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/*
* Copyright (c) 1998, 2006, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
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* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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*/
package java.sql;
/**
* The mapping in the Java programming language of an SQL REF
* value, which is a reference to an SQL structured type value in the database.
*
* SQL REF
values are stored in a table that contains
* instances of a referenceable SQL structured type, and each REF
* value is a unique identifier for one instance in that table.
* An SQL REF
value may be used in place of the
* SQL structured type it references, either as a column value in a
* table or an attribute value in a structured type.
*
* Because an SQL REF
value is a logical pointer to an
* SQL structured type, a Ref
object is by default also a logical
* pointer. Thus, retrieving an SQL REF
value as
* a Ref
object does not materialize
* the attributes of the structured type on the client.
*
* A Ref
object can be stored in the database using the
* PreparedStatement.setRef
method.
*
* All methods on the Ref
interface must be fully implemented if the
* JDBC driver supports the data type.
*
* @see Struct
* @since 1.2
*/
public interface Ref {
/**
* Retrieves the fully-qualified SQL name of the SQL structured type that
* this Ref
object references.
*
* @return the fully-qualified SQL name of the referenced SQL structured type
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
String getBaseTypeName() throws SQLException;
/**
* Retrieves the referenced object and maps it to a Java type
* using the given type map.
*
* @param map a java.util.Map
object that contains
* the mapping to use (the fully-qualified name of the SQL
* structured type being referenced and the class object for
* SQLData
implementation to which the SQL
* structured type will be mapped)
* @return a Java Object
that is the custom mapping for
* the SQL structured type to which this Ref
* object refers
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.4
* @see #setObject
*/
Object getObject(java.util.Map> map) throws SQLException;
/**
* Retrieves the SQL structured type instance referenced by
* this Ref
object. If the connection's type map has an entry
* for the structured type, the instance will be custom mapped to
* the Java class indicated in the type map. Otherwise, the
* structured type instance will be mapped to a Struct
object.
*
* @return a Java Object
that is the mapping for
* the SQL structured type to which this Ref
* object refers
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.4
* @see #setObject
*/
Object getObject() throws SQLException;
/**
* Sets the structured type value that this Ref
* object references to the given instance of Object
.
* The driver converts this to an SQL structured type when it
* sends it to the database.
*
* @param value an Object
representing the SQL
* structured type instance that this
* Ref
object will reference
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.4
* @see #getObject()
* @see #getObject(Map)
* @see PreparedStatement#setObject(int, Object)
* @see CallableStatement#setObject(String, Object)
*/
void setObject(Object value) throws SQLException;
}