private boolean getParameters()

in Minecraft/src/main/java/com/microsoft/Malmo/MissionHandlers/InventoryCommandsImplementation.java [390:480]
89 lines of code
19 McCabe index (conditional complexity)

    private boolean getParameters(String parameter, List<Object> parsedParams)
    {
        String[] params = parameter.split(" ");
        if (params.length != 2)
        {
            System.out.println("Malformed parameter string (" + parameter + ") - expected <x> <y>");
            return false;   // Error - incorrect number of parameters.
        }
        String[] lhsParams = params[0].split(":");
        String[] rhsParams = params[1].split(":");
        Integer lhsIndex, rhsIndex;
        String lhsName, rhsName, lhsStrIndex, rhsStrIndex;
        boolean checkContainers = false;
        if (lhsParams.length == 2)
        {
            lhsName = lhsParams[0];
            lhsStrIndex = lhsParams[1];
            checkContainers = true;
        }
        else if (lhsParams.length == 1)
        {
            lhsName = "inventory";
            lhsStrIndex = lhsParams[0];
        }
        else
        {
            System.out.println("Malformed parameter string (" + params[0] + ")");
            return false;
        }
        if (rhsParams.length == 2)
        {
            rhsName = rhsParams[0];
            rhsStrIndex = rhsParams[1];
            checkContainers = true;
        }
        else if (rhsParams.length == 1)
        {
            rhsName = "inventory";
            rhsStrIndex = rhsParams[0];
        }
        else
        {
            System.out.println("Malformed parameter string (" + params[1] + ")");
            return false;
        }

        try
        {
            lhsIndex = Integer.valueOf(lhsStrIndex);
            rhsIndex = Integer.valueOf(rhsStrIndex);
        }
        catch (NumberFormatException e)
        {
            System.out.println("Malformed parameter string (" + parameter + ") - " + e.getMessage());
            return false;
        }
        if (lhsIndex == null || rhsIndex == null)
        {
            System.out.println("Malformed parameter string (" + parameter + ")");
            return false;   // Error - incorrect parameters.
        }
        BlockPos containerPos = null;
        if (checkContainers)
        {
            String containerName = "";
            RayTraceResult rtr = Minecraft.getMinecraft().objectMouseOver;
            if (rtr != null && rtr.typeOfHit == RayTraceResult.Type.BLOCK)
            {
                containerPos = rtr.getBlockPos();
                TileEntity te = Minecraft.getMinecraft().world.getTileEntity(containerPos);
                if (te instanceof TileEntityLockableLoot)
                    containerName = ObservationFromFullInventoryImplementation.getInventoryName((IInventory)te);
                else if (te instanceof TileEntityEnderChest)
                    containerName = ObservationFromFullInventoryImplementation.getInventoryName(Minecraft.getMinecraft().player.getInventoryEnderChest());
            }
            boolean containerMatches = (lhsName.equals("inventory") || lhsName.equals(containerName)) && (rhsName.equals("inventory") || rhsName.equals(containerName));
            if (!containerMatches)
            {
                System.out.println("Missing container requested in parameter string (" + parameter + ")");
                return false;
            }
        }

        parsedParams.add(lhsName);
        parsedParams.add(lhsIndex);
        parsedParams.add(rhsName);
        parsedParams.add(rhsIndex);
        if (containerPos != null)
            parsedParams.add(containerPos);
        return true;
    }