public ClassMetaDataIterator()

in transform/src/patch/java/org/apache/openjpa/lib/meta/ClassMetaDataIterator.java [65:148]
65 lines of code
17 McCabe index (conditional complexity)

    public ClassMetaDataIterator(Class<?> cls, String suffix,
            ClassLoader loader, boolean topDown) {
        // skip classes that can't have metadata
        if (cls != null && (cls.isPrimitive()
            || cls.getName().startsWith("java.")
            || cls.getName().startsWith("javax.")
            || cls.getName().startsWith("jakarta."))) {
            _loader = null;
            _locs = Collections.emptyList();
            return;
        }

        if (loader == null) {
            MultiClassLoader multi = AccessController
                .doPrivileged(J2DoPrivHelper.newMultiClassLoaderAction());
            multi.addClassLoader(MultiClassLoader.SYSTEM_LOADER);
            multi.addClassLoader(MultiClassLoader.THREAD_LOADER);
            multi.addClassLoader(getClass().getClassLoader());
            if (cls != null)
            {
                ClassLoader clsLoader = (ClassLoader)
                    AccessController.doPrivileged(
                        J2DoPrivHelper.getClassLoaderAction(cls));
                if (clsLoader != null)
                    multi.addClassLoader(clsLoader);
            }
            loader = multi;
        }
        _loader = loader;

        // collect the set of all possible metadata locations; start with
        // system locations
        _locs = new ArrayList<>();
        _locs.add("META-INF/package" + suffix);
        _locs.add("WEB-INF/package" + suffix);
        _locs.add("package" + suffix);

        // put this legacy location at the end regardless of whether we're
        // going top down or bottom up so we don't have to parse it as often
        // during testing
        if (!topDown)
            _locs.add("system" + suffix);

        if (cls != null) {
            // also check:
            // 1. for each package from the top down to cls' package:
            // <path>/package<suffix>
            // <path>/<package-name><suffix> (legacy support)
            // <path>/../<package-name><suffix> (legacy support)
            // 2. <path>/<class-name><suffix>
            String pkg = ClassUtil.getPackageName(cls).replace('.', '/');
            if (pkg.length() > 0) {
                int idx, start = 0;
                String pkgName, path, upPath = "";
                do {
                    idx = pkg.indexOf('/', start);
                    if (idx == -1) {
                        pkgName = (start == 0) ? pkg : pkg.substring(start);
                        path = pkg + "/";
                    } else {
                        pkgName = pkg.substring(start, idx);
                        path = pkg.substring(0, idx + 1);
                    }

                    _locs.add(path + "package" + suffix);
                    _locs.add(path + pkgName + suffix); // legacy
                    _locs.add(upPath + pkgName + suffix); // legacy
                    if (idx == -1)
                        _locs.add(path + ClassUtil.getClassName(cls) + suffix);

                    start = idx + 1;
                    upPath = path;
                }
                while (idx != -1);
            } else {
                // <class-name><suffix> for top-level classes
                _locs.add(cls.getName() + suffix);
            }
        }
        if (topDown)
            _locs.add("system" + suffix); // legacy
        else
            Collections.reverse(_locs);
    }