Using UriTemplate to Change Path Parameters in a URI

Gerard Davison

Mar. 01, 13 · Interview

Likes (2)

Comment

Save

43.2K Views

I have been recently working on a client generator in the wadl.java.net project and I was solving a bug where I wanted to change path parameter on a URI. This turned out to be quite easy with existing classes that are part of the Jersey project.

First of all you need a instance of UriTemplate, depending on the very of Jersey this is in a slightly different package - you IDE's automatic import will do the work for you.

String template = "http://example.com/name/{name}/age/{age}";
UriTemplate uriTemplate = new UriTemplate(template);

Then you use match(...) to extract them:

  String uri = "http://example.com/name/Bob/age/47";
  Map<String, String> parameters = new HashMap<>();

  // Not this method returns false if the URI doesn't match, ignored
  // for the purposes of the this blog.
  uriTemplate.match(uri, parameters);

Then you can replace the parameters at will and rebuild the URI:

  parameters.put("name","Arnold");

  UriBuilder builder = UriBuilder.fromPath(template);
  URI output = builder.build(parameters);

Uniform Resource Identifier

Published at DZone with permission of Gerard Davison, DZone MVB. See the original article here.

Opinions expressed by DZone contributors are their own.

Related

Trending

Using UriTemplate to Change Path Parameters in a URI

Related

Partner Resources