ByteBuffer POC [DO NOT MERGE] #1526
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| @Test | ||
| public void deserialization_from_byte_buffer() throws Exception { | ||
| String json = loadJsonFixture(DIRECTIONS_V5_PRECISION6_FIXTURE); | ||
| ByteBuffer buffer = ByteBuffer.wrap(json.getBytes(StandardCharsets.UTF_8)); |
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I just want to point out that you can only pass java.nio.DirectBuffer (created with java.nio.ByteBuffer.allocateDirect, or the JNI NewDirectByteBuffer function) to native using the DataRef type (I know it's unrelated to this test, I just want to make sure there is no surprise). ByteBuffer.wrap doesn't allocate memory on native heap so native can't access the memory region directly. Otherwise, code from DirectionsResponse looks good to me.
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Thank you for the clarification. I updated the test to use direct buffer to avoid confusion.
| @@ -146,6 +154,49 @@ public static DirectionsResponse fromJson(@NonNull String json) { | |||
| return gson.create().fromJson(json, DirectionsResponse.class).toBuilder().build(); | |||
| } | |||
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| public static DirectionsResponse fromJson(@NonNull ByteBuffer json, Charset charsets) { | |||
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Thinking about ways we could access specific parts of the DirectionsResponse, rather than deserializing the entire object. The DirectionsResponse can be large, but if we could stream the components.
For example, could we stream the geometry? #1518
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@kmadsen , I'm not sure if I understood this idea correctly. Is the idea about keeping raw json response in memory and deserialise only during first access?
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Closed in favour of #1545 |
It's an example of how mapbox java can deserialise direction response model from buffer allocated in native memory copying data by small chunks, in our case by 1024 bytes which happens inside GSON library.