Replace Selector by a modified copy of the PathSelector class of Maven core.

src/main/java/org/apache/maven/plugins/clean/Cleaner.java

@@ -32,6 +32,7 @@
 import java.nio.file.attribute.PosixFileAttributeView;
 import java.nio.file.attribute.PosixFilePermission;
 import java.util.ArrayDeque;
+import java.util.Arrays;
 import java.util.BitSet;
 import java.util.Deque;
 import java.util.EnumSet;
@@ -105,8 +106,12 @@ final class Cleaner implements FileVisitor<Path> {
     @Nonnull
     private final String fastMode;
 
+    /**
+     * Combination of includes and excludes path matchers.
+     * A {@code null} value means to include everything.
+     */
     @Nullable
-    private Selector selector;
+    private PathSelector selector;
 
     /**
      * Whether the base directory is excluded from the set of directories to delete.
@@ -205,7 +210,11 @@ final class Cleaner implements FileVisitor<Path> {
      * @throws IOException if a file/directory could not be deleted and {@code failOnError} is {@code true}
      */
     public void delete(@Nonnull Fileset fileset) throws IOException {
-        selector = new Selector(fileset);
+        selector = new PathSelector(
+                fileset.getDirectory(),
+                Arrays.asList(fileset.getIncludes()),
+                Arrays.asList(fileset.getExcludes()),
+                fileset.isUseDefaultExcludes());
         if (selector.isEmpty()) {
             selector = null;
         }

src/main/java/org/apache/maven/plugins/clean/Fileset.java

@@ -41,6 +41,11 @@ public class Fileset {
 
     private boolean useDefaultExcludes;
 
+    /**
+     * Creates an initially empty file set.
+     */
+    public Fileset() {}
+
     /**
      * {@return the base directory}.
      */
@@ -96,7 +101,7 @@ public boolean isUseDefaultExcludes() {
      * Appends the elements of the given array in the given buffer.
      * This is a helper method for {@link #toString()} implementations.
      *
-     * @param buffer the buffer where to add the elements
+     * @param buffer the buffer to add the elements to
      * @param label label identifying the array of elements to add
      * @param patterns the elements to append, or {@code null} if none
      */