Is there a Java standalone implementation to extract values of parameters in an URI as defined by an URI-Template (RFC 6570)?
The best implementation I've found is a ruby implementation ( https://github.com/sporkmonger/addressable )
Via http://code.google.com/p/uri-templates/wiki/Implementations I found a Java implementation: Handy-URI-Templates
It supports the resolution of an URI-Template with parameter values to a final URI. Unfortunately, it can not do the reverse: extraction of parameter values in the URI according URI-Template.
Implentations of the JAX-RS (or Restlet) have this feature internally. But none seems to have isolated this feature module which could used independently.
Does anyone have another idea?
Here a example to Use spring-Web :
import org.springframework.web.util.UriTemplate;
public class UriParserSpringImpl implements UriParser {
private final UriTemplate uriTemplate;
private final String uriTemplateStr;
public UriParserSpringImpl(final String template) {
this.uriTemplateStr = template;
this.uriTemplate = new UriTemplate(template);
}
@Override
public Map<String, String> parse(final String uri) {
final boolean match = this.uriTemplate.matches(uri);
if (!match) {
return null;
}
return uriUtils.decodeParams(this.uriTemplate.match(uri));
}
@Override
public Set<String> getVariables() {
return Collections.unmodifiableSet(new LinkedHashSet<String>(this.uriTemplate.getVariableNames()));
}
}
Another for Jersey (JAX-RS implementation) :
import com.sun.jersey.api.uri.UriTemplate;
public class UriParserJerseyImpl implements UriParser {
private final UriTemplate uriTemplate;
private final Map<String, String> valuesMaps;
public UriParserJerseyImpl(final String template) {
this.uriTemplate = new UriTemplate(template);
final Map<String, String> valuesMaps = new HashMap<String, String>();
for (final String prop : this.uriTemplate.getTemplateVariables()) {
valuesMaps.put(prop, null);
}
this.valuesMaps = Collections.unmodifiableMap(valuesMaps);
}
@Override
public Map<String, String> parse(final String uri) {
final Map<String, String> values = new HashMap<String, String>(this.valuesMaps);
final boolean match = this.uriTemplate.match(uri, values);
if (!match) {
return null;
}
return values;
}
@Override
public Set<String> getVariables() {
return this.valuesMaps.keySet();
}
}
With interface :
public interface UriParser {
public Set<String> getVariables();
public Map<String, String> parse(final String uri);
}
