Examples of org.json.JSONStringer

org.json.JSONStringer
JSONStringer provides a quick and convenient way of producing JSON text. The texts produced strictly conform to JSON syntax rules. No whitespace is added, so the results are ready for transmission or storage. Each instance of JSONStringer can produce one JSON text.
A JSONStringer instance provides a value method for appending values to the text, and a key method for adding keys before values in objects. There are array and endArray methods that make and bound array values, and object and endObject methods which make and bound object values. All of these methods return the JSONWriter instance, permitting cascade style. For example,
```
 myString = new JSONStringer().object().key("JSON").value("Hello, World!") .endObject().toString(); 
```
which produces the string
```
 {"JSON":"Hello, World!"} 
```
The first method called must be array or object. There are no methods for adding commas or colons. JSONStringer adds them for you. Objects and arrays can be nested up to 20 levels deep.
This can sometimes be easier than using a JSONObject to build a string. @author JSON.org @version 2008-09-18

   public void marshal(ReadResourceModel model, OutputStream outputStream, boolean pretty) throws BindingException
   {
      PrintWriter printWriter = new PrintWriter(outputStream);
      try
      {
         JSONStringer json = new JSONStringer();
         json.object().key("description").value(model.getDescription());
         json.key("children").array();
         for (String child : model.getChildren())
         {
            json.object().key("name").value(child);
            NamedDescription nd = model.getChildDescription(child);
            if (nd != null)
            {
               json.key("description").value(nd.getDescription());
            }
            json.endObject();
         }
         json.endArray().key("operations").array();
         for (NamedDescription nd : model.getOperations())
         {
            json.object().key("operation-name").value(nd.getName()).key("operation-description").value(nd.getDescription()).endObject();
         }
         json.endArray().endObject();


         JSONObject output = new JSONObject(json.toString());
         if (pretty)
         {
            printWriter.write(output.toString(3));
         }
         else

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            } catch (Exception e) {
              e.printStackTrace();
            }
        }
        
          JSONStringer stringer = new JSONStringer();
          MfGeoJSONWriter builder = new MfGeoJSONWriter(stringer);
          builder.encodeFeatureCollection(new MfFeatureCollection(outputFeatureCollection));
          
          servletIOManager.tryToWriteBackToClient(stringer.toString());
      
    } catch(Throwable t) {
      t.printStackTrace();
    } finally {
      logger.debug("OUT");

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    }
    return null;
  }


  public static String getSampleJsonString(int numRows) {
    JSONStringer x = new JSONStringer();
    Random rand = new Random(0);
    try {
      JSONWriter top = x.array();
      for (int i = 1; i <= numRows; i++) {
        JSONWriter o = top.object();
        o.key("a").value("a" + i);


        o.key("b").value("b" + i);


        JSONWriter c = o.key("c").array();
        for (int ci = 1; ci <= 10; ci++) {
          JSONWriter co = c.object();
          co.key("c.1").value("c.1_" + ci);
          if (rand.nextBoolean()) {
            co.key("c.2").value("c.2_" + ci);
          }


          if (rand.nextBoolean()) {
            JSONWriter c3a = co.key("c.3").array();


            for (int c3i = 1; c3i < rand.nextInt(10) + 1; c3i++) {
              JSONWriter c3o = c3a.object();
              if (rand.nextBoolean()) {
                co.key("c.3.1").value(
                    "c.3.1_" + c3i + "+" + ci + "+" + i);
              }
              if (rand.nextBoolean()) {
                co.key("c.3.2").value("c.3.2_" + c3i);
              }
              if (rand.nextBoolean()) {
                co.key("c.3.3").value("c.3.3_" + c3i);
              }
              if (rand.nextBoolean()) {
                JSONWriter c34o = co.key("c.3.4").object();
                c34o.key("c.3.4.1").value("c.3.4.1_X");
                c34o.key("c.3.4.2").value("c.3.4.1_Y");
                c34o.endObject();
              }
              c3o.endObject();
            }


            c3a.endArray();
          }


          co.endObject();
        }
        c.endArray();


        // List of primitive values.
        JSONWriter d = o.key("d").array();
        for (int di = 1; di < rand.nextInt(10) + 1; di++) {
          d.value("d" + di);
        }
        d.endArray();


        JSONWriter e = o.key("e").array();
        for (int ei = 1; ei < rand.nextInt(10) + 1; ei++) {
          if (rand.nextBoolean()) {
            e.value("e" + ei + "+" + i);
          } else {
            e.object().key("e.1").value("e.1_" + ei).key("e.2")
                .value("e.2_" + ei).endObject();
          }
        }
        e.endArray();


        o.endObject();
      }
      top.endArray();
    } catch (JSONException e) {
      e.printStackTrace();
      return null;
    }


    return x.toString();
  }

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    return x.toString();
  }


  public static String getJsonForUnitTest1() {
    JSONStringer x = new JSONStringer();
    Random rand = new Random(0);
    try {
      JSONWriter top = x.array();
      for (int i = 1; i <= 2; i++) {
        JSONWriter o = top.object();
        o.key("a").value("a" + i);


        o.key("b").value("b" + i);


        JSONWriter c = o.key("c").array();
        for (int ci = 1; ci <= 10; ci++) {
          JSONWriter co = c.object();
          co.key("c.1").value("c.1_" + ci);
          if (rand.nextBoolean()) {
            co.key("c.2").value("c.2_" + ci);
          }


          if (rand.nextBoolean()) {
            //
          }


          co.endObject();
        }
        c.endArray();


        // List of primitive values.
        JSONWriter d = o.key("d").array();
        for (int di = 1; di < rand.nextInt(10) + 1; di++) {
          d.value("d" + di);
        }
        d.endArray();


        JSONWriter e = o.key("e").array();
        for (int ei = 1; ei < rand.nextInt(10) + 1; ei++) {
          if (rand.nextBoolean()) {
            e.value("e" + ei + "+" + i);
          } else {
            e.object().key("e.1").value("e.1_" + ei).key("e.2")
                .value("e.2_" + ei).endObject();
          }
        }
        e.endArray();


        o.endObject();
      }
      top.endArray();
    } catch (JSONException e) {
      e.printStackTrace();
      return null;
    }


    return x.toString();
  }

View Full Code Here


    return x.toString();
  }


  public static String getJsonForUnitTest4() {
    JSONStringer x = new JSONStringer();
    Random rand = new Random(0);
    try {
      JSONWriter top = x.array();
      for (int i = 1; i <= 1; i++) {
        JSONWriter o = top.object();


        JSONWriter c = o.key("c").array();
        for (int ci = 1; ci <= 3; ci++) {
          JSONWriter co = c.object();
          if (rand.nextBoolean()) {
            co.key("c.2").value("c.2_" + ci);
          }


          if (rand.nextBoolean()) {
            JSONWriter c3a = co.key("c.3").array();


            for (int c3i = 1; c3i < 3; c3i++) {
              JSONWriter c3o = c3a.object();
              if (rand.nextBoolean()) {
                co.key("c.3.1").value(
                    "c.3.1_" + c3i + "+" + ci + "+" + i);
              }
              if (rand.nextBoolean()) {
                co.key("c.3.3").value("c.3.3_" + c3i);
              }
              if (rand.nextBoolean()) {
                JSONWriter c34o = co.key("c.3.4").object();
                c34o.key("c.3.4.2").value("c.3.4.1_Y");
                c34o.endObject();
              }
              c3o.endObject();
            }


            c3a.endArray();
          }


          co.endObject();
        }
        c.endArray();


        o.endObject();
      }
      top.endArray();
    } catch (JSONException e) {
      e.printStackTrace();
      return null;
    }


    return x.toString();
  }

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    return x.toString();
  }


  public static String getJsonForUnitTest5() {
    JSONStringer x = new JSONStringer();
    Random rand = new Random(0);
    try {
      JSONWriter top = x.array();
      for (int i = 1; i <= 1; i++) {
        JSONWriter o = top.object();


        JSONWriter c = o.key("c").array();
        for (int ci = 1; ci <= 4; ci++) {
          JSONWriter co = c.object();
          co.key("c.1").value("c.1_" + ci);
          if (rand.nextBoolean()) {
            // Need the call to rand to make the test come out
            // right.
          }


          if (rand.nextBoolean()) {
            JSONWriter c3a = co.key("c.3").array();


            for (int c3i = 1; c3i < rand.nextInt(10) + 1; c3i++) {
              JSONWriter c3o = c3a.object();
              if (rand.nextBoolean()) {
                co.key("c.3.1").value(
                    "c.3.1_" + c3i + "+" + ci + "+" + i);
              }
              if (rand.nextBoolean()) {
                co.key("c.3.2").value("c.3.2_" + c3i);
              }
              if (rand.nextBoolean()) {
                co.key("c.3.3").value("c.3.3_" + c3i);
              }
              if (rand.nextBoolean()) {
                JSONWriter c34o = co.key("c.3.4").object();
                c34o.key("c.3.4.1").value("c.3.4.1_X");
                c34o.key("c.3.4.2").value("c.3.4.1_Y");
                c34o.endObject();
              }
              c3o.endObject();
            }


            c3a.endArray();
          }


          co.endObject();
        }
        c.endArray();


        JSONWriter e = o.key("e").array();
        for (int ei = 1; ei < 6; ei++) {
          if (rand.nextBoolean()) {
            e.value("e" + ei + "+" + i);
          } else {
            e.object().key("e.1").value("e.1_" + ei).endObject();
          }
        }
        e.endArray();


        o.endObject();
      }
      top.endArray();
    } catch (JSONException e) {
      e.printStackTrace();
      return null;
    }


    return x.toString();
  }

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    return x.toString();
  }


  public static String getJsonForUnitTest6() {
    JSONStringer x = new JSONStringer();
    Random rand = new Random(0);
    try {
      JSONWriter top = x.array();
      for (int i = 1; i <= 1; i++) {
        JSONWriter o = top.object();


        JSONWriter c = o.key("c").array();
        for (int ci = 1; ci <= 1; ci++) {
          JSONWriter co = c.object();
          // co.key("c.1").value("c.1_" + ci);
          if (rand.nextBoolean()) {
            // Need the call to rand to make the test come out
            // right.
          }


          if (rand.nextBoolean()) {
            JSONWriter c3a = co.key("c.3").array();
            for (int c3i = 1; c3i <= 2; c3i++) {
              JSONWriter c3o = c3a.object();
              if (rand.nextBoolean()) {
                co.key("c.3.1").value(
                    "c.3.1_" + c3i + "+" + ci + "+" + i);
              }
              if (rand.nextBoolean()) {
                JSONWriter c34o = co.key("c.3.4").object();
                c34o.key("c.3.4.1").value("c.3.4.1_X");
                c34o.endObject();
              }
              c3o.endObject();
            }


            c3a.endArray();
          }


          co.endObject();
        }
        c.endArray();


        JSONWriter e = o.key("e").array();
        for (int ei = 1; ei <= 3; ei++) {
          e.object().key("e.1").value("e.1_" + ei).endObject();
        }
        e.endArray();


        o.endObject();
      }
      top.endArray();
    } catch (JSONException e) {
      e.printStackTrace();
      return null;
    }


    return x.toString();
  }

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  }


  public static Worksheet createJsonWithFunnyCharacters(Workspace workspace) {
    try {


      JSONStringer x = new JSONStringer();
      String html = "<ul><li>item 1</li></ul>";
      x.object().key("double quote")
          .value("string with \"double quotes\"")
          .key("single quotes")
          .value("'starts has ' and \"ends\" with '").key("tabs")
          .value("there is a tab between \"x\" and \"y\": x\ty")
          .key("newlines").value("there sho\nuld be a newline")
          .key("HTML").value(html).key("URL").value("http://cnn.com")
          .endObject();


      JsonImport ji = new JsonImport(x.toString(),
          "Funny Characters", workspace, "UTF-8", -1);
      Worksheet w = ji.generateWorksheet();
      return w;
    } catch (JSONException e) {
      e.printStackTrace();

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  public static Worksheet createSampleJsonWithEmptyNestedTable1(
      Workspace workspace) {
    try {


      JSONStringer x = new JSONStringer();


      JSONWriter topA = x.array();
      topA.object().key("a").value("a_1").key("b").array()
          //
          .object().key("b.1").value("b.1_1").key("b.2")
          .value("b.2_1").endObject()
          //
          // .object().key("b.1").value("b.1_2").key("b.2")
          // .value("b.2_2").endObject()
          //
          .endArray().endObject();


      topA.object().key("a").value("a_2").endObject();


      topA.endArray();


      JsonImport ji = new JsonImport(x.toString(),
          "Empty Nested Table 1", workspace, "UTF-8", -1);
      Worksheet w = ji.generateWorksheet();
      return w;
    } catch (JSONException e) {
      e.printStackTrace();

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  public static Worksheet createSampleJsonWithEmptyNestedTable2(
      Workspace workspace) {
    try {


      JSONStringer x = new JSONStringer();


      JSONWriter topA = x.array();
      topA.object().key("a").value("a_1").key("b").array()
          //
          .object().key("b.1").value("b.1_1").key("b.2")
          .value("b.2_1").endObject()
          //
          .object().key("b.1").value("b.1_2").endObject()
          //
          .endArray().endObject();


      topA.object().key("a").value("a_2").endObject();


      topA.endArray();


      JsonImport ji = new JsonImport(x.toString(),
          "Empty Nested Table 2", workspace, "UTF-8", -1);
      Worksheet w = ji.generateWorksheet();
      return w;
    } catch (JSONException e) {
      e.printStackTrace();

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