/*
* eXist Open Source Native XML Database
* Copyright (C) 2004-09 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.util;
import java.text.Collator;
import java.util.Locale;
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.value.FunctionReturnSequenceType;
import org.exist.xquery.value.Sequence;
import org.exist.xquery.value.StringValue;
import org.exist.xquery.value.Type;
import org.exist.xquery.value.ValueSequence;
/**
* Library function to return all collation locales currently known to the system.
*
* @author wolf
*/
public class Collations extends BasicFunction {
protected static final Logger logger = Logger.getLogger(Collations.class);
public final static FunctionSignature signature =
new FunctionSignature(
new QName("collations", UtilModule.NAMESPACE_URI, UtilModule.PREFIX),
"Returns a sequence of strings containing all collation locales that might be " +
"specified in the '?lang=' parameter of a collation URI.",
FunctionSignature.NO_ARGS,
new FunctionReturnSequenceType(Type.STRING, Cardinality.ZERO_OR_MORE, "the sequence of strings containing all collation locales that might be " +
"specified in the '?lang=' parameter of a collation URI."));
/**
* @param context
*/
public Collations(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 {
final ValueSequence result = new ValueSequence();
final Locale[] locales = Collator.getAvailableLocales();
String locale;
for(int i = 0; i < locales.length; i++) {
locale = locales[i].getLanguage();
if(locales[i].getCountry().length() > 0)
{locale += '-' + locales[i].getCountry();}
result.add(new StringValue(locale));
}
return result;
}
}