HHH-7998 - Add TypeContributions contract

Conflicts:
	hibernate-core/src/main/java/org/hibernate/dialect/Dialect.java
	hibernate-core/src/main/java/org/hibernate/metamodel/internal/MetadataImpl.java
	hibernate-core/src/main/java/org/hibernate/metamodel/spi/TypeContributor.java

hibernate-core/src/main/java/org/hibernate/dialect/Dialect.java

@@ -77,7 +77,9 @@ import org.hibernate.internal.util.StringHelper;
 import org.hibernate.internal.util.collections.ArrayHelper;
 import org.hibernate.internal.util.io.StreamCopier;
 import org.hibernate.mapping.Column;
+import org.hibernate.metamodel.spi.TypeContributions;
 import org.hibernate.persister.entity.Lockable;
+import org.hibernate.service.ServiceRegistry;
 import org.hibernate.sql.ANSICaseFragment;
 import org.hibernate.sql.ANSIJoinFragment;
 import org.hibernate.sql.CaseFragment;
@@ -272,6 +274,10 @@ public abstract class Dialect implements ConversionContext {
 
 	// database type mapping support ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
+	public void contributeTypes(TypeContributions typeContributions, ServiceRegistry serviceRegistry) {
+		// by default, nothing to do
+	}
+
 	/**
 	 * Get the name of the database type associated with the given
 	 * {@link java.sql.Types} typecode.

hibernate-core/src/main/java/org/hibernate/metamodel/spi/TypeContributions.java

@@ -0,0 +1,41 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2012, Red Hat Inc. or third-party contributors as
+ * indicated by the @author tags or express copyright attribution
+ * statements applied by the authors.  All third-party contributions are
+ * distributed under license by Red Hat Inc.
+ *
+ * This copyrighted material is made available to anyone wishing to use, modify,
+ * copy, or redistribute it subject to the terms and conditions of the GNU
+ * Lesser General Public License, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this distribution; if not, write to:
+ * Free Software Foundation, Inc.
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA  02110-1301  USA
+ */
+package org.hibernate.metamodel.spi;
+
+import org.hibernate.type.BasicType;
+import org.hibernate.usertype.CompositeUserType;
+import org.hibernate.usertype.UserType;
+
+/**
+ * Defines the target contributing types, whether via dialects or {@link TypeContributor}
+ *
+ * @author Steve Ebersole
+ */
+public interface TypeContributions {
+	public void contributeType(BasicType type);
+
+	public void contributeType(UserType type, String[] keys);
+
+	public void contributeType(CompositeUserType type, String[] keys);
+}

hibernate-core/src/main/java/org/hibernate/metamodel/spi/TypeContributor.java

@@ -0,0 +1,41 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2012, Red Hat Inc. or third-party contributors as
+ * indicated by the @author tags or express copyright attribution
+ * statements applied by the authors.  All third-party contributions are
+ * distributed under license by Red Hat Inc.
+ *
+ * This copyrighted material is made available to anyone wishing to use, modify,
+ * copy, or redistribute it subject to the terms and conditions of the GNU
+ * Lesser General Public License, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this distribution; if not, write to:
+ * Free Software Foundation, Inc.
+ * 51 Franklin Street, Fifth Floor
+ * Boston, MA  02110-1301  USA
+ */
+package org.hibernate.metamodel.spi;
+
+import org.hibernate.service.ServiceRegistry;
+
+/**
+ * Contract for contributing types.
+ *
+ * @author Steve Ebersole
+ */
+public interface TypeContributor {
+	/**
+	 * Contribute types
+	 *
+	 * @param typeContributions The callback for adding contributed types
+	 * @param serviceRegistry The service registry
+	 */
+	public void contribute(TypeContributions typeContributions, ServiceRegistry serviceRegistry);
+}