Examples of com.jayway.jsonpath.JsonPath

com.jayway.jsonpath.JsonPath
JsonPath is to JSON what XPATH is to XML, a simple way to extract parts of a given document. JsonPath is available in many programming languages such as Javascript, Python and PHP.
JsonPath allows you to compile a json path string to use it many times or to compile and apply in one single on demand operation.
Given the Json document:
```
 String json = "{ "store": { "book": [ { "category": "reference", "author": "Nigel Rees", "title": "Sayings of the Century", "price": 8.95 }, { "category": "fiction", "author": "Evelyn Waugh", "title": "Sword of Honour", "price": 12.99 } ], "bicycle": { "color": "red", "price": 19.95 } } }"; 
```
A JsonPath can be compiled and used as shown:
JsonPath path = JsonPath.compile("$.store.book[1]"); List<Object> books = path.read(json);
Or:
List<Object> authors = JsonPath.read(json, "$.store.book[*].author")
If the json path returns a single value (is definite):
String author = JsonPath.read(json, "$.store.book[1].author")

    }


    @Test
    public void read_store_book_1() throws Exception {


        JsonPath path = JsonPath.compile("$.store.book[1]");


        Map map = path.read(DOCUMENT);


        assertEquals("Evelyn Waugh", map.get("author"));
    }

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        assertEquals("Evelyn Waugh", map.get("author"));
    }


    @Test
    public void read_store_book_wildcard() throws Exception {
        JsonPath path = JsonPath.compile("$.store.book[*]");


        List<Object> list = path.read(DOCUMENT);
        Assertions.assertThat(list.size()).isEqualTo(4);


    }

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    @Path("/validate")
    @Produces(MediaType.APPLICATION_JSON)
    public Response validate(@QueryParam("path") String path) {
        int result = -1;
        try {
            JsonPath compiled = JsonPath.compile(path);
            result = compiled.isDefinite() ? 0 : 1;
        } catch (Exception e) {
        }
        return Response.ok(Collections.singletonMap("result", result)).build();
    }

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  }


  public SpinJsonTreePathQuery jsonPath(String expression) {
    ensureNotNull("expression", expression);
    try {
      JsonPath query = JsonPath.compile(expression);
      return new SpinJsonJacksonPathQuery(this, query, dataFormat);
    } catch(InvalidPathException pex) {
      throw LOG.unableToCompileJsonPathExpression(expression, pex);
    } catch(IllegalArgumentException aex) {
      throw LOG.unableToCompileJsonPathExpression(expression, aex);

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  public static void main(String... args) throws Exception {


    RestTemplate template = new RestTemplate();
    String response = template.getForObject(URI_TEMPLATE, String.class, MILESTONE_ID);


    JsonPath titlePath = JsonPath.compile("$[*].title");
    JsonPath idPath = JsonPath.compile("$[*].number");


    JSONArray titles = titlePath.read(response);
    Iterator<Object> ids = ((JSONArray) idPath.read(response)).iterator();


    System.out.println("Milestone - " + JsonPath.read(response, "$[1].milestone.title"));


    for (Object title : titles) {

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    public void writeValue(String jsonPathExpression, Object value) {
        PlainJavaJsonProvider provider = new PlainJavaJsonProvider();
        Configuration configuration = Configuration.builder().jsonProvider(provider).build();
        jsonObject = provider.parse(currentJson);
        JsonPath path = JsonPath.compile(jsonPathExpression);
        LinkedList<PathToken> pathTokens = getPathTokensFrom(path);
        PathToken endToken = pathTokens.removeLast();
        int index = pathTokens.size();
        JsonWriteDecorator writeDecorator = new JsonWriteDecorator(provider, index, endToken, value);
        pathTokens.addLast(writeDecorator);
        path.read(jsonObject, configuration);
        jsonObject = MutableValue.FROM_MUTABLE_VALUE.apply(jsonObject);
        currentJson = buildJsonStringFrom(jsonObject);
    }

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    }


    public <T> T readObjectValue(String jsonPathExpression) {
        PlainJavaJsonProvider provider = new PlainJavaJsonProvider();
        Configuration configuration = Configuration.builder().jsonProvider(provider).build();
        JsonPath jsonPath = JsonPath.compile(jsonPathExpression);
        return jsonPath.read(jsonObject, configuration);
    }

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