NullPointerException thrown when no linter matched a file

plugin/src/main/java/org/ec4j/maven/AbstractEditorConfigMojo.java

@@ -264,16 +264,18 @@ public void execute() throws MojoExecutionException, MojoFailureException {
                     }
                     final Resource resource = new Resource(absFile, file, useEncoding);
                     final List<Linter> filteredLinters = linterRegistry.filter(file);
-                    ViolationHandler.ReturnState state = ViolationHandler.ReturnState.RECHECK;
-                    while (state != ViolationHandler.ReturnState.FINISHED) {
-                        for (Linter linter : filteredLinters) {
-                            if (log.isTraceEnabled()) {
-                                log.trace("Processing file '{}' using linter {}", file, linter.getClass().getName());
+                    if (!filteredLinters.isEmpty()) {
+                        ViolationHandler.ReturnState state = ViolationHandler.ReturnState.RECHECK;
+                        while (state != ViolationHandler.ReturnState.FINISHED) {
+                            for (Linter linter : filteredLinters) {
+                                if (log.isTraceEnabled()) {
+                                    log.trace("Processing file '{}' using linter {}", file, linter.getClass().getName());
+                                }
+                                handler.startFile(resource);
+                                linter.process(resource, editorConfigProperties, handler);
                             }
-                            handler.startFile(resource);
-                            linter.process(resource, editorConfigProperties, handler);
+                            state = handler.endFile();
                         }
-                        state = handler.endFile();
                     }
                 }
             }

plugin/src/main/java/org/ec4j/maven/LinterConfig.java

@@ -33,6 +33,14 @@ public class LinterConfig {
     private String[] includes;
     private boolean useDefaultIncludesAndExcludes = true;
 
+    public LinterConfig() {
+    }
+
+    public LinterConfig(String id, boolean enabled) {
+        this.id = id;
+        this.enabled = enabled;
+    }
+
     public String getClassName() {
         return className.indexOf('.') < 0 ? TextLinter.class.getPackage().getName() + "." + className + "Linter"
                 : className;

pom.xml

@@ -84,7 +84,7 @@
         <maven-project.version>3.0-alpha-2</maven-project.version>
         <maven.plugin-tools.version>3.15.2</maven.plugin-tools.version>
         <maven-shared-utils.version>3.4.2</maven-shared-utils.version>
-        <ec4j-core.version>1.1.1</ec4j-core.version>
+        <ec4j-core.version>1.2.0</ec4j-core.version>
         <ec4j-linters.version>2.2.2</ec4j-linters.version>
         <slf4j.version>2.0.17</slf4j.version>
 

test/src/test/java/org/ec4j/maven/EditorConfigMojosTest.java

@@ -91,6 +91,22 @@ public void check() throws Exception {
         ;
     }
 
+    @Test
+    public void allLintersDisabled() throws Exception {
+
+        final Verifier<EditorConfigFormatMojo> mavenExec = new Verifier<>(
+                "defaults",
+                EditorConfigFormatMojo.class,
+                Arrays.asList("log.txt"));
+
+        mavenExec.mojo.linters = Arrays.asList(new LinterConfig("org.ec4j.linters.TextLinter", false),
+                new LinterConfig("org.ec4j.linters.XmlLinter", false));
+
+        mavenExec //
+                .execute() //
+                .assertErrorFreeLog();
+    }
+
     @Test
     public void encoding() throws Exception {
         final Verifier<EditorConfigCheckMojo> mavenExec = new Verifier<EditorConfigCheckMojo>(