http://xmlgraphics.apache.org/fop/: Apache FOP (Formatting Objects Processor) is the world's first print formatter driven by XSL formatting objects (XSL-FO) and the world's first output independent formatter. It is a Java application that reads a formatting object (FO) tree and renders the resulting pages to a specified output. Output formats currently supported include PDF, PCL, PS, AFP, TIFF, PNG, SVG, XML (area tree representation), Print, AWT and TXT. The primary output target is PDF. (Apache Software Foundation) 
/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/* $Id: XMLLangShorthandParser.java 985537 2010-08-14 17:17:00Z jeremias $ */

package org.apache.fop.fo.properties;

import org.apache.fop.fo.Constants;
import org.apache.fop.fo.PropertyList;
import org.apache.fop.fo.expr.PropertyException;


A parser for the xml:lang property.

/**
 * A parser for the xml:lang property.
 */
public class XMLLangShorthandParser extends GenericShorthandParser {

    private static final char HYPHEN_MINUS = '-';

    
{@inheritDoc} 
/** {@inheritDoc} */
    public Property getValueForProperty(int propId,
                                        Property property,
                                        PropertyMaker maker,
                                        PropertyList propertyList)
                    throws PropertyException {

        String shorthandValue = property.getString();
        int hyphenIndex = shorthandValue.indexOf(HYPHEN_MINUS);
        if (propId == Constants.PR_LANGUAGE) {
            if (hyphenIndex == -1) {
                /* only language specified; use the whole property */
                return property;
            } else {
                /* use only the primary tag */
                return StringProperty.getInstance(
                        shorthandValue.substring(0, hyphenIndex));
            }
        } else if (propId == Constants.PR_COUNTRY) {
            if (hyphenIndex != -1) {
                int nextHyphenIndex = shorthandValue.indexOf(HYPHEN_MINUS, hyphenIndex + 1);
                if (nextHyphenIndex != -1) {
                    return StringProperty.getInstance(
                            shorthandValue.substring(hyphenIndex + 1, nextHyphenIndex));
                } else {
                    return StringProperty.getInstance(
                            shorthandValue.substring(hyphenIndex + 1));
                }
            }
        }
        return null;
    }
}