Using UriTemplate to Change Path Parameters in a URI
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
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