public Common.Signature toProto() {
Common.Signature.Builder builder = Common.Signature.newBuilder();
if (null != sql) {
builder.setSql(sql);
}
if (null != cursorFactory) {
builder.setCursorFactory(cursorFactory.toProto());
}
if (null != columns) {
for (ColumnMetaData column : columns) {
builder.addColumns(column.toProto());
}
}
if (null != parameters) {
for (AvaticaParameter parameter : parameters) {
builder.addParameters(parameter.toProto());
}
}
return builder.build();
}
public static Signature fromProto(Common.Signature protoSignature) {
List<ColumnMetaData> metadata = new ArrayList<>(protoSignature.getColumnsCount());
for (Common.ColumnMetaData protoMetadata : protoSignature.getColumnsList()) {
metadata.add(ColumnMetaData.fromProto(protoMetadata));
}
List<AvaticaParameter> parameters = new ArrayList<>(protoSignature.getParametersCount());
for (Common.AvaticaParameter protoParam : protoSignature.getParametersList()) {
parameters.add(AvaticaParameter.fromProto(protoParam));
}
final Descriptor desc = protoSignature.getDescriptorForType();
String sql = null;
if (ProtobufService.hasField(protoSignature, desc, Common.Signature.SQL_FIELD_NUMBER)) {
sql = protoSignature.getSql();
}
CursorFactory cursorFactory = null;
if (ProtobufService.hasField(
protoSignature, desc, Common.Signature.CURSOR_FACTORY_FIELD_NUMBER)) {
cursorFactory = CursorFactory.fromProto(protoSignature.getCursorFactory());
}
return Signature.create(metadata, sql, parameters, cursorFactory);
}