Exception when pass empty list to the smart contract

[Hirama]

Contract with function addAddresses(address point, address[] list) external;

When I try to execute contract method.

public RemoteCall<TransactionReceipt> addAddresses(String point, List<String> list) {
        final Function function = new Function(
                FUNC_ADDADDRESSES, 
                Arrays.<Type>asList(new Address(point),
                new DynamicArray<Address>(
                        org.web3j.abi.Utils.typeMap(list, Address.class))),
                Collections.<TypeReference<?>>emptyList());
        return executeRemoteCallTransaction(function);
    }

I got exception java.lang.IndexOutOfBoundsException: Index: 0, Size: 0

Problem is in this part of the code when trying to get the type from the first element of the empty list.

[MarkOSullivan94]

@Hirama curious what you are wanting done here

[iikirilov]

Considering the Arrays.sol contract in web3j-codegen there is a method:

    function dynamicReverse(uint[] input) public pure returns (uint[] result) {
        uint length = input.length;
        result = new uint[](length);

        for (uint i = 0; i < length; i++) {
            result[i] = input[length - (i + 1)];
        }
        return result;
    }

The web3j generator will generate:

    public RemoteCall<List> dynamicReverse(List<BigInteger> input) {
        final Function function = new Function(FUNC_DYNAMICREVERSE, 
                java.util.Arrays.<Type>asList(new org.web3j.abi.datatypes.DynamicArray<org.web3j.abi.datatypes.generated.Uint256>(
                        org.web3j.abi.Utils.typeMap(input, org.web3j.abi.datatypes.generated.Uint256.class))), 
                java.util.Arrays.<TypeReference<?>>asList(new TypeReference<DynamicArray<Uint256>>() {}));
        return new RemoteCall<List>(
                new Callable<List>() {
                    @Override
                    @SuppressWarnings("unchecked")
                    public List call() throws Exception {
                        List<Type> result = (List<Type>) executeCallSingleValueReturn(function, List.class);
                        return convertToNative(result);
                    }
                });
    }

If one was to call arrays.dynamicReverse(new Arraylist<BigInteger>()) web3j will complain.
The DynamicArray constructor is called:

    public DynamicArray(List<T> values) {
        super(values.get(0).getTypeAsString() + "[]", values);
    }

As the list is empty we should get the type of the list via reflection?