private void write(JsonGenerator jg, TwitterEntry entry) throws IOException {
jg.writeStartObject();
// can either do "jg.writeFieldName(...) + jg.writeNumber()", or this:
jg.writeNumberField("id", entry.getId());
jg.writeStringField("text", entry.getText());
jg.writeNumberField("fromUserId", entry.getFromUserId());
jg.writeNumberField("toUserId", entry.getToUserId());
jg.writeStringField("langugeCode", entry.getLanguageCode());
jg.writeEndObject();
jg.close();
}
private TwitterEntry read(JsonParser jp) throws IOException {
// First: verify that we got "Json Object":
if (jp.nextToken() != JsonToken.START_OBJECT) {
throw new IOException("Expected data to start with an Object");
}
TwitterEntry result = new TwitterEntry();
// Iterate over object fields:
while (jp.nextToken() != JsonToken.END_OBJECT) {
String fieldName = jp.getCurrentName();
// Let's move to value
jp.nextToken();
if (fieldName.equals("id")) {
result.setId(jp.getLongValue());
} else if (fieldName.equals("text")) {
result.setText(jp.getText());
} else if (fieldName.equals("fromUserId")) {
result.setFromUserId(jp.getIntValue());
} else if (fieldName.equals("toUserId")) {
result.setToUserId(jp.getIntValue());
} else if (fieldName.equals("languageCode")) {
result.setLanguageCode(jp.getText());
} else {
// ignore, or signal error
throw new IOException("Unrecognized field '" + fieldName + "'");
}
}
jp.close(); // important to close both parser and underlying File reader
return result;
}