execution>