package org.postgresql.jdbc2;

// IMPORTANT NOTE: This file implements the JDBC 2 version of the driver.
// If you make any modifications to this file, you must make sure that the
// changes are also made (if relevent) to the related JDBC 1 class in the
// org.postgresql.jdbc1 package.

import java.sql.*;
import java.math.*;

/*
 * CallableStatement is used to execute SQL stored procedures.
 *
 * <p>JDBC provides a stored procedure SQL escape that allows stored
 * procedures to be called in a standard way for all RDBMS's. This escape
 * syntax has one form that includes a result parameter and one that does
 * not. If used, the result parameter must be registered as an OUT
 * parameter. The other parameters may be used for input, output or both.
 * Parameters are refered to sequentially, by number. The first parameter
 * is 1.
 *
 * {?= call <procedure-name>[<arg1>,<arg2>, ...]}
 * {call <procedure-name>[<arg1>,<arg2>, ...]}
 *
 *
 * <p>IN parameter values are set using the set methods inherited from
 * PreparedStatement. The type of all OUT parameters must be registered
 * prior to executing the stored procedure; their values are retrieved
 * after execution via the get methods provided here.
 *
 * <p>A Callable statement may return a ResultSet or multiple ResultSets.
 * Multiple ResultSets are handled using operations inherited from
 * Statement.
 *
 * <p>For maximum portability, a call's ResultSets and update counts should
 * be processed prior to getting the values of output parameters.
 *
 * @see Connection#prepareCall
 * @see ResultSet
 */

public class CallableStatement extends org.postgresql.jdbc2.PreparedStatement implements java.sql.CallableStatement
{
	/*
	 * @exception SQLException on failure
	 */
	public CallableStatement(Connection c, String q) throws SQLException
	{
		super(c, q);
	}

	/*
	 * Before executing a stored procedure call you must explicitly
	 * call registerOutParameter to register the java.sql.Type of each
	 * out parameter.
	 *
	 * <p>Note: When reading the value of an out parameter, you must use
	 * the getXXX method whose Java type XXX corresponds to the
	 * parameter's registered SQL type.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @param sqlType SQL type code defined by java.sql.Types; for
	 * parameters of type Numeric or Decimal use the version of
	 * registerOutParameter that accepts a scale value
	 * @exception SQLException if a database-access error occurs.
	 */
	public void registerOutParameter(int parameterIndex, int sqlType) throws SQLException
		{}

	/*
	 * You must also specify the scale for numeric/decimal types:
	 *
	 * <p>Note: When reading the value of an out parameter, you must use
	 * the getXXX method whose Java type XXX corresponds to the
	 * parameter's registered SQL type.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @param sqlType use either java.sql.Type.NUMERIC or java.sql.Type.DECIMAL
	 * @param scale a value greater than or equal to zero representing the
	 * desired number of digits to the right of the decimal point
	 * @exception SQLException if a database-access error occurs.
	 */
	public void registerOutParameter(int parameterIndex, int sqlType,
									 int scale) throws SQLException
		{}

	// Old api?
	//public boolean isNull(int parameterIndex) throws SQLException {
	//return true;
	//}

	/*
	 * An OUT parameter may have the value of SQL NULL; wasNull
	 * reports whether the last value read has this special value.
	 *
	 * <p>Note: You must first call getXXX on a parameter to read its
	 * value and then call wasNull() to see if the value was SQL NULL.
	 * @return true if the last parameter read was SQL NULL
	 * @exception SQLException if a database-access error occurs.
	 */
	public boolean wasNull() throws SQLException
	{
		// check to see if the last access threw an exception
		return false; // fake it for now
	}

	// Old api?
	//public String getChar(int parameterIndex) throws SQLException {
	//return null;
	//}

	/*
	 * Get the value of a CHAR, VARCHAR, or LONGVARCHAR parameter as a
	 * Java String.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is null
	 * @exception SQLException if a database-access error occurs.
	 */
	public String getString(int parameterIndex) throws SQLException
	{
		return null;
	}
	//public String getVarChar(int parameterIndex) throws SQLException {
	//	 return null;
	//}

	//public String getLongVarChar(int parameterIndex) throws SQLException {
	//return null;
	//}

	/*
	 * Get the value of a BIT parameter as a Java boolean.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is false
	 * @exception SQLException if a database-access error occurs.
	 */
	public boolean getBoolean(int parameterIndex) throws SQLException
	{
		return false;
	}

	/*
	 * Get the value of a TINYINT parameter as a Java byte.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is 0
	 * @exception SQLException if a database-access error occurs.
	 */
	public byte getByte(int parameterIndex) throws SQLException
	{
		return 0;
	}

	/*
	 * Get the value of a SMALLINT parameter as a Java short.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is 0
	 * @exception SQLException if a database-access error occurs.
	 */
	public short getShort(int parameterIndex) throws SQLException
	{
		return 0;
	}

	/*
	 * Get the value of an INTEGER parameter as a Java int.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is 0
	 * @exception SQLException if a database-access error occurs.
	 */
	public int getInt(int parameterIndex) throws SQLException
	{
		return 0;
	}

	/*
	 * Get the value of a BIGINT parameter as a Java long.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is 0
	 * @exception SQLException if a database-access error occurs.
	 */
	public long getLong(int parameterIndex) throws SQLException
	{
		return 0;
	}

	/*
	 * Get the value of a FLOAT parameter as a Java float.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is 0
	 * @exception SQLException if a database-access error occurs.
	 */
	public float getFloat(int parameterIndex) throws SQLException
	{
		return (float) 0.0;
	}

	/*
	 * Get the value of a DOUBLE parameter as a Java double.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is 0
	 * @exception SQLException if a database-access error occurs.
	 */
	public double getDouble(int parameterIndex) throws SQLException
	{
		return 0.0;
	}

	/*
	 * Get the value of a NUMERIC parameter as a java.math.BigDecimal
	 * object.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @param scale a value greater than or equal to zero representing the
	 * desired number of digits to the right of the decimal point
	 * @return the parameter value; if the value is SQL NULL, the result is null
	 * @exception SQLException if a database-access error occurs.
	 * @deprecated in Java2.0
	 */
	public BigDecimal getBigDecimal(int parameterIndex, int scale)
	throws SQLException
	{
		return null;
	}

	/*
	 * Get the value of a SQL BINARY or VARBINARY parameter as a Java
	 * byte[]
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is null
	 * @exception SQLException if a database-access error occurs.
	 */
	public byte[] getBytes(int parameterIndex) throws SQLException
	{
		return null;
	}

	// New API (JPM) (getLongVarBinary)
	//public byte[] getBinaryStream(int parameterIndex) throws SQLException {
	//return null;
	//}

	/*
	 * Get the value of a SQL DATE parameter as a java.sql.Date object
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is null
	 * @exception SQLException if a database-access error occurs.
	 */
	public java.sql.Date getDate(int parameterIndex) throws SQLException
	{
		return null;
	}

	/*
	 * Get the value of a SQL TIME parameter as a java.sql.Time object.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is null
	 * @exception SQLException if a database-access error occurs.
	 */
	public java.sql.Time getTime(int parameterIndex) throws SQLException
	{
		return null;
	}

	/*
	 * Get the value of a SQL TIMESTAMP parameter as a java.sql.Timestamp object.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return the parameter value; if the value is SQL NULL, the result is null
	 * @exception SQLException if a database-access error occurs.
	 */
	public java.sql.Timestamp getTimestamp(int parameterIndex)
	throws SQLException
	{
		return null;
	}

	//----------------------------------------------------------------------
	// Advanced features:

	// You can obtain a ParameterMetaData object to get information
	// about the parameters to this CallableStatement.
	//public DatabaseMetaData getMetaData() {
	//return null;
	//}

	// getObject returns a Java object for the parameter.
	// See the JDBC spec's "Dynamic Programming" chapter for details.
	/*
	 * Get the value of a parameter as a Java object.
	 *
	 * <p>This method returns a Java object whose type coresponds to the
	 * SQL type that was registered for this parameter using
	 * registerOutParameter.
	 *
	 * <P>Note that this method may be used to read datatabase-specific,
	 * abstract data types. This is done by specifying a targetSqlType
	 * of java.sql.types.OTHER, which allows the driver to return a
	 * database-specific Java type.
	 *
	 * <p>See the JDBC spec's "Dynamic Programming" chapter for details.
	 *
	 * @param parameterIndex the first parameter is 1, the second is 2,...
	 * @return A java.lang.Object holding the OUT parameter value.
	 * @exception SQLException if a database-access error occurs.
	 */
	public Object getObject(int parameterIndex)
	throws SQLException
	{
		return null;
	}

	// ** JDBC 2 Extensions **

	public java.sql.Array getArray(int i) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

	public java.math.BigDecimal getBigDecimal(int i) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

	public Blob getBlob(int i) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

	public Clob getClob(int i) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

	public Object getObject(int i, java.util.Map map) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

	public Ref getRef(int i) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

	public java.sql.Date getDate(int i, java.util.Calendar cal) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

	public Time getTime(int i, java.util.Calendar cal) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

	public Timestamp getTimestamp(int i, java.util.Calendar cal) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

	public void registerOutParameter(int parameterIndex, int sqlType, String typeName) throws SQLException
	{
		throw org.postgresql.Driver.notImplemented();
	}

}