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

[Ahmed Hamdallah]

hello,

Regarding java 14 new feature of new Foreign-Memory API. it is actually bit complicated for me regarding classes SequenceLayout & VarHandle.

since it is a new feature, i could not find many example to access MemorySegment data.

my question, using MemorySegment & VarHandle classes how to read/write array of bytes at one shot. not byte by byte.

Yes, I am aware of asByteBuffer(). but as per documentation the main reason for this new Memory Segment access is to avoid ByteBuffer class.

this is example

byte[] bytesArrayString = "Hello MemorySegment".getBytes();

    MemoryAddress address = MemorySegment.allocateNative(4096).baseAddress();

    SequenceLayout bytes = MemoryLayout.ofSequence(bytesArrayString.length, MemoryLayouts.JAVA_BYTE);

    VarHandle byteHandle = bytes.varHandle(byte.class, MemoryLayout.PathElement.sequenceElement());

    byteHandle.set(address.addOffset(0), (byte[]) bytesArrayString);

    byte value[] = (byte[]) byteHandle.get(address.addOffset(0));

    System.out.println("Memory Value: " + value.length + new String(value));

error

java.lang.invoke.WrongMethodTypeException: cannot convert MethodHandle(VarHandle,MemoryAddressProxy,long,byte)void to (VarHandle,MemoryAddress,long,byte[])void
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