private void writeValue(FieldReader reader) throws JsonGenerationException, IOException {
final DataMode m = reader.getType().getMode();
final MinorType mt = reader.getType().getMinorType();
switch (m) {
case OPTIONAL:
case REQUIRED:
switch (mt) {
case FLOAT4:
gen.writeFloat(reader);
break;
case FLOAT8:
gen.writeDouble(reader);
break;
case INT:
gen.writeInt(reader);
break;
case SMALLINT:
gen.writeSmallInt(reader);
break;
case TINYINT:
gen.writeTinyInt(reader);
break;
case BIGINT:
gen.writeBigInt(reader);
break;
case BIT:
gen.writeBoolean(reader);
break;
case DATE:
gen.writeDate(reader);
break;
case TIME:
gen.writeTime(reader);
break;
case TIMESTAMP:
gen.writeTimestamp(reader);
break;
case INTERVALYEAR:
case INTERVALDAY:
case INTERVAL:
gen.writeInterval(reader);
break;
case DECIMAL28DENSE:
case DECIMAL28SPARSE:
case DECIMAL38DENSE:
case DECIMAL38SPARSE:
case DECIMAL9:
case DECIMAL18:
gen.writeDecimal(reader);
break;
case LIST:
// this is a pseudo class, doesn't actually contain the real reader so we have to drop
// down.
writeValue(reader.reader());
break;
case MAP:
gen.writeStartObject();
if (reader.isSet()) {
for (String name : reader) {
FieldReader childReader = reader.reader(name);
if (childReader.isSet()) {
gen.writeFieldName(name);
writeValue(childReader);
}
}
}
gen.writeEndObject();
break;
case NULL:
gen.writeUntypedNull();
break;
case VAR16CHAR:
gen.writeVar16Char(reader);
break;
case VARBINARY:
gen.writeBinary(reader);
break;
case VARCHAR:
gen.writeVarChar(reader);
break;
}
break;
case REPEATED:
gen.writeStartArray();
switch (mt) {
case FLOAT4:
for (int i = 0; i < reader.size(); i++) {
gen.writeFloat(i, reader);
}
break;
case FLOAT8:
for (int i = 0; i < reader.size(); i++) {
gen.writeDouble(i, reader);
}
break;
case INT:
for (int i = 0; i < reader.size(); i++) {
gen.writeInt(i, reader);
}
break;
case SMALLINT:
for (int i = 0; i < reader.size(); i++) {
gen.writeSmallInt(i, reader);
}
break;
case TINYINT:
for (int i = 0; i < reader.size(); i++) {
gen.writeTinyInt(i, reader);
}
break;
case BIGINT:
for (int i = 0; i < reader.size(); i++) {
gen.writeBigInt(i, reader);
}
break;
case BIT:
for (int i = 0; i < reader.size(); i++) {
gen.writeBoolean(i, reader);
}
break;
case DATE:
for (int i = 0; i < reader.size(); i++) {
gen.writeDate(i, reader);
}
break;
case TIME:
for (int i = 0; i < reader.size(); i++) {
gen.writeTime(i, reader);
}
break;
case TIMESTAMP:
for (int i = 0; i < reader.size(); i++) {
gen.writeTimestamp(i, reader);
}
break;
case INTERVALYEAR:
case INTERVALDAY:
case INTERVAL:
for (int i = 0; i < reader.size(); i++) {
gen.writeInterval(i, reader);
}
break;
case DECIMAL28DENSE:
case DECIMAL28SPARSE:
case DECIMAL38DENSE:
case DECIMAL38SPARSE:
case DECIMAL9:
case DECIMAL18:
for (int i = 0; i < reader.size(); i++) {
gen.writeDecimal(i, reader);
}
break;
case LIST:
for (int i = 0; i < reader.size(); i++) {
while (reader.next()) {
writeValue(reader.reader());
}
}
break;
case MAP:
while (reader.next()) {
gen.writeStartObject();
for (String name : reader) {
FieldReader mapField = reader.reader(name);
if (mapField.isSet()) {
gen.writeFieldName(name);
writeValue(mapField);
}
}
gen.writeEndObject();
}
break;
case NULL:
break;
case VAR16CHAR:
for (int i = 0; i < reader.size(); i++) {
gen.writeVar16Char(i, reader);
}
break;
case VARBINARY:
for (int i = 0; i < reader.size(); i++) {
gen.writeBinary(i, reader);
}
break;
case VARCHAR:
for (int i = 0; i < reader.size(); i++) {
gen.writeVarChar(i, reader);
}
break;
default:
throw new IllegalStateException(String.format("Unable to handle type %s.", mt));
}
gen.writeEndArray();
break;
}
}
/**
* Pretty-prints and formats the JSON payload.
*
* <p>This method calls the JsonLexer to parser the output of the builder, so this may not be an
* optimal method to call, and should be used mainly for debugging purpose for a human-readable
* output of the JSON content.
*
* @return a pretty printed JSON output
*/
public String toPrettyString() {
return JsonOutput.prettyPrint(toString());
}
public void write(FieldReader reader) throws JsonGenerationException, IOException {
writeValue(reader);
gen.flush();
}
/**
* Serializes the internal data structure built with the builder to a conformant JSON payload
* string
*
* <p>Example:
*
* <pre><code>
* def json = new JsonBuilder()
* json { temperature 37 }
*
* assert json.toString() == '{"temperature":37}'
* </code></pre>
*
* @return a JSON output
*/
public String toString() {
return JsonOutput.toJson(content);
}