default instance (#318)

Author: SentryMan

blackbox-test/src/test/java/example/avaje/cascade/AShipTest.java

@@ -15,7 +15,7 @@
 
 class AShipTest {
 
-  Validator validator = Validator.builder().build();
+  Validator validator = Validator.instance();
 
   @Test
   void valid() {

validator/src/main/java/io/avaje/validation/Validator.java

@@ -107,6 +107,16 @@ static Builder builder() {
     return DefaultBootstrap.builder();
   }
 
+  /**
+   * Get the default Validator instance with all generated adapters configured.
+   *
+   * <p>This is a faster alternative to {@code Validator.builder().build()} that will return the
+   * same singleton instance.
+   */
+  static Validator instance() {
+    return DefaultBootstrap.instance();
+  }
+
   /** Build the Validator instance adding ValidationAdapter, Factory or AdapterBuilder. */
   interface Builder {
 

validator/src/main/java/io/avaje/validation/core/DValidator.java

@@ -31,7 +31,6 @@
 import io.avaje.validation.adapter.ValidationRequest;
 import io.avaje.validation.spi.AdapterFactory;
 import io.avaje.validation.spi.AnnotationFactory;
-import io.avaje.validation.spi.GeneratedComponent;
 import io.avaje.validation.spi.MessageInterpolator;
 import io.avaje.validation.spi.ValidatorCustomizer;
 
@@ -180,7 +179,7 @@ String interpolate(Message msg, Locale requestLocale) {
   static final class DBuilder implements Validator.Builder {
 
     private static final Supplier<Clock> DEFAULT_CLOCK = Clock::systemDefaultZone;
-    private static final Validator DEFAULT = Validator.builder().build();
+    static final Validator DEFAULT = Validator.builder().build();
 
     private final List<AdapterFactory> factories = new ArrayList<>();
     private final List<AnnotationFactory> afactories = new ArrayList<>();

validator/src/main/java/io/avaje/validation/core/DefaultBootstrap.java

@@ -10,4 +10,8 @@ private DefaultBootstrap() {}
   public static Validator.Builder builder() {
     return new DValidator.DBuilder();
   }
+
+  public static Validator instance() {
+    return DValidator.DBuilder.DEFAULT;
+  }
 }