/*
* eXist Open Source Native XML Database
* Copyright (C) 2001-09 Wolfgang M. Meier
* wolfgang@exist-db.org
* http://exist.sourceforge.net
*
* This program 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
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id$
*/
package org.exist.xquery.functions.system;
import java.io.IOException;
import java.util.Properties;
import org.apache.log4j.Logger;
import org.exist.dom.QName;
import org.exist.xquery.BasicFunction;
import org.exist.xquery.Cardinality;
import org.exist.xquery.FunctionSignature;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.functions.util.UtilModule;
import org.exist.xquery.value.FunctionReturnSequenceType;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.StringValue;
import org.exist.xquery.value.Type;
/**
* Return the eXist version
*
* @author wolf
*/
public class GetVersion extends BasicFunction
{
protected final static Logger logger = Logger.getLogger(GetVersion.class);
public final static FunctionSignature signature =
new FunctionSignature(
new QName("get-version", SystemModule.NAMESPACE_URI, SystemModule.PREFIX),
"Returns the version of eXist running this query.",
FunctionSignature.NO_ARGS,
new FunctionReturnSequenceType(Type.STRING, Cardinality.EXACTLY_ONE, "the version string"));
public final static FunctionSignature deprecated =
new FunctionSignature(
new QName("eXist-version", UtilModule.NAMESPACE_URI, UtilModule.PREFIX),
"Returns the version of eXist running this query.",
FunctionSignature.NO_ARGS,
new FunctionReturnSequenceType(Type.STRING, Cardinality.EXACTLY_ONE, "the version string"),
"Moved to system module and renamed to system:get-version.");
public GetVersion(XQueryContext context)
{
super(context, signature);
}
/* (non-Javadoc)
* @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[], org.exist.xquery.value.Sequence)
*/
public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException
{
logger.info("Entering the " + SystemModule.PREFIX + ":get-version XQuery function");
Properties sysProperties = new Properties();
try
{
sysProperties.load(GetVersion.class.getClassLoader().getResourceAsStream("org/exist/system.properties"));
}
catch (IOException e)
{
logger.debug("Unable to load system.properties from class loader");
}
return new StringValue(sysProperties.getProperty("product-version", "unknown version"));
}
}