public static Frame fromProto(Common.Frame proto) {
List<Object> parsedRows = new ArrayList<>(proto.getRowsCount());
for (Common.Row protoRow : proto.getRowsList()) {
ArrayList<Object> row = new ArrayList<>(protoRow.getValueCount());
for (Common.TypedValue protoElement : protoRow.getValueList()) {
Object element;
// TODO Should these be primitives or Objects?
switch (protoElement.getType()) {
case BYTE:
element = Long.valueOf(protoElement.getNumberValue()).byteValue();
break;
case SHORT:
element = Long.valueOf(protoElement.getNumberValue()).shortValue();
break;
case INTEGER:
element = Long.valueOf(protoElement.getNumberValue()).intValue();
break;
case LONG:
element = protoElement.getNumberValue();
break;
case FLOAT:
element = Long.valueOf(protoElement.getNumberValue()).floatValue();
break;
case DOUBLE:
element = Double.valueOf(protoElement.getDoubleValue());
break;
case NUMBER:
// TODO more cases here to expand on? BigInteger?
element = BigDecimal.valueOf(protoElement.getDoubleValue());
break;
case STRING:
element = protoElement.getStringValue();
break;
case CHARACTER:
// A single character in the string
element = protoElement.getStringValue().charAt(0);
break;
case BYTE_STRING:
element = protoElement.getBytesValues().toByteArray();
break;
case BOOLEAN:
element = protoElement.getBoolValue();
break;
case NULL:
element = null;
break;
default:
throw new RuntimeException("Unhandled type: " + protoElement.getType());
}
row.add(element);
}
parsedRows.add(row);
}
return new Frame(proto.getOffset(), proto.getDone(), parsedRows);
}
public Common.Frame toProto() {
Common.Frame.Builder builder = Common.Frame.newBuilder();
builder.setDone(done).setOffset(offset);
for (Object row : this.rows) {
if (null == row) {
// Does this need to be persisted for some reason?
continue;
}
if (row instanceof Object[]) {
final Common.Row.Builder rowBuilder = Common.Row.newBuilder();
for (Object element : (Object[]) row) {
final Common.TypedValue.Builder valueBuilder = Common.TypedValue.newBuilder();
// Numbers
if (element instanceof Byte) {
valueBuilder.setType(Common.Rep.BYTE).setNumberValue(((Byte) element).longValue());
} else if (element instanceof Short) {
valueBuilder.setType(Common.Rep.SHORT).setNumberValue(((Short) element).longValue());
} else if (element instanceof Integer) {
valueBuilder
.setType(Common.Rep.INTEGER)
.setNumberValue(((Integer) element).longValue());
} else if (element instanceof Long) {
valueBuilder.setType(Common.Rep.LONG).setNumberValue((Long) element);
} else if (element instanceof Double) {
valueBuilder
.setType(Common.Rep.DOUBLE)
.setDoubleValue(((Double) element).doubleValue());
} else if (element instanceof Float) {
valueBuilder.setType(Common.Rep.FLOAT).setNumberValue(((Float) element).longValue());
} else if (element instanceof BigDecimal) {
valueBuilder
.setType(Common.Rep.NUMBER)
.setDoubleValue(((BigDecimal) element).doubleValue());
// Strings
} else if (element instanceof String) {
valueBuilder.setType(Common.Rep.STRING).setStringValue((String) element);
} else if (element instanceof Character) {
valueBuilder
.setType(Common.Rep.CHARACTER)
.setStringValue(((Character) element).toString());
// Bytes
} else if (element instanceof byte[]) {
valueBuilder
.setType(Common.Rep.BYTE_STRING)
.setBytesValues(ByteString.copyFrom((byte[]) element));
// Boolean
} else if (element instanceof Boolean) {
valueBuilder.setType(Common.Rep.BOOLEAN).setBoolValue((boolean) element);
} else if (null == element) {
valueBuilder.setType(Common.Rep.NULL);
// Unhandled
} else {
throw new RuntimeException("Unhandled type in Frame: " + element.getClass());
}
// Add value to row
rowBuilder.addValue(valueBuilder.build());
}
// Collect all rows
builder.addRows(rowBuilder.build());
} else {
// Can a "row" be a primitive? A struct? Only an Array?
throw new RuntimeException("Only arrays are supported");
}
}
return builder.build();
}