def test_jvm_buffer_released(root_allocator):
import jpype.imports # noqa
from java.lang import IllegalArgumentException
jvm_buffer = root_allocator.buffer(8)
jvm_buffer.release()
with pytest.raises(IllegalArgumentException):
pa_jvm.jvm_buffer(jvm_buffer)
def test_jvm_buffer(root_allocator):
# Create a buffer
jvm_buffer = root_allocator.buffer(8)
for i in range(8):
jvm_buffer.setByte(i, 8 - i)
# Convert to Python
buf = pa_jvm.jvm_buffer(jvm_buffer)
# Check its content
assert buf.to_pybytes() == b'\x08\x07\x06\x05\x04\x03\x02\x01'
def test_jvm_buffer(root_allocator):
# Create a buffer
jvm_buffer = root_allocator.buffer(8)
for i in range(8):
jvm_buffer.setByte(i, 8 - i)
# Convert to Python
buf = pa_jvm.jvm_buffer(jvm_buffer)
# Check its content
assert buf.to_pybytes() == b'\x08\x07\x06\x05\x04\x03\x02\x01'
def test_jvm_buffer(root_allocator):
# Create a Java buffer
jvm_buffer = root_allocator.buffer(8)
for i in range(8):
jvm_buffer.setByte(i, 8 - i)
orig_refcnt = jvm_buffer.refCnt()
# Convert to Python
buf = pa_jvm.jvm_buffer(jvm_buffer)
# Check its content
assert buf.to_pybytes() == b'\x08\x07\x06\x05\x04\x03\x02\x01'
# Check Java buffer lifetime is tied to PyArrow buffer lifetime
assert jvm_buffer.refCnt() == orig_refcnt + 1
del buf
assert jvm_buffer.refCnt() == orig_refcnt