private static void assertBytesStreams(Slice slice, int index) throws Exception {
// fill slice with FF
slice.fill((byte) 0xFF);
byte[] value = new byte[slice.length()];
Arrays.fill(value, (byte) 0xFF);
assertEquals(slice.getBytes(), value);
// set and get the value
value = new byte[(slice.length() - index) / 2];
for (int i = 0; i < value.length; i++) {
value[i] = (byte) i;
}
slice.setBytes(index, new ByteArrayInputStream(value), value.length);
assertEquals(slice.getBytes(index, value.length), value);
ByteArrayOutputStream out = new ByteArrayOutputStream();
slice.getBytes(index, out, value.length);
assertEquals(slice.getBytes(index, value.length), out.toByteArray());
for (int length = 0; length < value.length; length++) {
slice.fill((byte) 0xFF);
slice.setBytes(index, new ByteArrayInputStream(value), length);
assertEquals(slice.getBytes(index, length), Arrays.copyOf(value, length));
out = new ByteArrayOutputStream();
slice.getBytes(index, out, length);
assertEquals(slice.getBytes(index, length), out.toByteArray());
}
}
private void assertBytesSlice(Slice slice, int index) {
// fill slice with FF
slice.fill((byte) 0xFF);
// compare to self slice
assertEquals(slice.slice(0, slice.length()), slice);
Slice value = allocate(slice.length());
slice.getBytes(0, value, 0, slice.length());
assertEquals(value, slice);
// set and get the value
value = allocate((slice.length() - index) / 2);
for (int i = 0; i < value.length(); i++) {
value.setByte(i, i);
}
// check by slicing out the region
slice.setBytes(index, value);
assertEquals(value, slice.slice(index, value.length()));
// check by getting out the region
Slice tempValue = allocate(value.length());
slice.getBytes(index, tempValue, 0, tempValue.length());
assertEquals(tempValue, slice.slice(index, tempValue.length()));
assertTrue(tempValue.equals(0, tempValue.length(), slice, index, tempValue.length()));
for (int length = 0; length < value.length(); length++) {
slice.fill((byte) 0xFF);
slice.setBytes(index, value, 0, length);
// check by slicing out the region
assertEquals(value.slice(0, length), slice.slice(index, length));
assertTrue(value.equals(0, length, slice, index, length));
// check by getting out the region
tempValue = allocate(length);
slice.getBytes(index, tempValue);
assertEquals(tempValue, slice.slice(index, length));
assertTrue(tempValue.equals(0, length, slice, index, length));
}
}
@Test
public void testMemoryMappedReads() throws IOException {
Path path = Files.createTempFile("longs", null);
ImmutableList<Long> values = createRandomLongs(20000);
Slice output = allocate(values.size() * Longs.BYTES);
for (int i = 0; i < values.size(); i++) {
output.setLong(i * Longs.BYTES, values.get(i));
}
Files.write(path, output.getBytes());
Slice slice = Slices.mapFileReadOnly(path.toFile());
for (int i = 0; i < values.size(); i++) {
long actual = slice.getLong(i * Longs.BYTES);
long expected = values.get(i);
assertEquals(actual, expected);
}
assertEquals(slice.getBytes(), output.getBytes());
}
private static void assertBytesArray(Slice slice, int index) {
// fill slice with FF
slice.fill((byte) 0xFF);
byte[] value = new byte[slice.length()];
Arrays.fill(value, (byte) 0xFF);
assertEquals(slice.getBytes(), value);
// set and get the value
value = new byte[(slice.length() - index) / 2];
for (int i = 0; i < value.length; i++) {
value[i] = (byte) i;
}
slice.setBytes(index, value);
assertEquals(slice.getBytes(index, value.length), value);
for (int length = 0; length < value.length; length++) {
slice.fill((byte) 0xFF);
slice.setBytes(index, value, 0, length);
assertEquals(slice.getBytes(index, length), Arrays.copyOf(value, length));
}
}
@Test
public void testReading() {
assertEquals(ByteOrder.nativeOrder(), ByteOrder.LITTLE_ENDIAN);
byte[] bytes = new byte[10];
Slice slice = Slices.wrappedBuffer(bytes);
slice.setInt(0, 0xDEADBEEF);
slice.setInt(4, 0xCAFEBABE);
// little endian memory layout: EF BE AD DE BE BA FE CA 00 00
assertEquals(
slice.getBytes(),
new byte[] {
(byte) 0xEF,
(byte) 0xBE,
(byte) 0xAD,
(byte) 0xDE,
(byte) 0xBE,
(byte) 0xBA,
(byte) 0xFE,
(byte) 0xCA,
0x00,
0x00
});
assertEquals(ByteArrays.getShort(bytes, 0), (short) 0xBEEF);
assertEquals(ByteArrays.getShort(bytes, 1), (short) 0xADBE);
assertEquals(ByteArrays.getShort(bytes, 2), (short) 0xDEAD);
assertEquals(ByteArrays.getShort(bytes, 3), (short) 0xBEDE);
assertEquals(ByteArrays.getInt(bytes, 0), 0xDEADBEEF);
assertEquals(ByteArrays.getInt(bytes, 1), 0xBEDEADBE);
assertEquals(ByteArrays.getInt(bytes, 2), 0xBABEDEAD);
assertEquals(ByteArrays.getInt(bytes, 3), 0xFEBABEDE);
assertEquals(ByteArrays.getInt(bytes, 4), 0xCAFEBABE);
assertEquals(ByteArrays.getLong(bytes, 0), 0xCAFEBABE_DEADBEEFL);
assertEquals(ByteArrays.getLong(bytes, 1), 0x00CAFEBA_BEDEADBEL);
assertEquals(ByteArrays.getLong(bytes, 2), 0x0000CAFE_BABEDEADL);
assertEquals(ByteArrays.getFloat(bytes, 0), intBitsToFloat(0xDEADBEEF));
assertEquals(ByteArrays.getFloat(bytes, 1), intBitsToFloat(0xBEDEADBE));
assertEquals(ByteArrays.getFloat(bytes, 2), intBitsToFloat(0xBABEDEAD));
assertEquals(ByteArrays.getFloat(bytes, 3), intBitsToFloat(0xFEBABEDE));
assertEquals(ByteArrays.getFloat(bytes, 4), intBitsToFloat(0xCAFEBABE));
assertEquals(ByteArrays.getDouble(bytes, 0), longBitsToDouble(0xCAFEBABE_DEADBEEFL));
assertEquals(ByteArrays.getDouble(bytes, 1), longBitsToDouble(0x00CAFEBA_BEDEADBEL));
assertEquals(ByteArrays.getDouble(bytes, 2), longBitsToDouble(0x0000CAFE_BABEDEADL));
}