/*
 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package build.tools.cldrconverter;

import java.io.File;
import java.io.IOException;
import org.xml.sax.Attributes;
import org.xml.sax.InputSource;
import org.xml.sax.SAXException;

/**
 * Handles parsing of files in Locale Data Markup Language for likelySubtags.xml
 * and produces a map that uses the keys and values of JRE locale data.
 */

class LikelySubtagsParseHandler extends AbstractLDMLHandler<String> {

    LikelySubtagsParseHandler() {
    }

    @Override
    public InputSource resolveEntity(String publicID, String systemID) throws IOException, SAXException {
        // avoid HTTP traffic to unicode.org
        if (systemID.startsWith(CLDRConverter.SPPL_LDML_DTD_SYSTEM_ID)) {
            return new InputSource((new File(CLDRConverter.LOCAL_SPPL_LDML_DTD)).toURI().toString());
        }
        return null;
    }

    @Override
    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
        switch (qName) {
        case "likelySubtag":
            // eg, <likelySubtag from="aa" to="aa_Latn_ET"/>
            String from = attributes.getValue("from");
            if (!from.startsWith("und")) {
                // Ignore the "undefined" language for now
                put(from, attributes.getValue("to"));
            }
            pushIgnoredContainer(qName);
            break;
        default:
            // treat anything else as a container
            pushContainer(qName, attributes);
            break;
        }
    }
}
