Get keys from nested JSONObject fluently





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I'm trying to extract a value from a nested JSONObject, say "id". I'm using org.json.simple package and my code looks like:



JSONArray entries = (JSONArray) response.get("entries");
JSONObject entry = (JSONObject) entries.get(0);
JSONArray runs = (JSONArray) entry.get("runs");
JSONObject run = (JSONObject) runs.get(0);
String run_id = run.get("id").toString();


where response is a JSONObject.



Is it possible to refactor the code using Fluent Interface Pattern so the code is more readable? For example,



String run_id = response.get("entries")
.get(0)
.get("runs")
.get(0)
.get("id").toString();


Thanks in advance.










share|improve this question





























    0















    I'm trying to extract a value from a nested JSONObject, say "id". I'm using org.json.simple package and my code looks like:



    JSONArray entries = (JSONArray) response.get("entries");
    JSONObject entry = (JSONObject) entries.get(0);
    JSONArray runs = (JSONArray) entry.get("runs");
    JSONObject run = (JSONObject) runs.get(0);
    String run_id = run.get("id").toString();


    where response is a JSONObject.



    Is it possible to refactor the code using Fluent Interface Pattern so the code is more readable? For example,



    String run_id = response.get("entries")
    .get(0)
    .get("runs")
    .get(0)
    .get("id").toString();


    Thanks in advance.










    share|improve this question

























      0












      0








      0








      I'm trying to extract a value from a nested JSONObject, say "id". I'm using org.json.simple package and my code looks like:



      JSONArray entries = (JSONArray) response.get("entries");
      JSONObject entry = (JSONObject) entries.get(0);
      JSONArray runs = (JSONArray) entry.get("runs");
      JSONObject run = (JSONObject) runs.get(0);
      String run_id = run.get("id").toString();


      where response is a JSONObject.



      Is it possible to refactor the code using Fluent Interface Pattern so the code is more readable? For example,



      String run_id = response.get("entries")
      .get(0)
      .get("runs")
      .get(0)
      .get("id").toString();


      Thanks in advance.










      share|improve this question














      I'm trying to extract a value from a nested JSONObject, say "id". I'm using org.json.simple package and my code looks like:



      JSONArray entries = (JSONArray) response.get("entries");
      JSONObject entry = (JSONObject) entries.get(0);
      JSONArray runs = (JSONArray) entry.get("runs");
      JSONObject run = (JSONObject) runs.get(0);
      String run_id = run.get("id").toString();


      where response is a JSONObject.



      Is it possible to refactor the code using Fluent Interface Pattern so the code is more readable? For example,



      String run_id = response.get("entries")
      .get(0)
      .get("runs")
      .get(0)
      .get("id").toString();


      Thanks in advance.







      java fluent-interface






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Jan 4 at 10:30









      Eric HungEric Hung

      16516




      16516
























          1 Answer
          1






          active

          oldest

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          3














          Here's a possibility.



          class FluentJson {
          private Object value;

          public FluentJson(Object value) {
          this.value = value;
          }

          public FluentJson get(int index) throws JSONException {
          JSONArray a = (JSONArray) value;
          return new FluentJson(a.get(index));
          }

          public FluentJson get(String key) throws JSONException {
          JSONObject o = (JSONObject) value;
          return new FluentJson(o.get(key));
          }

          public String toString() {
          return value == null ? null : value.toString();
          }

          public Number toNumber() {
          return (Number) value;
          }
          }


          You can use it like this



          String run_id = new FluentJson(response)
          .get("entries")
          .get(0)
          .get("runs")
          .get(0)
          .get("id").toString();





          share|improve this answer
























          • How about returning this by adding value = a and value = o after a and o are assigned respectively?

            – Eric Hung
            Jan 7 at 4:04






          • 1





            That also works.

            – Leo Aso
            Jan 7 at 9:13












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          1 Answer
          1






          active

          oldest

          votes








          1 Answer
          1






          active

          oldest

          votes









          active

          oldest

          votes






          active

          oldest

          votes









          3














          Here's a possibility.



          class FluentJson {
          private Object value;

          public FluentJson(Object value) {
          this.value = value;
          }

          public FluentJson get(int index) throws JSONException {
          JSONArray a = (JSONArray) value;
          return new FluentJson(a.get(index));
          }

          public FluentJson get(String key) throws JSONException {
          JSONObject o = (JSONObject) value;
          return new FluentJson(o.get(key));
          }

          public String toString() {
          return value == null ? null : value.toString();
          }

          public Number toNumber() {
          return (Number) value;
          }
          }


          You can use it like this



          String run_id = new FluentJson(response)
          .get("entries")
          .get(0)
          .get("runs")
          .get(0)
          .get("id").toString();





          share|improve this answer
























          • How about returning this by adding value = a and value = o after a and o are assigned respectively?

            – Eric Hung
            Jan 7 at 4:04






          • 1





            That also works.

            – Leo Aso
            Jan 7 at 9:13
















          3














          Here's a possibility.



          class FluentJson {
          private Object value;

          public FluentJson(Object value) {
          this.value = value;
          }

          public FluentJson get(int index) throws JSONException {
          JSONArray a = (JSONArray) value;
          return new FluentJson(a.get(index));
          }

          public FluentJson get(String key) throws JSONException {
          JSONObject o = (JSONObject) value;
          return new FluentJson(o.get(key));
          }

          public String toString() {
          return value == null ? null : value.toString();
          }

          public Number toNumber() {
          return (Number) value;
          }
          }


          You can use it like this



          String run_id = new FluentJson(response)
          .get("entries")
          .get(0)
          .get("runs")
          .get(0)
          .get("id").toString();





          share|improve this answer
























          • How about returning this by adding value = a and value = o after a and o are assigned respectively?

            – Eric Hung
            Jan 7 at 4:04






          • 1





            That also works.

            – Leo Aso
            Jan 7 at 9:13














          3












          3








          3







          Here's a possibility.



          class FluentJson {
          private Object value;

          public FluentJson(Object value) {
          this.value = value;
          }

          public FluentJson get(int index) throws JSONException {
          JSONArray a = (JSONArray) value;
          return new FluentJson(a.get(index));
          }

          public FluentJson get(String key) throws JSONException {
          JSONObject o = (JSONObject) value;
          return new FluentJson(o.get(key));
          }

          public String toString() {
          return value == null ? null : value.toString();
          }

          public Number toNumber() {
          return (Number) value;
          }
          }


          You can use it like this



          String run_id = new FluentJson(response)
          .get("entries")
          .get(0)
          .get("runs")
          .get(0)
          .get("id").toString();





          share|improve this answer













          Here's a possibility.



          class FluentJson {
          private Object value;

          public FluentJson(Object value) {
          this.value = value;
          }

          public FluentJson get(int index) throws JSONException {
          JSONArray a = (JSONArray) value;
          return new FluentJson(a.get(index));
          }

          public FluentJson get(String key) throws JSONException {
          JSONObject o = (JSONObject) value;
          return new FluentJson(o.get(key));
          }

          public String toString() {
          return value == null ? null : value.toString();
          }

          public Number toNumber() {
          return (Number) value;
          }
          }


          You can use it like this



          String run_id = new FluentJson(response)
          .get("entries")
          .get(0)
          .get("runs")
          .get(0)
          .get("id").toString();






          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Jan 4 at 11:37









          Leo AsoLeo Aso

          5,57711229




          5,57711229













          • How about returning this by adding value = a and value = o after a and o are assigned respectively?

            – Eric Hung
            Jan 7 at 4:04






          • 1





            That also works.

            – Leo Aso
            Jan 7 at 9:13



















          • How about returning this by adding value = a and value = o after a and o are assigned respectively?

            – Eric Hung
            Jan 7 at 4:04






          • 1





            That also works.

            – Leo Aso
            Jan 7 at 9:13

















          How about returning this by adding value = a and value = o after a and o are assigned respectively?

          – Eric Hung
          Jan 7 at 4:04





          How about returning this by adding value = a and value = o after a and o are assigned respectively?

          – Eric Hung
          Jan 7 at 4:04




          1




          1





          That also works.

          – Leo Aso
          Jan 7 at 9:13





          That also works.

          – Leo Aso
          Jan 7 at 9:13




















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