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In Java, allow reusing ByteBuffer in getters (#4633)

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* In Java, allow reusing ByteBuffer in getters

* In Java, allow reusing ByteBuffer in getters

* In Java, allow reusing ByteBuffer in getters
This commit is contained in:
Mitchel
2018-02-23 17:01:05 -05:00
committed by Wouter van Oortmerssen
parent 6e2e909b5c
commit 55ddb84eb2
3 changed files with 39 additions and 0 deletions
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21
java/com/google/flatbuffers/Table.java
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@@ -172,6 +172,27 @@ public class Table {
return bb;
}
/**
* Initialize vector as a ByteBuffer.
*
* This is more efficient than using duplicate, since it doesn't copy the data
* nor allocattes a new {@link ByteBuffer}, creating no garbage to be collected.
*
* @param bb The {@link ByteBuffer} for the array
* @param vector_offset The position of the vector in the byte buffer
* @param elem_size The size of each element in the array
* @return The {@link ByteBuffer} for the array
*/
protected ByteBuffer __vector_in_bytebuffer(ByteBuffer bb, int vector_offset, int elem_size) {
int o = this.__offset(vector_offset);
if (o == 0) return null;
int vectorstart = __vector(o);
bb.rewind();
bb.limit(vectorstart + __vector_len(o) * elem_size);
bb.position(vectorstart);
return bb;
}
/**
* Initialize any Table-derived type to point to the union at the given `offset`.
*