/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.ejb.plugins.cmp.jdbc;
import org.jboss.logging.Logger;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.io.StringReader;
import java.io.ByteArrayInputStream;
import java.math.BigDecimal;
/**
* Implementations of this interface are used to set java.sql.PreparedStatement parameters.
*
* @author <a href="mailto:alex@jboss.org">Alexey Loubyansky</a>
* @version <tt>$Revision: 81030 $</tt>
*/
public interface JDBCParameterSetter
{
/**
* Sets a parameter of a specific JDBC type.
* @param ps the java.sql.PreparedStatement to set parameter on
* @param index the index of the parameter
* @param jdbcType the JDBC type of the parameter as defined by java.sql.Types
* @param value parameter value
* @param log the logger
* @throws SQLException
*/
void set(PreparedStatement ps, int index, int jdbcType, Object value, Logger log) throws SQLException;
abstract class JDBCAbstractParameterSetter implements JDBCParameterSetter
{
public void set(PreparedStatement ps, int index, int jdbcType, Object value, Logger log)
throws SQLException
{
if(log.isTraceEnabled())
{
log.trace("param: " +
"i=" + index + ", " +
"type=" + JDBCUtil.getJDBCTypeName(jdbcType) + ", " +
"value=" + ((value == null) ? "NULL" : value));
}
if(value == null)
{
ps.setNull(index, jdbcType);
}
else
{
value = JDBCUtil.coerceToSQLType(jdbcType, value);
setNotNull(ps, index, jdbcType, value, log);
}
}
protected abstract void setNotNull(PreparedStatement ps, int index, int jdbcType, Object value, Logger log)
throws SQLException;
}
/**
* Types.CLOB, Types.LONGVARCHAR.
*/
JDBCParameterSetter CLOB = new JDBCAbstractParameterSetter()
{
protected void setNotNull(PreparedStatement ps, int index, int jdbcType, Object value, Logger log)
throws SQLException
{
String string = value.toString();
ps.setCharacterStream(index, new StringReader(string), string.length());
}
};
/**
* Types.BINARY, Types.VARBINARY.
*/
JDBCParameterSetter BINARY = new JDBCAbstractParameterSetter()
{
protected void setNotNull(PreparedStatement ps, int index, int jdbcType, Object value, Logger log)
throws SQLException
{
byte[] bytes = JDBCUtil.convertObjectToByteArray(value);
ps.setBytes(index, bytes);
}
};
/**
* Types.BLOB, Types.LONGVARBINARY.
*/
JDBCParameterSetter BLOB = new JDBCAbstractParameterSetter()
{
protected void setNotNull(PreparedStatement ps, int index, int jdbcType, Object value, Logger log)
throws SQLException
{
byte[] bytes = JDBCUtil.convertObjectToByteArray(value);
ps.setBinaryStream(index, new ByteArrayInputStream(bytes), bytes.length);
}
};
/**
* Types.DECIMAL, Types.NUMERIC
*/
JDBCParameterSetter NUMERIC = new JDBCAbstractParameterSetter()
{
protected void setNotNull(PreparedStatement ps, int index, int jdbcType, Object value, Logger log)
throws SQLException
{
if(value instanceof BigDecimal)
{
ps.setBigDecimal(index, (BigDecimal)value);
}
else
{
ps.setObject(index, value, jdbcType, 0);
}
}
};
/**
* Types.JAVA_OBJECT, Types.OTHER, Types.STRUCT
*/
JDBCParameterSetter OBJECT = new JDBCAbstractParameterSetter()
{
protected void setNotNull(PreparedStatement ps, int index, int jdbcType, Object value, Logger log)
throws SQLException
{
ps.setObject(index, value, jdbcType);
}
};
}