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org.docx4j.model.fields.DateFormatInferencer Maven / Gradle / Ivy
/**
*
*/
package org.docx4j.model.fields;
import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.Map;
import org.docx4j.Docx4jProperties;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* From http://stackoverflow.com/questions/3389348/parse-any-date-in-java
* with modifications for locale
*
* See http://stackoverflow.com/questions/3307330/using-joda-date-time-api-to-parse-multiple-formats
* for similar in Joda
*
*/
public class DateFormatInferencer {
private static Logger log = LoggerFactory.getLogger(DateFormatInferencer.class);
private static final Map DATE_FORMAT_REGEXPS = new HashMap();
static {
if (Docx4jProperties.getProperty("docx4j.Fields.Dates.DateFormatInferencer.USA", false)) {
// parse USA
log.info("Infering dates based using USA formats");
DATE_FORMAT_REGEXPS.put("^\\d{8}$", "yyyyMMdd");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}-\\d{1,2}-\\d{4}$", "MM-dd-yyyy");
// DATE_FORMAT_REGEXPS.put("^\\d{4}-\\d{1,2}-\\d{1,2}$", "yyyy-MM-dd");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}/\\d{1,2}/\\d{4}$", "MM/dd/yyyy");
// DATE_FORMAT_REGEXPS.put("^\\d{4}/\\d{1,2}/\\d{1,2}$", "yyyy/MM/dd");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{3}\\s\\d{4}$", "dd MMM yyyy");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{4,}\\s\\d{4}$", "dd MMMM yyyy");
// DATE_FORMAT_REGEXPS.put("^\\d{12}$", "yyyyMMddHHmm");
// DATE_FORMAT_REGEXPS.put("^\\d{8}\\s\\d{4}$", "yyyyMMdd HHmm");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}-\\d{1,2}-\\d{4}\\s\\d{1,2}:\\d{2}$", "MM-dd-yyyy HH:mm");
DATE_FORMAT_REGEXPS.put("^\\d{4}-\\d{1,2}-\\d{1,2}\\s\\d{1,2}:\\d{2}$", "yyyy-MM-dd HH:mm");
// DATE_FORMAT_REGEXPS.put("^\\d{1,2}/\\d{1,2}/\\d{4}\\s\\d{1,2}:\\d{2}$", "MM/dd/yyyy HH:mm");
// DATE_FORMAT_REGEXPS.put("^\\d{4}/\\d{1,2}/\\d{1,2}\\s\\d{1,2}:\\d{2}$", "yyyy/MM/dd HH:mm");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{3}\\s\\d{4}\\s\\d{1,2}:\\d{2}$", "dd MMM yyyy HH:mm");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{4,}\\s\\d{4}\\s\\d{1,2}:\\d{2}$", "dd MMMM yyyy HH:mm");
// DATE_FORMAT_REGEXPS.put("^\\d{14}$", "yyyyMMddHHmmss");
// DATE_FORMAT_REGEXPS.put("^\\d{8}\\s\\d{6}$", "yyyyMMdd HHmmss");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}-\\d{1,2}-\\d{4}\\s\\d{1,2}:\\d{2}:\\d{2}$", "MM-dd-yyyy HH:mm:ss");
// DATE_FORMAT_REGEXPS.put("^\\d{4}-\\d{1,2}-\\d{1,2}\\s\\d{1,2}:\\d{2}:\\d{2}$", "yyyy-MM-dd HH:mm:ss");
DATE_FORMAT_REGEXPS.put("^\\d{4}-\\d{1,2}-\\d{1,2}\\s\\d{1,2}:\\d{2}:\\d{2}\\.\\d{1,3}$", "yyyy-MM-dd HH:mm:ss.S");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}/\\d{1,2}/\\d{4}\\s\\d{1,2}:\\d{2}:\\d{2}$", "MM/dd/yyyy HH:mm:ss");
// DATE_FORMAT_REGEXPS.put("^\\d{4}/\\d{1,2}/\\d{1,2}\\s\\d{1,2}:\\d{2}:\\d{2}$", "yyyy/MM/dd HH:mm:ss");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{3}\\s\\d{4}\\s\\d{1,2}:\\d{2}:\\d{2}$", "dd MMM yyyy HH:mm:ss");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{4,}\\s\\d{4}\\s\\d{1,2}:\\d{2}:\\d{2}$", "dd MMMM yyyy HH:mm:ss");
// ("yyyy-MM-dd'T'HH:mm:ss"
} else {
// parse international
log.info("Infering dates based using International formats");
DATE_FORMAT_REGEXPS.put("^\\d{8}$", "yyyyMMdd");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}-\\d{1,2}-\\d{4}$", "dd-MM-yyyy");
// DATE_FORMAT_REGEXPS.put("^\\d{4}-\\d{1,2}-\\d{1,2}$", "yyyy-MM-dd");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}/\\d{1,2}/\\d{4}$", "dd/MM/yyyy");
// DATE_FORMAT_REGEXPS.put("^\\d{4}/\\d{1,2}/\\d{1,2}$", "yyyy/MM/dd");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{3}\\s\\d{4}$", "dd MMM yyyy");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{4,}\\s\\d{4}$", "dd MMMM yyyy");
// DATE_FORMAT_REGEXPS.put("^\\d{12}$", "yyyyMMddHHmm");
// DATE_FORMAT_REGEXPS.put("^\\d{8}\\s\\d{4}$", "yyyyMMdd HHmm");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}-\\d{1,2}-\\d{4}\\s\\d{1,2}:\\d{2}$", "dd-MM-yyyy HH:mm");
DATE_FORMAT_REGEXPS.put("^\\d{4}-\\d{1,2}-\\d{1,2}\\s\\d{1,2}:\\d{2}$", "yyyy-MM-dd HH:mm");
// DATE_FORMAT_REGEXPS.put("^\\d{1,2}/\\d{1,2}/\\d{4}\\s\\d{1,2}:\\d{2}$", "MM/dd/yyyy HH:mm");
// DATE_FORMAT_REGEXPS.put("^\\d{4}/\\d{1,2}/\\d{1,2}\\s\\d{1,2}:\\d{2}$", "yyyy/MM/dd HH:mm");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{3}\\s\\d{4}\\s\\d{1,2}:\\d{2}$", "dd MMM yyyy HH:mm");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{4,}\\s\\d{4}\\s\\d{1,2}:\\d{2}$", "dd MMMM yyyy HH:mm");
// DATE_FORMAT_REGEXPS.put("^\\d{14}$", "yyyyMMddHHmmss");
// DATE_FORMAT_REGEXPS.put("^\\d{8}\\s\\d{6}$", "yyyyMMdd HHmmss");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}-\\d{1,2}-\\d{4}\\s\\d{1,2}:\\d{2}:\\d{2}$", "dd-MM-yyyy HH:mm:ss");
// DATE_FORMAT_REGEXPS.put("^\\d{4}-\\d{1,2}-\\d{1,2}\\s\\d{1,2}:\\d{2}:\\d{2}$", "yyyy-MM-dd HH:mm:ss");
DATE_FORMAT_REGEXPS.put("^\\d{4}-\\d{1,2}-\\d{1,2}\\s\\d{1,2}:\\d{2}:\\d{2}\\.\\d{1,3}$", "yyyy-MM-dd HH:mm:ss.S");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}/\\d{1,2}/\\d{4}\\s\\d{1,2}:\\d{2}:\\d{2}$", "dd/MM/yyyy HH:mm:ss");
// DATE_FORMAT_REGEXPS.put("^\\d{4}/\\d{1,2}/\\d{1,2}\\s\\d{1,2}:\\d{2}:\\d{2}$", "yyyy/MM/dd HH:mm:ss");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{3}\\s\\d{4}\\s\\d{1,2}:\\d{2}:\\d{2}$", "dd MMM yyyy HH:mm:ss");
DATE_FORMAT_REGEXPS.put("^\\d{1,2}\\s[a-z]{4,}\\s\\d{4}\\s\\d{1,2}:\\d{2}:\\d{2}$", "dd MMMM yyyy HH:mm:ss");
}
}
/**
* Determine SimpleDateFormat pattern matching with the given date string. Returns null if
* format is unknown. You can simply extend DateUtil with more formats if needed.
* @param dateString The date string to determine the SimpleDateFormat pattern for.
* @return The matching SimpleDateFormat pattern, or null if format is unknown.
* @see SimpleDateFormat
*/
public static String determineDateFormat(String dateString) {
for (String regexp : DATE_FORMAT_REGEXPS.keySet()) {
if (dateString.toLowerCase().matches(regexp)) {
return DATE_FORMAT_REGEXPS.get(regexp);
}
}
return null; // Unknown format.
}
public static void main(String[] args)
throws Exception {
System.out.println(determineDateFormat("21/3/2012"));
}
}
