public <T extends AbstractDbEntity> String buildJsonStringByTypeAndId(long Id, Class<T> type) {
String result = "";
T DBobject = objectsController.select(type, Id);
if (DBobject == null) {
return result;
}
// may return null
JsonObjectBuilder transJOB;
try {
transJOB = JsonObjectFiller.getJsonObjectBuilderFromClassInstance(DBobject);
} catch (IllegalArgumentException | IllegalAccessException e) {
return result;
}
JsonObject JObject = transJOB.build();
Map<String, Boolean> config = new HashMap<>();
config.put(JsonGenerator.PRETTY_PRINTING, true);
JsonWriterFactory factory = Json.createWriterFactory(config);
// http://blog.eisele.net/2013/02/test-driving-java-api-for-processing.html
StringWriter sw = new StringWriter();
try (JsonWriter jw = factory.createWriter(sw)) {
jw.writeObject(JObject);
}
result = sw.toString();
return result;
}
public String JSonObjectBuilderToString(JsonObjectBuilder transJOB) {
String returnString = "";
JsonObject JObject = transJOB.build();
Map<String, Boolean> config = new HashMap<>();
config.put(JsonGenerator.PRETTY_PRINTING, true);
JsonWriterFactory factory = Json.createWriterFactory(config);
// http://blog.eisele.net/2013/02/test-driving-java-api-for-processing.html
StringWriter sw = new StringWriter();
try (JsonWriter jw = factory.createWriter(sw)) {
jw.writeObject(JObject);
}
returnString = sw.toString();
return returnString;
}
@Override
public JsonResource setContents(JsonStructure structure) {
if (structure == null) throw new IllegalArgumentException("JsonStructure must not be null.");
try {
if (!exists()) {
getParent().mkdirs();
if (!createNewFile()) {
throw new IOException("Failed to create file: " + getUnderlyingResourceObject());
}
}
JsonWriterFactory writerFactory =
Json.createWriterFactory(Collections.singletonMap(JsonGenerator.PRETTY_PRINTING, true));
try (OutputStream out =
getFileOperations().createOutputStream(getUnderlyingResourceObject());
JsonWriter writer = writerFactory.createWriter(out)) {
writer.write(structure);
}
} catch (IOException e) {
throw new ResourceException("Error while setting the Json contents", e);
}
return this;
}