Directive.java

/**
 *   GRANITE DATA SERVICES
 *   Copyright (C) 2006-2015 GRANITE DATA SERVICES S.A.S.
 *
 *   This file is part of the Granite Data Services Platform.
 *
 *   Granite Data Services 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 2.1 of the License, or (at your option) any later version.
 *
 *   Granite Data Services 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 library; if not, write to the Free Software
 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
 *   USA, or see <http://www.gnu.org/licenses/>.
 */
package org.granite.generator.gsp.token;

import org.granite.generator.gsp.ParseException;

import java.io.StringReader;
import java.io.IOException;

import java.util.Map;
import java.util.HashMap;

import org.xml.sax.Attributes;
import org.xml.sax.SAXException;
import org.xml.sax.InputSource;
import org.xml.sax.helpers.DefaultHandler;

import javax.xml.parsers.SAXParserFactory;
import javax.xml.parsers.ParserConfigurationException;

/**
 * @author Franck WOLFF
 */
public class Directive extends Token {

    String name = null;
    final Map<String, String> attributes = new HashMap<String, String>();

    public Directive(int index, String content) throws ParseException {
        super(index, content);
        try {
            parse(content);
        } catch (Exception e) {
            throw new ParseException(e);
        }
    }

    public String getName() {
        return name;
    }

    public Map<String, String> getAttributes() {
        return attributes;
    }

    private void parse(String content)
        throws SAXException, ParserConfigurationException, IOException {
        InputSource is = new InputSource(new StringReader('<' + content + "/>"));
        SAXParserFactory.newInstance().newSAXParser().parse(is, new Handler());
    }

    @Override
    public String toString() {
        return this.getClass().getName() + '[' + name + ", " + attributes + ']';
    }

    class Handler extends DefaultHandler {
        @Override
        public void startElement(String namespaceURI,
                                 String localName,
                                 String qName,
                                 Attributes atts)
            throws SAXException {
            if (name != null)
                throw new SAXException("illegal nested element: " + qName);
            name = qName;
            for (int i = 0; i < atts.getLength(); i++)
                attributes.put(atts.getQName(i), atts.getValue(i));
        }
    }
}