Java Utililty Methods Resource File

List of utility methods to do Resource File

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Description

The list of methods to do Resource File are organized into topic(s).

Method

StringgetFileName(final Object resource)

This method gives the resource file name. 

String fileName = null;
if (resource instanceof File) {
    fileName = ((File) resource).getName();
} else {
    fileName = getPath(resource);
    fileName = fileName.substring(fileName.lastIndexOf(File.separator) + 1, fileName.length());
return fileName;
...
FilegetFileResource(String resourceName)
Returns a File from a resource. 
try {
    return new File(Resources.getResource(resourceName).toURI());
} catch (final URISyntaxException e) {
    throw new RuntimeException(e);
InputStreamgetInputStream(String resourceOrFile, Class cls)
get Input Stream 
try {
    return getURL(resourceOrFile, cls).openStream();
} catch (Exception e) {
    throw new FileNotFoundException(resourceOrFile);
InputStreamgetInputStreamForResource(String s)
Uses getSourceForResource on the passed string and tries to open whatever resource is passed and return the correspondent open input stream. 
InputStream ret = null;
Object o = getSourceForResource(s);
if (o != null) {
    if (o instanceof File) {
        try {
            ret = new FileInputStream((File) o);
        } catch (FileNotFoundException e) {
    } else if (o instanceof URL) {
        try {
            ret = ((URL) o).openStream();
        } catch (IOException e) {
return ret;
longgetLastModificationForResource(String resourceId)
Get the last modification date if the resource resolves to a file. 
long ret = new Date().getTime();
Object o = getSourceForResource(resourceId);
if (o instanceof File) {
    ret = ((File) o).lastModified();
return ret;
longgetLastModified(final String resourceName)
Use this if last modified in File didnt work , possible in compressed file But it seem that it checks for the modification time for the hall compressed file it worth checking. 
try {
    final URL url = Integer.class.getResource(resourceName);
    if (url == null) {
        return -1;
    final URLConnection con = url.openConnection();
    final long lastModified = con.getLastModified();
    con.getInputStream().close();
...
URLgetParentResource(final Class c, final String resource)
get Parent Resource 
String name = c.getName();
name = name.substring(0, name.lastIndexOf("."));
name = name.substring(0, name.lastIndexOf(".") + 1);
name = name.replace(".", "/");
return c.getClassLoader().getResource(name + resource);
FilegetSampleDir(File resourcesDir)
get Sample Dir 
File file = new File(resourcesDir, "strokes");
if ((!file.exists()) && (!file.mkdirs()))
    throw new RuntimeException("mkdirs failed for " + file.getAbsolutePath());
return file;
StringgetShortName(String resource, Map nsMap)
Gets the short name of a resource 
StringBuilder shortName = new StringBuilder();
if (isFullIRI(resource)) {
    String prefix = getPrefix(getNamespace(resource), nsMap);
    if (prefix != null && !prefix.equals("")) {
        shortName.append(getPrefix(getNamespace(resource), nsMap));
        shortName.append(":");
        shortName.append(getElement(resource));
    } else {
...
ObjectgetSourceForResource(String s)
Analyze the passed string and determine if it specifies an existing file resource or URL. 
File f = new File(s);
if (f.exists())
    return f;
URL url = null;
try {
    url = new URL(s);
} catch (MalformedURLException e) {
if (url != null)
    return url;
return null;