private static String joinURI()

in src/main/java/org/apache/xml/security/c14n/implementations/XmlAttrStack.java [170:239]
66 lines of code
13 McCabe index (conditional complexity)

    private static String joinURI(String baseURI, String relativeURI) throws URISyntaxException {
        String bscheme = null;
        String bauthority = null;
        String bpath = "";
        String bquery = null;

        // pre-parse the baseURI
        if (baseURI != null) {
            if (baseURI.endsWith("..")) {
                baseURI = baseURI + "/";
            }
            URI base = new URI(baseURI);
            bscheme = base.getScheme();
            bauthority = base.getAuthority();
            bpath = base.getPath();
            bquery = base.getQuery();
        }

        URI r = new URI(relativeURI);
        String rscheme = r.getScheme();
        String rauthority = r.getAuthority();
        String rpath = r.getPath();
        String rquery = r.getQuery();

        String tscheme, tauthority, tpath, tquery;
        if (rscheme != null && rscheme.equals(bscheme)) {
            rscheme = null;
        }
        if (rscheme != null) {
            tscheme = rscheme;
            tauthority = rauthority;
            tpath = removeDotSegments(rpath);
            tquery = rquery;
        } else {
            if (rauthority != null) {
                tauthority = rauthority;
                tpath = removeDotSegments(rpath);
                tquery = rquery;
            } else {
                if (rpath.length() == 0) {
                    tpath = bpath;
                    if (rquery != null) {
                        tquery = rquery;
                    } else {
                        tquery = bquery;
                    }
                } else {
                    if (rpath.charAt(0) == '/') {
                        tpath = removeDotSegments(rpath);
                    } else {
                        if (bauthority != null && bpath.length() == 0) {
                            tpath = "/" + rpath;
                        } else {
                            int last = bpath.lastIndexOf('/');
                            if (last == -1) {
                                tpath = rpath;
                            } else {
                                tpath = bpath.substring(0, last+1) + rpath;
                            }
                        }
                        tpath = removeDotSegments(tpath);
                    }
                    tquery = rquery;
                }
                tauthority = bauthority;
            }
            tscheme = bscheme;
        }
        return new URI(tscheme, tauthority, tpath, tquery, null).toString();
    }