/*
* Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* 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
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package java.sql;
/**
* The output stream for writing the attributes of a user-defined
* type back to the database. This interface, used
* only for custom mapping, is used by the driver, and its
* methods are never directly invoked by a programmer.
* <p>When an object of a class implementing the interface
* <code>SQLData</code> is passed as an argument to an SQL statement, the
* JDBC driver calls the method <code>SQLData.getSQLType</code> to
* determine the kind of SQL
* datum being passed to the database.
* The driver then creates an instance of <code>SQLOutput</code> and
* passes it to the method <code>SQLData.writeSQL</code>.
* The method <code>writeSQL</code> in turn calls the
* appropriate <code>SQLOutput</code> <i>writer</i> methods
* <code>writeBoolean</code>, <code>writeCharacterStream</code>, and so on)
* to write data from the <code>SQLData</code> object to
* the <code>SQLOutput</code> output stream as the
* representation of an SQL user-defined type.
* @since 1.2
*/
public interface SQLOutput {
//================================================================
// Methods for writing attributes to the stream of SQL data.
// These methods correspond to the column-accessor methods of
// java.sql.ResultSet.
//================================================================
/**
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeString(String x) throws SQLException;
/**
* Writes the next attribute to the stream as a Java boolean.
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeBoolean(boolean x) throws SQLException;
/**
* Writes the next attribute to the stream as a Java byte.
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeByte(byte x) throws SQLException;
/**
* Writes the next attribute to the stream as a Java short.
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeShort(short x) throws SQLException;
/**
* Writes the next attribute to the stream as a Java int.
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeInt(int x) throws SQLException;
/**
* Writes the next attribute to the stream as a Java long.
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeLong(long x) throws SQLException;
/**
* Writes the next attribute to the stream as a Java float.
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeFloat(float x) throws SQLException;
/**
* Writes the next attribute to the stream as a Java double.
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeDouble(double x) throws SQLException;
/**
* Writes the next attribute to the stream as a java.math.BigDecimal object.
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeBigDecimal(java.math.BigDecimal x) throws SQLException;
/**
* Writes the next attribute to the stream as an array of bytes.
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeBytes(byte[] x) throws SQLException;
/**
* Writes the next attribute to the stream as a java.sql.Date object.
* Writes the next attribute to the stream as a <code>java.sql.Date</code> object
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeDate(java.sql.Date x) throws SQLException;
/**
* Writes the next attribute to the stream as a java.sql.Time object.
* Writes the next attribute to the stream as a <code>java.sql.Date</code> object
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeTime(java.sql.Time x) throws SQLException;
/**
* Writes the next attribute to the stream as a java.sql.Timestamp object.
* Writes the next attribute to the stream as a <code>java.sql.Date</code> object
* in the Java programming language.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeTimestamp(java.sql.Timestamp x) throws SQLException;
/**
* Writes the next attribute to the stream as a stream of Unicode characters.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeCharacterStream(java.io.Reader x) throws SQLException;
/**
* Writes the next attribute to the stream as a stream of ASCII characters.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeAsciiStream(java.io.InputStream x) throws SQLException;
/**
* Writes the next attribute to the stream as a stream of uninterpreted
* bytes.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeBinaryStream(java.io.InputStream x) throws SQLException;
//================================================================
// Methods for writing items of SQL user-defined types to the stream.
// These methods pass objects to the database as values of SQL
// Structured Types, Distinct Types, Constructed Types, and Locator
// Types. They decompose the Java object(s) and write leaf data
// items using the methods above.
//================================================================
/**
* Writes to the stream the data contained in the given
* <code>SQLData</code> object.
* When the <code>SQLData</code> object is <code>null</code>, this
* method writes an SQL <code>NULL</code> to the stream.
* Otherwise, it calls the <code>SQLData.writeSQL</code>
* method of the given object, which
* writes the object's attributes to the stream.
* The implementation of the method <code>SQLData.writeSQL</code>
* calls the appropriate <code>SQLOutput</code> writer method(s)
* for writing each of the object's attributes in order.
* The attributes must be read from an <code>SQLInput</code>
* input stream and written to an <code>SQLOutput</code>
* output stream in the same order in which they were
* listed in the SQL definition of the user-defined type.
*
* @param x the object representing data of an SQL structured or
* distinct type
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeObject(SQLData x) throws SQLException;
/**
* Writes an SQL <code>REF</code> value to the stream.
*
* @param x a <code>Ref</code> object representing data of an SQL
* <code>REF</code> value
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeRef(Ref x) throws SQLException;
/**
* Writes an SQL <code>BLOB</code> value to the stream.
*
* @param x a <code>Blob</code> object representing data of an SQL
* <code>BLOB</code> value
*
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeBlob(Blob x) throws SQLException;
/**
* Writes an SQL <code>CLOB</code> value to the stream.
*
* @param x a <code>Clob</code> object representing data of an SQL
* <code>CLOB</code> value
*
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeClob(Clob x) throws SQLException;
/**
* Writes an SQL structured type value to the stream.
*
* @param x a <code>Struct</code> object representing data of an 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
*/
void writeStruct(Struct x) throws SQLException;
/**
* Writes an SQL <code>ARRAY</code> value to the stream.
*
* @param x an <code>Array</code> object representing data of an SQL
* <code>ARRAY</code> type
*
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.2
*/
void writeArray(Array x) throws SQLException;
//--------------------------- JDBC 3.0 ------------------------
/**
* Writes a SQL <code>DATALINK</code> value to the stream.
*
* @param x a <code>java.net.URL</code> object representing the data
* of SQL DATALINK type
*
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.4
*/
void writeURL(java.net.URL x) throws SQLException;
//--------------------------- JDBC 4.0 ------------------------
/**
* Writes the next attribute to the stream as a <code>String</code>
* in the Java programming language. The driver converts this to a
* SQL <code>NCHAR</code> or
* <code>NVARCHAR</code> or <code>LONGNVARCHAR</code> value
* (depending on the argument's
* size relative to the driver's limits on <code>NVARCHAR</code> values)
* when it sends it to the stream.
*
* @param x the value to pass to the database
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.6
*/
void writeNString(String x) throws SQLException;
/**
* Writes an SQL <code>NCLOB</code> value to the stream.
*
* @param x a <code>NClob</code> object representing data of an SQL
* <code>NCLOB</code> value
*
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.6
*/
void writeNClob(NClob x) throws SQLException;
/**
* Writes an SQL <code>ROWID</code> value to the stream.
*
* @param x a <code>RowId</code> object representing data of an SQL
* <code>ROWID</code> value
*
* @exception SQLException if a database access error occurs
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.6
*/
void writeRowId(RowId x) throws SQLException;
/**
* Writes an SQL <code>XML</code> value to the stream.
*
* @param x a <code>SQLXML</code> object representing data of an SQL
* <code>XML</code> value
*
* @throws SQLException if a database access error occurs,
* the <code>java.xml.transform.Result</code>,
* <code>Writer</code> or <code>OutputStream</code> has not been closed for the <code>SQLXML</code> object or
* if there is an error processing the XML value. The <code>getCause</code> method
* of the exception may provide a more detailed exception, for example, if the
* stream does not contain valid XML.
* @exception SQLFeatureNotSupportedException if the JDBC driver does not support
* this method
* @since 1.6
*/
void writeSQLXML(SQLXML x) throws SQLException;
//--------------------------JDBC 4.2 -----------------------------
/**
* Writes to the stream the data contained in the given object. The
* object will be converted to the specified targetSqlType
* before being sent to the stream.
*<p>
* When the {@code object} is {@code null}, this
* method writes an SQL {@code NULL} to the stream.
* <p>
* If the object has a custom mapping (is of a class implementing the
* interface {@code SQLData}),
* the JDBC driver should call the method {@code SQLData.writeSQL} to
* write it to the SQL data stream.
* If, on the other hand, the object is of a class implementing
* {@code Ref}, {@code Blob}, {@code Clob}, {@code NClob},
* {@code Struct}, {@code java.net.URL},
* or {@code Array}, the driver should pass it to the database as a
* value of the corresponding SQL type.
*<P>
* The default implementation will throw {@code SQLFeatureNotSupportedException}
*
* @param x the object containing the input parameter value
* @param targetSqlType the SQL type to be sent to the database.
* @exception SQLException if a database access error occurs or
* if the Java Object specified by x is an InputStream
* or Reader object and the value of the scale parameter is less
* than zero
* @exception SQLFeatureNotSupportedException if
* the JDBC driver does not support this data type
* @see JDBCType
* @see SQLType
* @since 1.8
*/
default void writeObject(Object x, SQLType targetSqlType) throws SQLException {
throw new SQLFeatureNotSupportedException();
}
}