/*
* eXist Open Source Native XML Database
* Copyright (C) 2009-2014 The eXist-db Project
* http://exist-db.org
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
package org.exist.xquery.functions.system;
import org.exist.SystemProperties;
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.value.FunctionReturnSequenceType;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.StringValue;
import org.exist.xquery.value.Type;
/**
* Return the Git commit ID.
*
* @author Dannes Wessels
* @author Leif-Jöran Olsson
*/
public class GetRevision extends BasicFunction {
public final static FunctionSignature signature = new FunctionSignature(
new QName("get-revision", SystemModule.NAMESPACE_URI, SystemModule.PREFIX),
"Returns the Git commit ID of the eXist instance running this query.",
FunctionSignature.NO_ARGS,
new FunctionReturnSequenceType(Type.STRING, Cardinality.EXACTLY_ONE, "the Git commit ID.")
);
public GetRevision(XQueryContext context) {
super(context, signature);
}
/* (non-Javadoc)
* @see org.exist.xquery.BasicFunction#eval(org.exist.xquery.value.Sequence[], org.exist.xquery.value.Sequence)
*/
@Override
public Sequence eval(Sequence[] args, Sequence contextSequence) throws XPathException {
return new StringValue(SystemProperties.getInstance().getSystemProperty("git-commit", "unknown Git commit ID"));
}
}