/**
* Method that can be used to serialize any Java value as a String. Functionally equivalent to
* calling {@link #writeValue(Writer,Object)} with {@link java.io.StringWriter} and constructing
* String, but more efficient.
*
* <p>Note: prior to version 2.1, throws clause included {@link IOException}; 2.1 removed it.
*/
public String writeValueAsString(Object value) throws JsonProcessingException {
// alas, we have to pull the recycler directly here...
SegmentedStringWriter sw = new SegmentedStringWriter(_jsonFactory._getBufferRecycler());
try {
_configAndWriteValue(_jsonFactory.createJsonGenerator(sw), value);
} catch (JsonProcessingException e) { // to support [JACKSON-758]
throw e;
} catch (IOException e) { // shouldn't really happen, but is declared as possibility so:
throw JsonMappingException.fromUnexpectedIOE(e);
}
return sw.getAndClear();
}
/**
* Method that can be used to serialize any Java value as a byte array. Functionally equivalent to
* calling {@link #writeValue(Writer,Object)} with {@link java.io.ByteArrayOutputStream} and
* getting bytes, but more efficient. Encoding used will be UTF-8.
*
* <p>Note: prior to version 2.1, throws clause included {@link IOException}; 2.1 removed it.
*/
public byte[] writeValueAsBytes(Object value) throws JsonProcessingException {
ByteArrayBuilder bb = new ByteArrayBuilder(_jsonFactory._getBufferRecycler());
try {
_configAndWriteValue(_jsonFactory.createJsonGenerator(bb, JsonEncoding.UTF8), value);
} catch (JsonProcessingException e) { // to support [JACKSON-758]
throw e;
} catch (IOException e) { // shouldn't really happen, but is declared as possibility so:
throw JsonMappingException.fromUnexpectedIOE(e);
}
byte[] result = bb.toByteArray();
bb.release();
return result;
}
private void process(File input) throws IOException {
JsonFactory jsonF = new JsonFactory();
JsonParser jp = jsonF.createJsonParser(input);
TwitterEntry entry = read(jp);
// let's write to a file, using UTF-8 encoding (only sensible one)
StringWriter strw = new StringWriter();
JsonGenerator jg = jsonF.createJsonGenerator(strw);
jg.useDefaultPrettyPrinter(); // enable indentation just to make debug/testing easier
// Here we would modify it... for now, will just (re)indent it
write(jg, entry);
System.out.println("Result = [" + strw.toString() + "]");
}
/**
* Method that can be used to serialize any Java value as JSON output, using Writer provided.
*
* <p>Note: method does not close the underlying stream explicitly here; however, {@link
* JsonFactory} this mapper uses may choose to close the stream depending on its settings (by
* default, it will try to close it when {@link JsonGenerator} we construct is closed).
*/
public void writeValue(Writer w, Object value)
throws IOException, JsonGenerationException, JsonMappingException {
_configAndWriteValue(_jsonFactory.createJsonGenerator(w), value);
}
/**
* Method that can be used to serialize any Java value as JSON output, using output stream
* provided (using encoding {@link JsonEncoding#UTF8}).
*
* <p>Note: method does not close the underlying stream explicitly here; however, {@link
* JsonFactory} this mapper uses may choose to close the stream depending on its settings (by
* default, it will try to close it when {@link JsonGenerator} we construct is closed).
*/
public void writeValue(OutputStream out, Object value)
throws IOException, JsonGenerationException, JsonMappingException {
_configAndWriteValue(_jsonFactory.createJsonGenerator(out, JsonEncoding.UTF8), value);
}
/**
* Method that can be used to serialize any Java value as JSON output, written to File provided.
*/
public void writeValue(File resultFile, Object value)
throws IOException, JsonGenerationException, JsonMappingException {
_configAndWriteValue(_jsonFactory.createJsonGenerator(resultFile, JsonEncoding.UTF8), value);
}