Examples of org.codehaus.jettison.json.JSONWriter

org.codehaus.jettison.json.JSONWriter

JSONWriter 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 JSONWriter can produce one JSON text.

A JSONWriter 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 a cascade style. For example,

 new JSONWriter(myWriter) .object() .key("JSON") .value("Hello, World!") .endObject();

which writes

 {"JSON":"Hello, World!"}

The first method called must be array or object. There are no methods for adding commas or colons. JSONWriter 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 2

   * Gets JSON string from a collection of goods or categories
   */
  private String getItemsJson(Iterable<? extends Jsonable<?>> items)
      throws JSONException {
    JSONStringer st = new JSONStringer();
    JSONWriter writer = st.array();
    for(Jsonable<?> i: items) {
      writer = writer.value(new JSONObject(i.toJson()));
    }
    writer = writer.endArray();
    
    return writer.toString();
  }

    }
  }


  public String toJson() {
    try {
      JSONWriter writer = new JSONStringer().object();
      if(key != null) {
        writer = writer.key(Jsonable.KEY_STR).value(KeyFactory.keyToString(key));
      }
      JSONWriter value = writer
      .key(Category.NAME).value(getName())
      .key(Category.DESCRIPTION).value(getDescription().getValue())
      .key(Category.PARENT_KEY_STR).value(getParentKeyStr())
      .key(Category.IMAGE_BLOB_KEY).value(getImageBlobKey());
      
      value = addAdditionalPropertiesToJson(value);
      String string = value.endObject().toString();
      
      return string;
    } catch (JSONException e) {
      throw new RuntimeException(e);
    }

    }


    @Override
    public void encode(Object value, OutputStream os) throws Exception {
        OutputStreamWriter writer = new OutputStreamWriter(os);
        JSONWriter w = new JSONWriter(writer);
        
        encode((Map) value, w);
        writer.flush();
    }

Examples of org.codehaus.jettison.json.JSONWriter

Related Classes of org.codehaus.jettison.json.JSONWriter