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  4. Using UriTemplate to Change Path Parameters in a URI

Using UriTemplate to Change Path Parameters in a URI

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Gerard Davison user avatar
Gerard Davison
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Mar. 01, 13 · Interview
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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.

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  • How To Connect a Heroku Java App to a Cloud-Native Database
  • How to Access URI and Query Parameter Inside Kumologica API
  • Spring Boot REST Template URI Encoding

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