43 lines
1.7 KiB
Java
Executable File
43 lines
1.7 KiB
Java
Executable File
/*
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* Copyright (C) 2001-2004 Red Hat Inc. All Rights Reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 2.1 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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package com.arsdigita.persistence;
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/**
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* This is the interface for random SQL utilities that are needed
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* to allow the system to work with different databases. For instance
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* the Oracle instance of this replaces "= null" with "is null"
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*
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* @author <a href="mailto:randyg@alum.mit.edu">randyg@alum.mit.edu</a>
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* @version $Id: SQLUtilities.java 287 2005-02-22 00:29:02Z sskracic $
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*/
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public interface SQLUtilities {
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/**
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* This method takes a comparator (e.g. =, <=, >=, !=, <>)
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* as well as a variable name and then creates the appropriate
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* string given that the value of the variable is null.
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* In oracle, this will return something like "is not null"
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* or "is null" Other databases will have something like
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* <code>comparator + " :" + variableName<code>
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*/
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String createNullString(String comparator, String variableName);
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}
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