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Getting element value from jsonpath whose root is an array


Getting element value from jsonpath whose root is an array

By : user3038852
Date : November 25 2020, 12:01 PM
hop of those help? You were right to start with the $. However, What you get with your particular JSON is List of HashMap where each JSON Object is represented as a single HashMap. Knowing that you can obtain the list of HashMaps like this:
code :
List<HashMap<String, Object>> jsonObjectsInArray = path.getList("$");
for (HashMap<String, Object> jsonObject : jsonObjectsInArray) {
    System.out.println(jsonObject.get("od_pair"));
}
7015400:8727100
7015400:8814001


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Array size using jsonpath expression - Stefan Goessner JsonPath

Array size using jsonpath expression - Stefan Goessner JsonPath


By : adam
Date : March 29 2020, 07:55 AM
should help you out It seems that support for returning the length() of an array was only added in version 2.1.0 of the jayway json-path library.
Based on some quick tests, the $.orders.length() expression seems to work with both version 2.1.0 and version 2.2.0, so I think you just need to upgrade your dependency version in order to fix the error you are seeing.
Verify the existence of an array of root nodes with JSONpath

Verify the existence of an array of root nodes with JSONpath


By : Tulunad Global
Date : March 29 2020, 07:55 AM
like below fixes the issue The root node operator is $ so you can just read $ into a map and that map will be keyed on your root node names.
For example:
code :
// Approach 1
Map<String, Object> read = JsonPath.read(json, "$");

assertThat(read.size(), is(2));

assertThat(read.keySet(), hasItem("tool"));
assertThat(read.keySet(), hasItem("book"));

// Approach 2: if you want a String[] then ...
String[] rootNodeNames = read.keySet().toArray(new String[read.size()]);
assertThat(rootNodeNames, Matchers.both(arrayWithSize(2)).and(arrayContainingInAnyOrder("book", "tool")));

// Approach 3: if you want to hide it all behind the hasJsonPath() matcher
// note: each of these assertion will cause your JSON string to be parsed 
// so it's more efficient to do that once and assert against the 
// resulting map as I did above
assertThat(json, hasJsonPath("$", Matchers.hasKey("tool")));
assertThat(json, hasJsonPath("$", Matchers.hasKey("book")));
JSONPath get an array element as JSON String

JSONPath get an array element as JSON String


By : DKRON311
Date : March 29 2020, 07:55 AM
Any of those help As I mentioned in comments JsonPath will read a JSON object and return it like so. It will be like a HashMap with the types being defined by what was parsed. If you, as you mentioned, wants the values as a Json after extracting it you need to convert what was read back to a Json again:
code :
public static void main(String[] args) {
    String response = "{ \"book\": [ " + 
            "      { \"category\": \"\"," + 
            "        \"author\": \"Nigel Rees\"," + 
            "        \"title\": \"Sayings of the Century\"," + 
            "        \"price\": \"\"" + 
            "      }," + 
            "      { \"category\": \"fiction\"," + 
            "        \"author\": \"\"," + 
            "        \"title\": \"Sword of Honour\"," + 
            "        \"price\": \"12.99\"" + 
            "      }," + 
            "      { \"category\": \"fiction\"," + 
            "        \"author\": \"Herman Melville\"," + 
            "        \"title\": \"Moby Dick\"," + 
            "        \"isbn\": \"0-553-21311-3\"," + 
            "        \"price\": \"8.99\"" + 
            "      }," + 
            "      { \"category\": \"fiction\"," + 
            "        \"author\": \"J. R. R. Tolkien\"," + 
            "        \"title\": \"The Lord of the Rings\"," + 
            "        \"isbn\": \"0-395-19395-8\"," + 
            "        \"price\": 22.99" + 
            "      }" + 
            "    ]" + 
            "}";
    int length = JsonPath.read(response, "$.book.length()");
    System.out.println(length);
    Configuration conf = Configuration.defaultConfiguration();

    Object document = Configuration.defaultConfiguration().jsonProvider().parse(response);

    for (int i = 0; i < length; i++) {
        String json = conf.jsonProvider().toJson(JsonPath.read(document, "$.book["+i+"]"));
        System.out.println(json);
        //process(json);
    }
}
{"category":"","author":"Nigel Rees","title":"Sayings of the Century","price":""}
{"category":"fiction","author":"","title":"Sword of Honour","price":"12.99"}
{"category":"fiction","author":"Herman Melville","title":"Moby Dick","isbn":"0-553-21311-3","price":"8.99"}
{"category":"fiction","author":"J. R. R. Tolkien","title":"The Lord of the Rings","isbn":"0-395-19395-8","price":22.99}
JSONPath and Traverson filtering: single element array

JSONPath and Traverson filtering: single element array


By : user3052341
Date : December 15 2020, 09:21 AM
wish of those help Here is the Json I am trying to handle with Traverson to extract a single link from this HAL: , The code necessary to achieve what I should look like this:
code :
JsonPathLinkDiscoverer disc = new JsonPathLinkDiscoverer("$._embedded..auth.._links..['%s']..href", MediaTypes.HAL_JSON);
Link authLink = disc.findLinksWithRel("auth:default", <json>).get(0);
How to find last element in Array list using jsonpath expression?

How to find last element in Array list using jsonpath expression?


By : Deepak Grover
Date : March 29 2020, 07:55 AM
I wish this helpful for you As you can read in the docs you can ether do a
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