Examples of org.codehaus.jackson.type.TypeReference

org.codehaus.jackson.type.TypeReference
r.blogspot.com/2006/12/super-type-tokens.html" >http://gafter.blogspot.com/2006/12/super-type-tokens.html, Additional idea (from a suggestion made in comments of the article) is to require bogus implementation of Comparable (any such generic interface would do, as long as it forces a method with generic type to be implemented). to ensure that a Type argument is indeed given.
Usage is by sub-classing: here is one way to instantiate reference to generic type List<Integer>:
```
 TypeReference ref = new TypeReference<List<Integer>>() { }; 
```
which can be passed to methods that accept TypeReference.


    // TODO, assume the url is a file path for now.
    java.nio.file.Path preferenceFile = Paths.get(preferenceFileUrl);
    try {
      ObjectMapper om = new ObjectMapper();
      TypeReference readType = new TypeReference<HashMap<String, Object>>() {
      };
      Map<String, Object> prefs = om.readValue(preferenceFile.toFile(), readType);
      Boolean oldValue = (Boolean) prefs.get("allow-anonymous-usage-tracking");
      // If value changed, write it to the file too
      if ((this.isAllowAnonymousTracking == null && oldValue != null)

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    // TODO, assume the url is a file path for now.
    java.nio.file.Path preferenceFile = Paths.get(preferenceFileUrl);
    try {
      ObjectMapper om = new ObjectMapper();
      TypeReference readType = new TypeReference<HashMap<String, Object>>() {
      };
      Map<String, Object> prefs = om.readValue(preferenceFile.toFile(), readType);
      Boolean oldValue = (Boolean) prefs.get("advanced-mode");
      // If value changed, write it to the file too
      if ((this.isUseAdvancedMode == null && oldValue != null)

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    @Test
    public void CollectionReadTest() {
        ObjectMapper mapper = new ObjectMapper();
        Map<Integer, Movie> movieMap = new HashMap<>();
        TypeReference thisMap = new TypeReference<Map<Integer, Movie>>() {};
        ResponseEntity<String> r = rest.getForEntity(rootURL + "/example/movies/", String.class, "");
        assertEquals(r.getStatusCode(), HttpStatus.OK);


        try {
            movieMap = mapper.readValue(r.getBody(), thisMap);

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    @Test
    public void ItemReadTest() {
        ObjectMapper mapper = new ObjectMapper();
        Movie m = new Movie();
        TypeReference thisElement = new TypeReference<Movie>() {};
        ResponseEntity<String> r = rest.getForEntity(rootURL + "/example/movies/2", String.class, "");
        assertEquals(r.getStatusCode(), HttpStatus.OK);


        try {
            m = mapper.readValue(r.getBody(), thisElement);

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        rest.put(rootURL + "/example/movies/Kill Bill Volume 2/pg16/Quentin Tarantino",null);
        ObjectMapper mapper = new ObjectMapper();


        // Check that it is actually there.
        Movie m = new Movie();
        TypeReference thisElement = new TypeReference<Movie>() {};
        ResponseEntity<String> r = rest.getForEntity(rootURL + "/example/movies/3", String.class, "");
        assertEquals(r.getStatusCode(), HttpStatus.OK);


        try {
            m = mapper.readValue(r.getBody(), thisElement);

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