### Question:
BinaryRow extends BinaryFormat implements BaseRow { @Override public int hashCode() { return SegmentsUtil.hashByWords(segments, offset, sizeInBytes); } BinaryRow(int arity); static int calculateBitSetWidthInBytes(int arity); static int calculateFixPartSizeInBytes(int arity); static boolean isInFixedLengthPart(LogicalType type); static boolean isMutable(LogicalType type); int getFixedLengthPartSize(); @Override int getArity(); @Override byte getHeader(); @Override void setHeader(byte header); void setTotalSize(int sizeInBytes); @Override boolean isNullAt(int pos); @Override void setNullAt(int i); @Override void setInt(int pos, int value); @Override void setLong(int pos, long value); @Override void setDouble(int pos, double value); @Override void setDecimal(int pos, Decimal value, int precision); @Override void setBoolean(int pos, boolean value); @Override void setShort(int pos, short value); @Override void setByte(int pos, byte value); @Override void setFloat(int pos, float value); @Override boolean getBoolean(int pos); @Override byte getByte(int pos); @Override short getShort(int pos); @Override int getInt(int pos); @Override long getLong(int pos); @Override float getFloat(int pos); @Override double getDouble(int pos); @Override BinaryString getString(int pos); @Override Decimal getDecimal(int pos, int precision, int scale); @Override BinaryGeneric<T> getGeneric(int pos); @Override byte[] getBinary(int pos); @Override BaseArray getArray(int pos); @Override BaseMap getMap(int pos); @Override BaseRow getRow(int pos, int numFields); boolean anyNull(); boolean anyNull(int[] fields); BinaryRow copy(); BinaryRow copy(BinaryRow reuse); void clear(); @Override int hashCode(); String toOriginString(LogicalType... types); static String toOriginString(BaseRow row, LogicalType[] types); boolean equalsWithoutHeader(BaseRow o); static final boolean LITTLE_ENDIAN; static final int HEADER_SIZE_IN_BITS; }### Answer:
@Test public void testZeroOutPaddingGeneric() { GenericTypeInfo<MyObj> info = new GenericTypeInfo<>(MyObj.class); TypeSerializer<MyObj> genericSerializer = info.createSerializer(new ExecutionConfig()); Random random = new Random(); byte[] bytes = new byte[1024]; BinaryRow row = new BinaryRow(1); BinaryRowWriter writer = new BinaryRowWriter(row); writer.reset(); random.nextBytes(bytes); writer.writeBinary(0, bytes); writer.reset(); writer.writeGeneric(0, new BinaryGeneric<>(new MyObj(0, 1), genericSerializer)); writer.complete(); int hash1 = row.hashCode(); writer.reset(); random.nextBytes(bytes); writer.writeBinary(0, bytes); writer.reset(); writer.writeGeneric(0, new BinaryGeneric<>(new MyObj(0, 1), genericSerializer)); writer.complete(); int hash2 = row.hashCode(); assertEquals(hash1, hash2); }
@Test public void testZeroOutPaddingString() { Random random = new Random(); byte[] bytes = new byte[1024]; BinaryRow row = new BinaryRow(1); BinaryRowWriter writer = new BinaryRowWriter(row); writer.reset(); random.nextBytes(bytes); writer.writeBinary(0, bytes); writer.reset(); writer.writeString(0, BinaryString.fromString("wahahah")); writer.complete(); int hash1 = row.hashCode(); writer.reset(); random.nextBytes(bytes); writer.writeBinary(0, bytes); writer.reset(); writer.writeString(0, BinaryString.fromString("wahahah")); writer.complete(); int hash2 = row.hashCode(); assertEquals(hash1, hash2); }