com.darwinsys.io.FileNameUtils Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of darwinsys-api Show documentation
Show all versions of darwinsys-api Show documentation
Ian Darwin's assorted Java stuff,
assembled as an API.
package com.darwinsys.io;
/**
* Stuff for messing with filenames.
*/
public class FileNameUtils {
/**
* The name format we use; can be used for laying out templates etc.
*/
private static final String FILENAME_FORMAT = "YYYYMMDDHHMM";
/** Convert a date (or millis) into a String matching FILENAME_FORMAT.
* The %1 are needed throughout since we only pass one argument.
*/
private final static String FILENAME_PRINTF_TEMPLATE = "%1$tY%1$tm%1$td%1$tH%1$tM";
// This could become a facility for interpreting filename formats
// private static Map formatMap = new HashMap();
// static {
// formatMap.put("YYYY", "$tY");
// }
public static String getDefaultFilenameFormat() {
return FILENAME_FORMAT;
}
/** Return the next file name; given the suffix (which should NOT include
* a leading '.', since we provide that!)
* @param suffix The filename extention sans '.', e.g., "mp3"
* @return The filename, e.g., foo.mp3
*/
public static String getNextFilename(String suffix) {
return getNextFilenamePrefix() + "." + suffix;
}
/**
* Return the date/time formatted to match FILENAME_FORMAT.
* @return the formatted string
*/
public static String getNextFilenamePrefix() {
return String.format(FILENAME_PRINTF_TEMPLATE, System.currentTimeMillis());
}
}