private void remove()

in src/main/java/org/apache/bcel/generic/InstructionList.java [1000:1045]
46 lines of code
9 McCabe index (conditional complexity)

    private void remove(final InstructionHandle prev, InstructionHandle next) throws TargetLostException {
        InstructionHandle first;
        InstructionHandle last; // First and last deleted instruction
        if (prev == null && next == null) {
            first = start;
            last = end;
            start = end = null;
        } else {
            if (prev == null) { // At start of list
                first = start;
                start = next;
            } else {
                first = prev.getNext();
                prev.setNext(next);
            }
            if (next == null) { // At end of list
                last = end;
                end = prev;
            } else {
                last = next.getPrev();
                next.setPrev(prev);
            }
        }
        first.setPrev(null); // Completely separated from rest of list
        last.setNext(null);
        final List<InstructionHandle> targetList = new ArrayList<>();
        for (InstructionHandle ih = first; ih != null; ih = ih.getNext()) {
            ih.getInstruction().dispose(); // e.g. BranchInstructions release their targets
        }
        final StringBuilder buf = new StringBuilder("{ ");
        for (InstructionHandle ih = first; ih != null; ih = next) {
            next = ih.getNext();
            length--;
            if (ih.hasTargeters()) { // Still got targeters?
                targetList.add(ih);
                buf.append(ih.toString(true)).append(" ");
                ih.setNext(ih.setPrev(null));
            } else {
                ih.dispose();
            }
        }
        buf.append("}");
        if (!targetList.isEmpty()) {
            throw new TargetLostException(targetList.toArray(InstructionHandle.EMPTY_ARRAY), buf.toString());
        }
    }