Subversion Repositories splitter

/*
 * Copyright (c) 2009.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as
 * published by the Free Software Foundation.
 *
 * 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
 * General Public License for more details.
 */

package uk.me.parabola.splitter;

import java.io.IOException;
import java.io.Reader;

import org.xmlpull.v1.XmlPullParser;
import org.xmlpull.v1.XmlPullParserException;
import org.xmlpull.v1.XmlPullParserFactory;

/**
 * Base functionality for an XPP based XML parser
 */
public abstract class AbstractXppParser {
        private final XmlPullParser parser;

        public AbstractXppParser() throws XmlPullParserException {
                XmlPullParserFactory factory = XmlPullParserFactory.newInstance(System.getProperty(XmlPullParserFactory.PROPERTY_NAME), null);
                parser = factory.newPullParser();
        }

        protected void setReader(Reader reader) throws XmlPullParserException {
                parser.setInput(reader);
        }

        protected String getAttr(String name) {
                return parser.getAttributeValue(null, name);
        }

        protected int getIntAttr(String name) {
                return Integer.parseInt(parser.getAttributeValue(null, name));
        }

        protected String getTextContent() {
                return parser.getText();
        }

        protected void parse() throws IOException, XmlPullParserException {
                boolean done = false;
                int eventType = parser.getEventType();
                do {
                        if (eventType == XmlPullParser.START_TAG) {
                                done = startElement(parser.getName());
                        } else if (eventType == XmlPullParser.END_TAG) {
                                endElement(parser.getName());
                        } else if (eventType == XmlPullParser.TEXT) {
                                text();
                        }
                }
                while (!done && (eventType = parser.next()) != XmlPullParser.END_DOCUMENT);
        }

        protected XmlPullParserException createException(String message) {
                return new XmlPullParserException(message, parser, null);
        }
        /**
         * Called when the start of an element is encountered.
         * @param name the name of the element.
         * @return {@code true} to abort the parsing because there's
         * no further processing required, {@code false} otherwise.
         * @throws XmlPullParserException
         */
        abstract protected boolean startElement(String name) throws XmlPullParserException;

        abstract protected void endElement(String name) throws XmlPullParserException;

        protected void text() throws XmlPullParserException {
        }
}