Difference between revisions of "TypeSystems"
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| − | We want the type system to be serialization agnostic so we can support different backends. | + | We want the type system to be serialization agnostic so we can support different backends (eg Thrift, Protocol Buffers, MXP, LLSD,...). |
| − | Our current implementation ideas revolve around starting from the serialization format specified in protocol buffers. | + | Our current implementation ideas revolve around starting from the serialization format specified in protocol buffers and building upon them. |
| − | + | You can checkout our implementation at git://github.com/danielrh/pbj.git (github homepage at http://github.com/danielrh/pbj ) | |
| + | |||
| + | |||
| + | Starting with a protocol buffers implementation, we have the following types | ||
{| border="1" cellpadding="0" | {| border="1" cellpadding="0" | ||
| Line 36: | Line 39: | ||
|- | |- | ||
|bytes | |bytes | ||
| + | |} | ||
There are some additional types that would be nice to add: | There are some additional types that would be nice to add: | ||
| + | |||
{| border="1" cellpadding="0" | {| border="1" cellpadding="0" | ||
| − | !width="50"|Name||Basic Types Built From | + | !width="50"|Name||Basic Types Built From || Restrictions |
| + | |- | ||
| + | |Fixed Length Byte Array || bytes || length must be equal to constraint | ||
| + | |- | ||
| + | |UUID || Fixed Length Byte Array [16] || length must be equal to constraint | ||
|- | |- | ||
| − | |Fixed Length | + | |SHA256 || Fixed Length Byte Array [32] || length must be equal to constraint (should this changed to a generic Hash type?) |
|- | |- | ||
| − | | | + | |URI || Variable Length Array of Strings || must follow URI guidelines in appropriate RFC |
|- | |- | ||
| − | | | + | |Time || fixed64 || microseconds from 1 Jan 1970 UTC |
|- | |- | ||
| − | | | + | |Duration || fixed64 || nanoseconds |
|- | |- | ||
| − | | | + | |flags (enum where each enumerant can be toggled) || fixed32 or fixed64 depending on the number of enumerants |
|- | |- | ||
| − | | | + | |Vector3f || message consisting of 3 reqiured floats || |
|- | |- | ||
| − | | | + | |Normal3f || message consisting of 3 reqiured floats || sum of squares must be nearly 1 |
|- | |- | ||
| − | |Vector2f | + | |Vector2f || message consisting of 2 reqiured floats || |
|- | |- | ||
| − | |Vector3d | + | |Vector3d || message consisting of 3 reqiured doubles || |
|- | |- | ||
| − | |Vector2d | + | |Vector2d || message consisting of 2 reqiured floats || |
|- | |- | ||
|Quaternion | |Quaternion | ||
Latest revision as of 22:46, 14 April 2009
We want the type system to be serialization agnostic so we can support different backends (eg Thrift, Protocol Buffers, MXP, LLSD,...).
Our current implementation ideas revolve around starting from the serialization format specified in protocol buffers and building upon them. You can checkout our implementation at git://github.com/danielrh/pbj.git (github homepage at http://github.com/danielrh/pbj )
Starting with a protocol buffers implementation, we have the following types
| Name |
|---|
| double |
| float |
| int32 |
| int64 |
| uint32 |
| uint64 |
| sint32 |
| sint64 |
| fixed32 |
| fixed64 |
| sfixed32 |
| sfixed64 |
| bool |
| string |
| bytes |
There are some additional types that would be nice to add:
| Name | Basic Types Built From | Restrictions |
|---|---|---|
| Fixed Length Byte Array | bytes | length must be equal to constraint |
| UUID | Fixed Length Byte Array [16] | length must be equal to constraint |
| SHA256 | Fixed Length Byte Array [32] | length must be equal to constraint (should this changed to a generic Hash type?) |
| URI | Variable Length Array of Strings | must follow URI guidelines in appropriate RFC |
| Time | fixed64 | microseconds from 1 Jan 1970 UTC |
| Duration | fixed64 | nanoseconds |
| flags (enum where each enumerant can be toggled) | fixed32 or fixed64 depending on the number of enumerants | |
| Vector3f | message consisting of 3 reqiured floats | |
| Normal3f | message consisting of 3 reqiured floats | sum of squares must be nearly 1 |
| Vector2f | message consisting of 2 reqiured floats | |
| Vector3d | message consisting of 3 reqiured doubles | |
| Vector2d | message consisting of 2 reqiured floats | |
| Quaternion | ||
| Angle (0-2pi) | ||
| Bounding box/sphere (NULL defined) |