preparedsentence.java

是一个专门设计用于触摸屏的POS(point of sales)应用软件

//    Tina POS is a point of sales application designed for touch screens.
//    Copyright (C) 2005 Adrian Romero Corchado.
//    http://sourceforge.net/projects/tinapos
//
//    This program is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    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 General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

package net.adrianromero.data.loader;

import java.sql.*;
import java.util.*;
import net.adrianromero.basic.BasicException;

/**
 *
 * @author  adrianromero
 */
public class PreparedSentence extends JDBCSentence {
    
    private String m_sentence;
    protected SerializerWrite m_SerWrite = null;
    protected SerializerRead m_SerRead = null;
    
    // Estado
    private PreparedStatement m_Stmt;
    
    public PreparedSentence(Session s, String sentence, SerializerWrite serwrite, SerializerRead serread) {         
        super(s);
        m_sentence = sentence;        
        m_SerWrite = serwrite;
        m_SerRead = serread;
        m_Stmt = null;
    }
    public PreparedSentence(Session s, String sentence, SerializerWrite serwrite) {         
        this(s, sentence, serwrite, null);
    }
    public PreparedSentence(Session s, String sentence) {         
        this(s, sentence, null, null);
    }
    
    private static final class PreparedSentencePars implements DataWrite {

        private PreparedStatement m_ps;

        /** Creates a new instance of SQLParameter */
        PreparedSentencePars(PreparedStatement ps) {
            m_ps = ps;
        }

        public void setInt(int paramIndex, Integer iValue) throws BasicException {
            try {
                m_ps.setObject(paramIndex, iValue, Types.INTEGER);
            } catch (SQLException eSQL) {
                throw new BasicException(eSQL);
            }
        }
        public void setString(int paramIndex, String sValue) throws BasicException {
            try {
                m_ps.setString(paramIndex, sValue);
            } catch (SQLException eSQL) {
                throw new BasicException(eSQL);
            }
        }
        public void setDouble(int paramIndex, Double dValue) throws BasicException {
            try {
                m_ps.setObject(paramIndex, dValue, Types.DOUBLE);
            } catch (SQLException eSQL) {
                throw new BasicException(eSQL);
            }
        }   
        public void setBoolean(int paramIndex, Boolean bValue) throws BasicException {
            try {
                if (bValue == null) {
                    m_ps.setObject(paramIndex, null);
                } else {
                    m_ps.setBoolean(paramIndex, bValue.booleanValue());
                }
                // m_ps.setObject(paramIndex, bValue, Types.BOOLEAN);
            } catch (SQLException eSQL) {
                throw new BasicException(eSQL);
            }
        }   
        public void setTimestamp(int paramIndex, java.util.Date dValue) throws BasicException {        
            try {
                m_ps.setObject(paramIndex, dValue == null ? null : new Timestamp(dValue.getTime()), Types.TIMESTAMP);
            } catch (SQLException eSQL) {
                throw new BasicException(eSQL);
            }
        }       
//        public void setBinaryStream(int paramIndex, java.io.InputStream in, int length) throws DataException {
//            try {
//                m_ps.setBinaryStream(paramIndex, in, length);
//            } catch (SQLException eSQL) {
//                throw new DataException(eSQL);
//            }
//        }
        public void setBytes(int paramIndex, byte[] value) throws BasicException {
            try {
                m_ps.setBytes(paramIndex, value);
            } catch (SQLException eSQL) {
                throw new BasicException(eSQL);
            }
        }
        public void setObject(int paramIndex, Object value) throws BasicException {
            try {
                m_ps.setObject(paramIndex, value);
            } catch (SQLException eSQL) {
                throw new BasicException(eSQL);
            }
        }
    } 
    
    public DataResultSet openExec(Object params) throws BasicException {
        // true -> un resultset
        // false -> un updatecount (si -1 entonces se acabo)
        
        closeExec();
        
        try {
            m_Stmt = m_s.getConnection().prepareStatement(m_sentence);
 
            if (params != null) {
                // si m_SerWrite fuera null deberiamos cascar.
                m_SerWrite.writeValues(new PreparedSentencePars(m_Stmt), params);
            }

            if (m_Stmt.execute()) {            
                return new JDBCDataResultSet(m_Stmt.getResultSet(), m_SerRead);
            } else { 
                int iUC = m_Stmt.getUpdateCount();
                if (iUC < 0) {
                    return null;
                } else {
                    return new SentenceUpdateResultSet(iUC);
                }
            }
        } catch (SQLException eSQL) {
            throw new BasicException(eSQL);
        }
    }
    
    public final DataResultSet moreResults() throws BasicException {
        // true -> un resultset
        // false -> un updatecount (si -1 entonces se acabo)
        
        try {
            if (m_Stmt.getMoreResults()){
                // tenemos resultset
                return new JDBCDataResultSet(m_Stmt.getResultSet(), m_SerRead);
            } else {
                // tenemos updatecount o si devuelve -1 ya no hay mas
                int iUC = m_Stmt.getUpdateCount();
                if (iUC < 0) {
                    return null;
                } else {
                    return new SentenceUpdateResultSet(iUC);
                }
            }
        } catch (SQLException eSQL) {
            throw new BasicException(eSQL);
        }
    }

    public final void closeExec() throws BasicException {
        
        if (m_Stmt != null) {
            try {
                m_Stmt.close();
           } catch (SQLException eSQL) {
                throw new BasicException(eSQL);
            } finally {
                m_Stmt = null;
            }
        }
     }      
}