Fix NPE in case of missed executor type

allure-generator/src/main/java/io/qameta/allure/ga/GaPlugin.java

@@ -156,15 +156,17 @@ private static Optional<String> getHostSafe(final String url) {
         return Optional.empty();
     }
 
-    private static String getExecutorType(final List<LaunchResults> launchesResults) {
+    /* package-private */
+    static String getExecutorType(final List<LaunchResults> launchesResults) {
         return launchesResults.stream()
                 .map(results -> results.<ExecutorInfo>getExtra(EXECUTORS_BLOCK_NAME))
                 .filter(Optional::isPresent)
+                .findFirst()
+                .filter(Optional::isPresent)
                 .map(Optional::get)
                 .map(ExecutorInfo::getType)
                 .map(String::trim)
                 .map(String::toLowerCase)
-                .findFirst()
                 .orElse(LOCAL);
     }
 

allure-generator/src/test/java/io/qameta/allure/ga/GaPluginTest.java

@@ -0,0 +1,76 @@
+/*
+ *  Copyright 2016-2023 Qameta Software OÜ
+ *
+ *  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.
+ */
+package io.qameta.allure.ga;
+
+import io.qameta.allure.DefaultLaunchResults;
+import io.qameta.allure.entity.ExecutorInfo;
+import io.qameta.allure.executor.ExecutorPlugin;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * @author charlie (Dmitry Baev).
+ */
+class GaPluginTest {
+
+    @Test
+    void shouldGetDefaultExecutor() {
+        final String executorType = GaPlugin.getExecutorType(
+                List.of(
+                        new DefaultLaunchResults(Set.of(), Map.of(), Map.of())
+                )
+        );
+
+        assertThat(executorType)
+                .isEqualTo("local");
+    }
+
+    @Test
+    void shouldProcessNullExecutor() {
+        final String executorType = GaPlugin.getExecutorType(
+                List.of(
+                        new DefaultLaunchResults(Set.of(), Map.of(), Map.of(
+                                ExecutorPlugin.EXECUTORS_BLOCK_NAME,
+                                new ExecutorInfo()
+                        ))
+                )
+        );
+
+        assertThat(executorType)
+                .isEqualTo("local");
+    }
+
+    @Test
+    void shouldProcessExecutor() {
+        final String executorType = GaPlugin.getExecutorType(
+                List.of(
+                        new DefaultLaunchResults(Set.of(), Map.of(), Map.of(
+                                ExecutorPlugin.EXECUTORS_BLOCK_NAME,
+                                new ExecutorInfo()
+                                        .setType("some executor type")
+                        ))
+                )
+        );
+
+        assertThat(executorType)
+                .isEqualTo("some executor type");
+    }
+}

gradle/quality-configs/pmd/pmd.xml

@@ -6,7 +6,7 @@
     <description>
         General Java quality rules.
     </description>
-    
+
     <!-- Best practices (https://pmd.github.io/pmd-6.0.1/pmd_rules_java_bestpractices.html) -->
     <rule ref="category/java/bestpractices.xml">
         <exclude name="AbstractClassWithoutAbstractMethod"/>
@@ -32,6 +32,7 @@
         <exclude name="CallSuperInConstructor"/>
         <exclude name="CommentDefaultAccessModifier"/>
         <exclude name="ConfusingTernary"/>
+        <exclude name="DefaultPackage"/>
         <exclude name="GenericsNaming"/>
         <exclude name="LinguisticNaming"/>
         <exclude name="LocalHomeNamingConvention"/> <!-- earlier j2ee group-->