java 14 and JEP 370: Foreign-Memory Access API-- Array Of Bytes.

[Ahmed Hamdallah]

Thank you Maurizio & Henry,

Yes I realized the solution to copy bulk array using MemoryAddress:copy.

It also works via versa. Read + write.

MemoryAddress.copy(MemorySegment.ofArray(bytesArrayString).baseAddress(), address, bytesArrayString.length);  // write 
MemoryAddress.copy(address, MemorySegment.ofArray(bytesArrayString2).baseAddress(), bytesArrayString.length); // read

Regards,

On 25/03/2020, 8:33 PM, "panama-dev on behalf of Maurizio Cimadamore" <panama-dev-bounces at openjdk.java.net on behalf of maurizio.cimadamore at oracle.com> wrote:

    Yeah - I now realize I did not reply to the original question.
    
    The way to go to do bulk access is to use the MemoryAddress::copy API, 
    as shown in the email from Henry.
    
    That is:
    
    1) create an on-heap segment backed by a byte[]
    2) copy portions of the off-heap segment into the on-heap segment using 
    MemoryAddress:copy
    
    Maurizio
    
    On 25/03/2020 15:58, Ty Young wrote:
    > They seem to want a method that accepts an array of bytes(byte[]) 
    > which is then put into memory and then be able to get it back without 
    > accessing individual offset locations or using ByteBuffer.
    >
    >
    > There is no such thing for setting AFAIK. The MemorySegment.ofArray() 
    > methods just create a MemorySegment that can hold an array of the 
    > given array's size AFAIK.
    >
    >
    > There is a method for getting the array in bulk though: 
    > <MemorySegment>.toByteArray().
    >
    >