callablestatementproxy.java

jtds的源码 是你学习java的好东西

// jTDS JDBC Driver for Microsoft SQL Server and Sybase
// Copyright (C) 2004 The jTDS Project
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library 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 library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
package net.sourceforge.jtds.jdbcx.proxy;

import java.math.BigDecimal;
import java.sql.*;
import java.util.Calendar;

import net.sourceforge.jtds.jdbc.*;

/**
 * This class would be better implemented as a java.lang.reflect.Proxy.  However, this
 * feature was not added until 1.3 and reflection performance was not improved until 1.4.
 * Since the driver still needs to be compatible with 1.2 and 1.3 this class is used
 * to delegate the calls to a callable statement with minimal overhead.
 *
 * @version $Id: CallableStatementProxy.java,v 1.3 2004/08/24 17:45:08 bheineman Exp $
 */
public class CallableStatementProxy
extends PreparedStatementProxy
implements CallableStatement {
    private JtdsCallableStatement _callableStatement;
    
    CallableStatementProxy(ConnectionProxy connection, JtdsCallableStatement callableStatement) {
        super(connection, callableStatement);
        
        _callableStatement = callableStatement;
    }
    
    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public void registerOutParameter(int parameterIndex, int sqlType) throws SQLException {
        validateConnection();

        try {
            _callableStatement.registerOutParameter(parameterIndex, sqlType);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public void registerOutParameter(int parameterIndex, int sqlType, int scale) throws SQLException {
        validateConnection();

        try {
            _callableStatement.registerOutParameter(parameterIndex, sqlType, scale);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public boolean wasNull() throws SQLException {
        validateConnection();

        try {
            return _callableStatement.wasNull();
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return false;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public String getString(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getString(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return null;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public boolean getBoolean(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getBoolean(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return false;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public byte getByte(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getByte(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return Byte.MIN_VALUE;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public short getShort(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getShort(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return Short.MIN_VALUE;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public int getInt(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getInt(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return Integer.MIN_VALUE;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public long getLong(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getLong(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return Long.MIN_VALUE;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public float getFloat(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getFloat(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return Float.MIN_VALUE;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public double getDouble(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getDouble(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return Double.MIN_VALUE;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public BigDecimal getBigDecimal(int parameterIndex, int scale) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getBigDecimal(parameterIndex, scale);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return null;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public byte[] getBytes(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getBytes(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return null;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public Date getDate(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getDate(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return null;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public Time getTime(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getTime(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return null;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public Timestamp getTimestamp(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getTimestamp(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return null;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public Object getObject(int parameterIndex) throws SQLException {
        validateConnection();

        try {
            return _callableStatement.getObject(parameterIndex);
        } catch (SQLException sqlException) {
            processSQLException(sqlException);
        }
        
        return null;
    }

    /**
     * Delgates calls to the callable statement; SQLExceptions thrown from the
     * callable statement will cause an event to be fired on the connection
     * pool listeners.
     *
     * @throws SQLException if an error occurs
     */
    public BigDecimal getBigDecimal(int parameterIndex) throws SQLException {