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

        
        try {
            FileOutputStream out = new FileOutputStream(file);
            
            // First construct an index that allows us to quickly find the partitions that we want
            JSONStringer stringer = (JSONStringer)(new JSONStringer().object());
            int offset = 1;
            for (Integer partition : sorted) {
                stringer.key(partition.toString()).value(offset++);
            } // FOR
            out.write((stringer.endObject().toString() + "\n").getBytes());
            
            // Now Loop through each file individually so that we only have to load one into memory at a time
            for (Integer partition : sorted) {
                File in = markovs.get(partition);
                try {
                    JSONObject json_object = new JSONObject(FileUtil.readFile(in));
                    MarkovGraphsContainer markov = MarkovGraphsContainerUtil.createMarkovGraphsContainer(json_object, procedures, catalog_db);
                    markov.load(in, catalog_db);
                    
                    stringer = (JSONStringer)new JSONStringer().object();
                    stringer.key(partition.toString()).object();
                    markov.toJSON(stringer);
                    stringer.endObject().endObject();
                    out.write((stringer.toString() + "\n").getBytes());
                } catch (Exception ex) {
                    throw new Exception(String.format("Failed to copy MarkovGraphsContainer for partition %d from '%s'", partition, in), ex);
                }
            } // FOR
            out.close();

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        int graphs_ctr = 0;
        try {
            FileOutputStream out = new FileOutputStream(output_path);
            
            // First construct an index that allows us to quickly find the partitions that we want
            JSONStringer stringer = (JSONStringer)(new JSONStringer().object());
            int offset = 1;
            for (Integer partition : sorted) {
                stringer.key(Integer.toString(partition)).value(offset++);
            } // FOR
            out.write((stringer.endObject().toString() + "\n").getBytes());
            
            // Now roll through each id and create a single JSONObject on each line
            for (Integer partition : sorted) {
                MarkovGraphsContainer markov = markovs.get(partition);
                assert(markov != null) : "Null MarkovGraphsContainer for partition #" + partition;
                graphs_ctr += markov.totalSize();
                
                stringer = (JSONStringer)new JSONStringer().object();
                stringer.key(partition.toString()).object();
                markov.toJSON(stringer);
                stringer.endObject().endObject();
                out.write((stringer.toString() + "\n").getBytes());
            } // FOR
            out.close();
        } catch (Exception ex) {
            LOG.error("Failed to serialize the " + className + " file '" + output_path + "'", ex);
            throw new RuntimeException(ex);

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        // this abstract base class gets here if the children verify local members
        return true;
    }


    public String toJSONString() {
        JSONStringer stringer = new JSONStringer();
        try {
        stringer.object();
        toJSONString(stringer);
        stringer.endObject();
        } catch (JSONException e) {
            e.printStackTrace();
            return null;
        }
        return stringer.toString();
    }

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        out.close();
    }


    @Override
    public String toJSONString() {
        JSONStringer stringer = new JSONStringer();
        try {
            stringer.object();
            this.toJSONString(stringer);
            stringer.endObject();
        } catch (JSONException e) {
            e.printStackTrace();
            System.exit(-1);
        }
        return stringer.toString();
    }

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        out.close();
    }


    @Override
    public String toJSONString() {
        JSONStringer stringer = new JSONStringer();
        try {
            stringer.object();
            this.toJSONString(stringer);
            stringer.endObject();
        } catch (JSONException e) {
            e.printStackTrace();
            System.exit(-1);
        }
        return stringer.toString();
    }

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 *
 */
public final class JSONUtils {


    public static String buildJSON(Map<String, Object> params) {
        final JSONStringer stringer = new JSONStringer();
        stringer.object();


        for (Map.Entry<String, Object> param : params.entrySet()) {
            if (param.getKey() != null && !"".equals(param.getKey()) && param.getValue() != null && !""
                .equals(param.getValue())) {
                stringer.key(param.getKey()).value(param.getValue());
            }
        }


        return stringer.endObject().toString();
    }

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  @GET
  @Produces(MediaType.APPLICATION_JSON)
  public String getJSON() {
    String result = null;
    try {
      result = new JSONStringer()
          .object()
          .key("types")
          .value(new JSONArray(_valueRequirementNames))
          .endObject()
          .toString();

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  protected String typesJSONResponse(final Collection<ComputationTargetType> types) {
    final List<ComputationTargetType> sorted = new ArrayList<ComputationTargetType>(types);
    Collections.sort(sorted, SORT_ORDER);
    try {
      final JSONWriter response = new JSONStringer().object().key("types").array();
      for (ComputationTargetType type : sorted) {
        response.object().key("label").value(type.getName()).key("value").value(type.toString()).endObject();
      }
      return response.endArray().endObject().toString();
    } catch (JSONException e) {

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