/**
* Creates a JSON string with key as 'message' and value as 'username: message'
*
* @param username the user who sent message
* @param msg the message sent by user
* @return String JSON representation of a single message
*/
private String buildJsonData(String username, String msg) {
JsonObject jsonObject =
Json.createObjectBuilder().add("message", username + ": " + msg).build();
StringWriter sw = new StringWriter();
try (JsonWriter jw = Json.createWriter(sw)) {
jw.write(jsonObject);
}
return sw.toString();
}
/**
* Print JSON.
*
* @param src Source
* @return JSON
* @throws IOException If fails
*/
private static byte[] print(final RsJSON.Source src) throws IOException {
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
final JsonWriter writer = Json.createWriter(baos);
try {
writer.write(src.toJSON());
} finally {
writer.close();
}
return baos.toByteArray();
}
private static void createJsonFile() {
JsonObject model =
Json.createObjectBuilder()
.add("firstName", "Martin")
.add(
"phoneNumbers",
Json.createArrayBuilder()
.add(Json.createObjectBuilder().add("mobile", "1234 56789"))
.add(Json.createObjectBuilder().add("home", "2345 67890")))
.build();
try (JsonWriter jsonWriter =
Json.createWriter(
new FileWriter(
Paths.get(System.getProperty("user.dir"), "target/myData.json").toString()))) {
jsonWriter.write(model);
} catch (IOException e) {
LOGGER.severe("Failed to create file: " + e.getMessage());
}
}
@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;
}