HHH-18414 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/attributebinder/Foo.java

@@ -0,0 +1,27 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.orm.test.mapping.attributebinder;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.Target;
+
+import org.hibernate.annotations.AttributeBinderType;
+
+import static java.lang.annotation.ElementType.FIELD;
+import static java.lang.annotation.ElementType.METHOD;
+import static java.lang.annotation.RetentionPolicy.RUNTIME;
+
+/**
+ * Dummy annotation to verify binders are called only once.
+ *
+ * @author Yanming Zhou
+ */
+@Target({METHOD,FIELD})
+@Retention(RUNTIME)
+@AttributeBinderType( binder = FooBinder.class )
+public @interface Foo {
+}

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/attributebinder/FooBinder.java

@@ -0,0 +1,38 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * License: GNU Lesser General Public License (LGPL), version 2.1 or later
+ * See the lgpl.txt file in the root directory or http://www.gnu.org/licenses/lgpl-2.1.html
+ */
+package org.hibernate.orm.test.mapping.attributebinder;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+import org.hibernate.binder.AttributeBinder;
+import org.hibernate.boot.spi.MetadataBuildingContext;
+import org.hibernate.mapping.PersistentClass;
+import org.hibernate.mapping.Property;
+
+/**
+ * The binder to verify binders are called only once.
+ *
+ * @author Yanming Zhou
+ */
+public class FooBinder implements AttributeBinder<Foo> {
+
+	private static final Map<String, Foo> map = new ConcurrentHashMap<>();
+
+	@Override
+	public void bind(
+			Foo annotation,
+			MetadataBuildingContext buildingContext,
+			PersistentClass persistentClass,
+			Property property) {
+			String key = persistentClass.getClassName() + "." + property.getName();
+			Foo existing = map.putIfAbsent( key, annotation );
+			if ( existing == annotation ) {
+				throw new IllegalStateException( "AttributeBinder is called twice" );
+			}
+	}
+}

hibernate-core/src/test/java/org/hibernate/orm/test/mapping/attributebinder/System.java

@@ -19,6 +19,7 @@ public class System {
 	@Basic
 	public String name;
 	@YesNo
+	@Foo
 	public boolean active;
 
 	private System() {