net.sf.log4jdbc.sql.rdbmsspecifics.RdbmsSpecifics Maven / Gradle / Ivy
/**
* Copyright 2007-2012 Arthur Blake
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sf.log4jdbc.sql.rdbmsspecifics;
import java.util.Date;
import java.text.SimpleDateFormat;
import net.sf.log4jdbc.Properties;
/**
* Encapsulate sql formatting details about a particular relational database management system so that
* accurate, useable SQL can be composed for that RDMBS.
*
* @author Arthur Blake
*/
public class RdbmsSpecifics
{
/**
* Default constructor.
*/
public RdbmsSpecifics()
{
}
protected static final String dateFormat = "MM/dd/yyyy HH:mm:ss.SSS";
/**
* Format an Object that is being bound to a PreparedStatement parameter, for display. The goal is to reformat the
* object in a format that can be re-run against the native SQL client of the particular Rdbms being used. This
* class should be extended to provide formatting instances that format objects correctly for different RDBMS
* types.
*
* @param object jdbc object to be formatted.
* @return formatted dump of the object.
*/
public String formatParameterObject(Object object)
{
if (object == null)
{
return "NULL";
}
if (object instanceof String)
{
return "'" + escapeString((String)object) + "'";
}
else if (object instanceof Date)
{
return "'" + new SimpleDateFormat(dateFormat).format(object) + "'";
}
else if (object instanceof Boolean)
{
return Properties.isDumpBooleanAsTrueFalse()?
((Boolean)object).booleanValue()?"true":"false"
:((Boolean)object).booleanValue()?"1":"0";
}
else
{
return object.toString();
}
}
/**
* Make sure string is escaped properly so that it will run in a SQL query analyzer tool.
* At this time all we do is double any single tick marks.
* Do not call this with a null string or else an exception will occur.
*
* @return the input String, escaped.
*/
String escapeString(String in)
{
StringBuilder out = new StringBuilder();
for (int i=0, j=in.length(); i < j; i++)
{
char c = in.charAt(i);
if (c == '\'')
{
out.append(c);
}
out.append(c);
}
return out.toString();
}
}