public SchemaType typeForSignature()

in src/main/java/org/apache/xmlbeans/impl/schema/SchemaTypeLoaderBase.java [302:475]
160 lines of code
51 McCabe index (conditional complexity)

    public SchemaType typeForSignature(String signature) {
        int end = signature.indexOf('@');
        String uri;

        if (end < 0) {
            uri = "";
            end = signature.length();
        } else {
            uri = signature.substring(end + 1);
        }

        List<String> parts = new ArrayList<>();

        for (int index = 0; index < end; ) {
            int nextc = signature.indexOf(':', index);
            int nextd = signature.indexOf('|', index);
            int next = (nextc < 0 ? nextd : nextd < 0 ? nextc : Math.min(nextc, nextd));
            if (next < 0 || next > end) {
                next = end;
            }
            String part = signature.substring(index, next);
            parts.add(part);
            index = next + 1;
        }

        SchemaType curType = null;

        for (int i = parts.size() - 1; i >= 0; i -= 1) {
            String part = parts.get(i);
            if (part.length() < 1) {
                throw new IllegalArgumentException();
            }
            int offset = (part.length() >= 2 && part.charAt(1) == '=') ? 2 : 1;
            cases:
            switch (part.charAt(0)) {
                case 'T':
                    if (curType != null) {
                        throw new IllegalArgumentException();
                    }
                    curType = findType(QNameHelper.forLNS(part.substring(offset), uri));
                    if (curType == null) {
                        return null;
                    }
                    break;

                case 'D':
                    if (curType != null) {
                        throw new IllegalArgumentException();
                    }
                    curType = findDocumentType(QNameHelper.forLNS(part.substring(offset), uri));
                    if (curType == null) {
                        return null;
                    }
                    break;

                case 'C': // deprecated
                case 'R': // current
                    if (curType != null) {
                        throw new IllegalArgumentException();
                    }
                    curType = findAttributeType(QNameHelper.forLNS(part.substring(offset), uri));
                    if (curType == null) {
                        return null;
                    }
                    break;

                case 'E':
                case 'U': // distinguish qualified/unqualified TBD
                    if (curType != null) {
                        if (curType.getContentType() < SchemaType.ELEMENT_CONTENT) {
                            return null;
                        }
                        SchemaType[] subTypes = curType.getAnonymousTypes();
                        String localName = part.substring(offset);
                        for (SchemaType subType : subTypes) {
                            SchemaField field = subType.getContainerField();
                            if (field != null && !field.isAttribute() && field.getName().getLocalPart().equals(localName)) {
                                curType = subType;
                                break cases;
                            }
                        }
                        return null;
                    } else {
                        SchemaGlobalElement elt = findElement(QNameHelper.forLNS(part.substring(offset), uri));
                        if (elt == null) {
                            return null;
                        }
                        curType = elt.getType();
                    }
                    break;

                case 'A':
                case 'Q': // distinguish qualified/unqualified TBD
                    if (curType != null) {
                        if (curType.isSimpleType()) {
                            return null;
                        }
                        SchemaType[] subTypes = curType.getAnonymousTypes();
                        String localName = part.substring(offset);
                        for (SchemaType subType : subTypes) {
                            SchemaField field = subType.getContainerField();
                            if (field != null && field.isAttribute() && field.getName().getLocalPart().equals(localName)) {
                                curType = subType;
                                break cases;
                            }
                        }
                        return null;
                    } else {
                        SchemaGlobalAttribute attr = findAttribute(QNameHelper.forLNS(part.substring(offset), uri));
                        if (attr == null) {
                            return null;
                        }
                        curType = attr.getType();
                    }
                    break;

                case 'B':
                    if (curType == null) {
                        throw new IllegalArgumentException();
                    } else {
                        if (curType.getSimpleVariety() != SchemaType.ATOMIC) {
                            return null;
                        }
                        SchemaType[] subTypes = curType.getAnonymousTypes();
                        if (subTypes.length != 1) {
                            return null;
                        }
                        curType = subTypes[0];
                    }
                    break;

                case 'I':
                    if (curType == null) {
                        throw new IllegalArgumentException();
                    } else {
                        if (curType.getSimpleVariety() != SchemaType.LIST) {
                            return null;
                        }
                        SchemaType[] subTypes = curType.getAnonymousTypes();
                        if (subTypes.length != 1) {
                            return null;
                        }
                        curType = subTypes[0];
                    }
                    break;

                case 'M':
                    if (curType == null) {
                        throw new IllegalArgumentException();
                    } else {
                        int index;
                        try {
                            index = Integer.parseInt(part.substring(offset));
                        } catch (Exception e) {
                            throw new IllegalArgumentException();
                        }

                        if (curType.getSimpleVariety() != SchemaType.UNION) {
                            return null;
                        }
                        SchemaType[] subTypes = curType.getAnonymousTypes();
                        if (subTypes.length <= index) {
                            return null;
                        }
                        curType = subTypes[index];
                    }
                    break;

                default:
                    throw new IllegalArgumentException();
            }
        }
        return curType;
    }