Also strip Command and Cmd from the beginning of a class name for the default alias

Author: Vampire

readme/README_template.md

@@ -160,8 +160,8 @@ call the methods on the command implementation.
 
 By overwriting the `Command#getAliases()` method or applying one or multiple [`@Alias`][@Alias JavaDoc] annotations the
 aliases to which the command reacts can be configured. If at least one alias is configured, only the explicitly
-configured ones are available. If no alias is configured, the class name, stripped by `Command` or `Cmd` suffix
-and the first letter lowercased is used as default.
+configured ones are available. If no alias is configured, the class name, stripped by `Command` or `Cmd`
+suffix and / or prefix and the first letter lowercased is used as default.
 
 #### Asynchronous Command Execution
 

src/main/java/net/kautler/command/api/Command.java

@@ -66,7 +66,7 @@ public interface Command<M> {
      *
      * <p>The default implementation of this method returns the aliases configured using the {@link Alias @Alias}
      * annotation. If no alias is configured by annotation, the class name, stripped by {@code Command} or {@code Cmd}
-     * suffix if present and the first letter lowercased is used as default.
+     * suffix and / or prefix if present and the first letter lowercased is used as default.
      *
      * <p>If this method is overwritten and there are annotations, the method overwrite takes precedence.
      *
@@ -89,9 +89,8 @@ default List<String> getAliases() {
         if (className.isEmpty()) {
             className = clazz.getTypeName().substring(clazz.getPackage().getName().length() + 1);
         }
-        String defaultAlias = className
-                .replaceFirst("(?i)(?:Command|Cmd)$", "")
-                .replaceFirst("^.", Character.toString(toLowerCase(className.charAt(0))));
+        String defaultAlias = className.replaceAll("(?i)^(?:Command|Cmd)|(?:Command|Cmd)$", "");
+        defaultAlias = defaultAlias.replaceFirst("^.", Character.toString(toLowerCase(defaultAlias.charAt(0))));
         return singletonList(defaultAlias);
     }
 

src/main/java/net/kautler/command/api/annotation/Alias.java

@@ -29,8 +29,8 @@
 /**
  * An annotation with which one or more aliases for a command can be configured.
  * If at least one alias is configured, only the explicitly configured ones are available.
- * If no alias is configured, the class name, stripped by {@code Command} or {@code Cmd} suffix if present
- * and the first letter lowercased is used as default.
+ * If no alias is configured, the class name, stripped by {@code Command} or {@code Cmd}
+ * suffix and / or prefix if present and the first letter lowercased is used as default.
  *
  * <p>Alternatively to using this annotation the {@link Command#getAliases()} method can be overwritten.
  * If that method is overwritten and this annotation is used, the method overwrite takes precedence.

src/pitest/java/net/kautler/test/pitest/ExplicitMutationFilterDetails.java

@@ -18,7 +18,6 @@
 
 import org.pitest.mutationtest.engine.MutationDetails;
 
-import java.util.Arrays;
 import java.util.Collection;
 import java.util.Objects;
 import java.util.StringJoiner;

src/test/groovy/net/kautler/command/api/CommandTest.groovy

@@ -53,7 +53,10 @@ class CommandTest extends Specification {
             new Test4()           || ['test']
             new Test5()           || ['test1', 'test2']
             new Test6()           || ['Test1', 'Test2']
-            new BaseCommand() { } || [testee.getClass().typeName[(testee.getClass().package.name.length() + 1)..-1].uncapitalize()]
+            new CommandTest7()    || ['test7']
+            new CmdTest8()        || ['test8']
+            new CommandTest9Cmd() || ['test9']
+            new BaseCommand() { } || [testee.getClass().typeName[(testee.getClass().package.name.length() + 8)..-1].uncapitalize()]
 
         and:
             aliases = expectedAliases.size() == 1 ? 'alias' : 'aliases'
@@ -182,7 +185,7 @@ class CommandTest extends Specification {
 
     def 'multiple restrictions with ALL_OF policy should require all those restrictions'() {
         given:
-            def testee = new Test7()
+            def testee = new CommandTest7()
             def testeeClass = testee.getClass()
 
         expect:
@@ -211,7 +214,7 @@ class CommandTest extends Specification {
 
     def 'multiple restrictions with ANY_OF policy should require one of those restrictions'() {
         given:
-            def testee = new Test8()
+            def testee = new CmdTest8()
             def testeeClass = testee.getClass()
 
         expect:
@@ -240,7 +243,7 @@ class CommandTest extends Specification {
 
     def 'multiple restrictions with NONE_OF policy should require all those restrictions negated'() {
         given:
-            def testee = new Test9()
+            def testee = new CommandTest9Cmd()
             def testeeClass = testee.getClass()
 
         expect:
@@ -295,7 +298,7 @@ class CommandTest extends Specification {
             }
 
         and:
-            def testee = new Test9()
+            def testee = new CommandTest9Cmd()
             def testeeClass = testee.getClass()
 
         expect:
@@ -379,19 +382,19 @@ class CommandTest extends Specification {
     @RestrictedTo(Restriction2)
     @RestrictedTo(Restriction3)
     @RestrictionPolicy(ALL_OF)
-    static class Test7 extends BaseCommand { }
+    static class CommandTest7 extends BaseCommand { }
 
     @RestrictedTo(Restriction1)
     @RestrictedTo(Restriction2)
     @RestrictedTo(Restriction3)
     @RestrictionPolicy(ANY_OF)
-    static class Test8 extends BaseCommand { }
+    static class CmdTest8 extends BaseCommand { }
 
     @RestrictedTo(Restriction1)
     @RestrictedTo(Restriction2)
     @RestrictedTo(Restriction3)
     @RestrictionPolicy(NONE_OF)
-    static class Test9 extends BaseCommand { }
+    static class CommandTest9Cmd extends BaseCommand { }
 
     static class BaseRestriction implements Restriction<Object> {
         @Override