HHH-2412 - Support for JDBC4

git-svn-id: https://svn.jboss.org/repos/hibernate/core/trunk@17771 1b8cb986-b30d-0410-93ca-fae66ebed9b2

core/src/main/java/org/hibernate/engine/jdbc/JdbcSupport.java

@@ -0,0 +1,65 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2009 by Red Hat Inc and/or its affiliates or by
+ * third-party contributors as indicated by either @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.engine.jdbc;
+
+import java.sql.ResultSet;
+
+/**
+ * Isolates Hibernate interactions with JDBC in terms of variations between JDBC 3 (JDK 1.4 and 1.5)
+ * and JDBC 4 (JDK 1.6).
+ *
+ * @author Steve Ebersole
+ */
+public interface JdbcSupport {
+	/**
+	 * Creates an instance of a {@link LobCreator} that does not use the underlying JDBC {@link java.sql.Connection}
+	 * to create LOBs.
+	 * <p/>
+	 * This method is here solely to support the older, now-deprecated method of creating LOBs via
+	 * the various {@link org.hibernate.Hibernate#createBlob} and {@link org.hibernate.Hibernate#createClob} methods on
+	 * {@link org.hibernate.Hibernate}.
+	 *
+	 * @return The LOB creator.
+	 * @deprecated Use {@link #getLobCreator(LobCreationContext)} instead.
+	 */
+	public LobCreator getLobCreator();
+
+	/**
+	 * Create an instance of a {@link LobCreator} appropriate for the current envionment, mainly meant to account for
+	 * variance between JDBC 4 (<= JDK 1.6) and JDBC3 (>= JDK 1.5).
+	 *
+	 * @param lobCreationContext The context in which the LOB is being created
+	 * @return The LOB creator.
+	 */
+	public LobCreator getLobCreator(LobCreationContext lobCreationContext);
+
+	/**
+	 * Wrap the given {@link ResultSet} in one that caches the column-name -> column-index resolution.
+	 *
+	 * @param resultSet The {@link ResultSet} to wrap.
+	 * @param columnNameCache The resolution cache.
+	 * @return The wrapper.
+	 */
+	public ResultSet wrap(ResultSet resultSet, ColumnNameCache columnNameCache);
+}

core/src/main/java/org/hibernate/engine/jdbc/LobCreator.java

@@ -0,0 +1,106 @@
+/*
+ * Hibernate, Relational Persistence for Idiomatic Java
+ *
+ * Copyright (c) 2009 by Red Hat Inc and/or its affiliates or by
+ * third-party contributors as indicated by either @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.engine.jdbc;
+
+import java.sql.Blob;
+import java.sql.Clob;
+import java.io.InputStream;
+import java.io.Reader;
+
+/**
+ * Contract for creating various LOB references.
+ *
+ * @author Steve Ebersole
+ * @author Gail Badner
+ */
+public interface LobCreator {
+	/**
+	 * Wrap the given blob in a serializable wrapper.
+	 *
+	 * @param blob The blob to be wrapped.
+	 * @return The wrapped blob which will be castable to {@link Blob} as well as {@link WrappedBlob}.
+	 */
+	public Blob wrap(Blob blob);
+
+	/**
+	 * Wrap the given clob in a serializable wrapper.
+	 *
+	 * @param clob The clob to be wrapped.
+	 * @return The wrapped clob which will be castable to {@link Clob} as well as {@link WrappedClob}.
+	 */
+	public Clob wrap(Clob clob);
+
+	/**
+	 * Create a BLOB reference encapsulating the given byte array.
+	 *
+	 * @param bytes The byte array to wrap as a blob.
+	 * @return The created blob, castable to {@link Blob} as well as {@link BlobImplementer}
+	 */
+	public Blob createBlob(byte[] bytes);
+
+	/**
+	 * Create a BLOB reference encapsulating the given binary stream.
+	 *
+	 * @param stream The binary stream to wrap as a blob.
+	 * @param length The length of the stream.
+	 * @return The created blob, castable to {@link Blob} as well as {@link BlobImplementer}
+	 */
+	public Blob createBlob(InputStream stream, long length);
+
+	/**
+	 * Create a CLOB reference encapsulating the given String data.
+	 *
+	 * @param string The String to wrap as a clob.
+	 * @return The created clob, castable to {@link Clob} as well as {@link ClobImplementer}
+	 */
+	public Clob createClob(String string);
+
+	/**
+	 * Create a CLOB reference encapsulating the given character data.
+	 *
+	 * @param reader The character data reader.
+	 * @param length The length of the reader data.
+	 * @return The created clob, castable to {@link Clob} as well as {@link ClobImplementer}
+	 */
+	public Clob createClob(Reader reader, long length);
+
+	/**
+	 * Create a NCLOB reference encapsulating the given String data.
+	 *
+	 * @param string The String to wrap as a NCLOB.
+	 * @return The created NCLOB, castable as {@link Clob} as well as {@link NClobImplementer}.  In JDK 1.6
+	 * environments, also castable to java.sql.NClob
+	 */
+	public Clob createNClob(String string);
+
+	/**
+	 * Create a NCLOB reference encapsulating the given character data.
+	 *
+	 * @param reader The character data reader.
+	 * @param length The length of the reader data.
+	 * @return The created NCLOB, castable as {@link Clob} as well as {@link NClobImplementer}.  In JDK 1.6
+	 * environments, also castable to java.sql.NClob
+	 */
+	public Clob createNClob(Reader reader, long length);
+}