Java Utililty Methods URI Value Check

List of utility methods to do URI Value Check

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Description

The list of methods to do URI Value Check are organized into topic(s).

Method

booleanisValidURI(String uriRef)
is Valid URI 
boolean isValid = !uriRef.matches("[\u0000-\u001F\u007F-\u009F]");
try {
    final java.net.URI uri = new java.net.URI(uriRef);
    isValid = uri.isAbsolute();
} catch (URISyntaxException e) {
    isValid = false;
return isValid;
...
booleanisValidURIorEmpty(String uri)
Check if the given input string is a valid URI 
if (uri == null || uri.trim().isEmpty()) {
    return true;
try {
    URI.create(uri);
    return true;
} catch (Exception e) {
    return false;
...
booleanisValidURIReference(String uriRef)
Verifies that the supplied string is a valid RDF (1.0) URI reference, as defined in section 6.4 of the RDF Concepts and Abstract Syntax specification (RDF 1.0 Recommendation of February 10, 2004). 
boolean valid = !uriRef.matches("[\u0000-\u001F\u007F-\u009F]");
if (valid) {
    final String escaped = escapeExcludedChars(uriRef);
    try {
        final java.net.URI uri = new java.net.URI(escaped);
        valid = uri.isAbsolute();
    } catch (URISyntaxException e) {
        valid = false;
...
booleanisVirtual(URI locationURI)
see issue 12500: we should check whether the resource is virtual

TODO as soon as 3.5 is not supported, use resource.isVirtual() call 

return locationURI == null || "virtual".equals(locationURI.getScheme());
booleanisVSO(final URI uri)
is VSO 
final String host = uri.getHost().toLowerCase();
if (host.endsWith(HOST_VSO) || host.endsWith(HOST_TFS_ALL_IN)) {
    return true;
} else {
    return false;
booleanisWellFormedUriString(final String uriString)
is Well Formed Uri String 
try {
    new URI(uriString);
    return true;
} catch (final URISyntaxException ignored) {
    return false;
URIvalidateURI(final String uri)
Just test to see if the given string can be parse into a URI. 
try {
    return new URI(uri);
} catch (final Exception mfue) {
return null;
voidvalidateUri(String uri)
validate Uri 
try {
    new URI(uri);
} catch (Exception e) {
    throw new Error(e);
StringvalidateURI(String uri)
Verifies the validity of a complete URI 
try {
    new URI(uri);
} catch (URISyntaxException e) {
    throw e;
return uri;
StringvalidateUri(String uri)
validate Uri 
final URL url;
try {
    url = new URL(uri);
} catch (Exception e1) {
    return ("'" + uri + "' is not a valid URL: " + e1.getLocalizedMessage());
if (!"http".equals(url.getProtocol())) {
    return ("'" + uri + "' is not a valid URL: Model name must use http protocol.");
...