de.topobyte.osm4j.xml.dynsax.DateParser.java Source code

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Here is the source code for de.topobyte.osm4j.xml.dynsax.DateParser.java

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// Copyright 2015 Sebastian Kuerten
//
// This file is part of osm4j.
//
// osm4j 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 3 of the License, or
// (at your option) any later version.
//
// osm4j 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 osm4j. If not, see <http://www.gnu.org/licenses/>.

package de.topobyte.osm4j.xml.dynsax;

import org.joda.time.DateTime;
import org.joda.time.format.DateTimeFormat;
import org.joda.time.format.DateTimeFormatter;

class DateParser {

    private static final String[] PATTERNS = { "yyyy-MM-dd'T'HH:mm:ss'Z'", "yyyy-MM-dd'T'HH:mm:ssZ" };

    private static final DateTimeFormatter[] PARSERS;

    static {
        PARSERS = new DateTimeFormatter[PATTERNS.length];
        for (int i = 0; i < PATTERNS.length; i++) {
            PARSERS[i] = DateTimeFormat.forPattern(PATTERNS[i]);
        }
    }

    private DateTimeFormatter current = PARSERS[0];

    public DateTime parse(String formattedDate) {
        try {
            return current.parseDateTime(formattedDate);
        } catch (IllegalArgumentException e) {
            // try other parsers
        }

        for (int i = 0; i < PARSERS.length; i++) {
            DateTimeFormatter parser = PARSERS[i];
            if (parser == current) {
                continue;
            }
            try {
                DateTime result = parser.parseDateTime(formattedDate);
                current = parser;
                return result;
            } catch (IllegalArgumentException e) {
                // continue with next pattern
            }
        }

        throw new RuntimeException("Unable to parse date '" + formattedDate + "'");
    }

}