fix for issue-1002

Author: trentjeff

maven-enforcer-rules/README.md

@@ -33,11 +33,11 @@ Here is an example pom.xml:
                             <helidonDependenciesRule>
                                 <namespace>JAKARTA | JAVAX</namespace>
                                  <!-- list of strings - can be used to exclude a package / group name from validation -->
-                                 <excludedGavRegExs>
-                                    <!-- for example only - we suggest not including this exclusion in your usage -->
-                                    <excludedGavRegEx>javax.servlet.*</excludedGavRegEx>
+<!--                                 <excludedGavRegExs>-->
+<!--                                    &lt;!&ndash; for example only - we suggest not including this exclusion in your usage &ndash;&gt;-->
+<!--                                    <excludedGavRegEx>javax.servlet.*</excludedGavRegEx>-->
                                  </excludedGavs>
-                            </helidonJakartaDependenciesRule>
+                            </helidonDependenciesRule>
                         </rules>
                     </configuration>
                 </execution>

maven-enforcer-rules/src/main/java/io/helidon/build/maven/enforcer/rules/HelidonDependenciesRule.java

@@ -16,7 +16,9 @@
 
 package io.helidon.build.maven.enforcer.rules;
 
+import java.util.ArrayList;
 import java.util.List;
+import java.util.Objects;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
@@ -68,6 +70,10 @@ public class HelidonDependenciesRule extends AbstractEnforcerRule {
 
     @Override
     public void execute() throws ViolationException {
+        if (this.excludedGavRegExs == null) {
+            this.excludedGavRegExs = List.of();
+        }
+
         String namespace = checkNamespace(this.namespace);
         List<Pattern> excludedGavRegExs = this.excludedGavRegExs.stream()
                 .map(Pattern::compile)
@@ -86,6 +92,14 @@ public String toString() {
         return String.format(getClass().getSimpleName() + "[namespace=%s, excludedGavRegExs=%s]", namespace, excludedGavRegExs);
     }
 
+    void setProject(MavenProject project) {
+        this.project = Objects.requireNonNull(project);
+    }
+
+    void setExcludedGavRegExs(List<String> excludedGavRegExs) {
+        this.excludedGavRegExs = new ArrayList<>(Objects.requireNonNull(excludedGavRegExs));
+    }
+
     static String checkNamespace(String namespace) {
         if (namespace == null || namespace.isBlank()) {
             return JAKARTA;

maven-enforcer-rules/src/test/java/io/helidon/build/maven/enforcer/rules/HelidonDependencyRuleTest.java

@@ -16,11 +16,26 @@
 
 package io.helidon.build.maven.enforcer.rules;
 
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+import java.util.function.Supplier;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+import org.apache.maven.artifact.Artifact;
+import org.apache.maven.enforcer.rule.api.EnforcerLogger;
+import org.apache.maven.project.MavenProject;
 import org.junit.jupiter.api.Test;
 
 import static io.helidon.build.maven.enforcer.rules.HelidonDependenciesRule.checkNamespace;
 import static org.hamcrest.CoreMatchers.equalTo;
+import static org.hamcrest.CoreMatchers.is;
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsInAnyOrder;
+import static org.hamcrest.Matchers.startsWith;
 import static org.junit.jupiter.api.Assertions.assertThrows;
 
 class HelidonDependencyRuleTest {
@@ -40,4 +55,105 @@ void testCheckNamespace() {
                    equalTo("The namespace 'java' is invalid. Only valid namespace names are: 'jakarta' and 'javax'."));
     }
 
+    @Test
+    void emptyGavExceptions() throws Exception {
+        MavenProject project = new MavenProject();
+        Set<Artifact> artifacts =
+                Stream.of("javax.inject:javax.inject:1",
+                          "javax.crypto:javax.crypto:1",
+                          "javax.servlet:javax.servlet-api:2.1.0",
+                          "other.servlet:other.servlet:1")
+                        .map(DependencyIsValidCheck::toArtifact)
+                        .collect(Collectors.toSet());
+        project.setArtifacts(artifacts);
+
+        HelidonDependenciesRule rule =
+                new HelidonDependenciesRule();
+        rule.setLog(new TestingLogger());
+        rule.setProject(project);
+
+        ViolationException e = assertThrows(ViolationException.class, rule::execute);
+        assertThat(e.violations().size(), is(2));
+
+        List<String> allowedList = new ArrayList<>();
+        allowedList.add("");
+        rule.setExcludedGavRegExs(allowedList);
+        e = assertThrows(ViolationException.class, rule::execute);
+        assertThat(e.violations().size(), is(2));
+    }
+
+    static class TestingLogger implements EnforcerLogger {
+        static final Logger LOGGER = Logger.getLogger(TestingLogger.class.getName());
+
+        @Override
+        public void warnOrError(CharSequence charSequence) {
+            LOGGER.warning(charSequence.toString());
+        }
+
+        @Override
+        public void warnOrError(Supplier<CharSequence> supplier) {
+            warnOrError(supplier.get());
+        }
+
+        @Override
+        public boolean isDebugEnabled() {
+            return LOGGER.isLoggable(Level.FINE);
+        }
+
+        @Override
+        public void debug(CharSequence charSequence) {
+            LOGGER.log(Level.FINE, charSequence.toString());
+        }
+
+        @Override
+        public void debug(Supplier<CharSequence> supplier) {
+            debug(supplier.get());
+        }
+
+        @Override
+        public boolean isInfoEnabled() {
+            return LOGGER.isLoggable(Level.INFO);
+        }
+
+        @Override
+        public void info(CharSequence charSequence) {
+            LOGGER.log(Level.INFO, charSequence.toString());
+        }
+
+        @Override
+        public void info(Supplier<CharSequence> supplier) {
+            info(supplier.get());
+        }
+
+        @Override
+        public boolean isWarnEnabled() {
+            return LOGGER.isLoggable(Level.WARNING);
+        }
+
+        @Override
+        public void warn(CharSequence charSequence) {
+            LOGGER.log(Level.WARNING, charSequence.toString());
+        }
+
+        @Override
+        public void warn(Supplier<CharSequence> supplier) {
+            warn(supplier.get());
+        }
+
+        @Override
+        public boolean isErrorEnabled() {
+            return LOGGER.isLoggable(Level.SEVERE);
+        }
+
+        @Override
+        public void error(CharSequence charSequence) {
+            LOGGER.log(Level.SEVERE, charSequence.toString());
+        }
+
+        @Override
+        public void error(Supplier<CharSequence> supplier) {
+            error(supplier.get());
+        }
+    }
+
 }