Examples with RequireExistenceOf io.github.nucleuspowered.nucleus.internal.annotations.RequireExistenceOf used on opensource projects

Example 1 with RequireExistenceOf

use of io.github.nucleuspowered.nucleus.internal.annotations.RequireExistenceOf in project Nucleus by NucleusPowered.

the class StandardModule method getInstance.

private <T> T getInstance(Class<T> clazz, boolean checkMethods) {
    try {
        RequireExistenceOf[] v = clazz.getAnnotationsByType(RequireExistenceOf.class);
        if (v.length > 0) {
            try {
                for (RequireExistenceOf r : v) {
                    String toFind = r.value();
                    String[] a;
                    if (toFind.contains("#")) {
                        a = toFind.split("#", 2);
                    } else {
                        a = new String[] { toFind };
                    }
                    // Check the class.
                    Class<?> c = Class.forName(a[0]);
                    if (a.length == 2) {
                        // Check the method
                        Method[] methods = c.getDeclaredMethods();
                        boolean methodFound = false;
                        for (Method m : methods) {
                            if (m.getName().equals(a[1])) {
                                methodFound = true;
                                break;
                            }
                        }
                        if (!methodFound) {
                            if (r.showError()) {
                                throw new RuntimeException();
                            }
                            return null;
                        }
                    }
                }
            } catch (ClassNotFoundException | RuntimeException | NoClassDefFoundError e) {
                plugin.getLogger().warn(NucleusPlugin.getNucleus().getMessageProvider().getMessageWithFormat("startup.injectablenotloaded", clazz.getName()));
                return null;
            }
        }
        if (checkMethods) {
            // This checks all the methods to ensure the classes in question exist.
            clazz.getDeclaredMethods();
        }
        return clazz.newInstance();
    // I can't believe I have to do this...
    } catch (IllegalAccessException | InstantiationException | RuntimeException | NoClassDefFoundError e) {
        if (clazz.isAnnotationPresent(SkipOnError.class)) {
            plugin.getLogger().warn(NucleusPlugin.getNucleus().getMessageProvider().getMessageWithFormat("startup.injectablenotloaded", clazz.getName()));
            return null;
        }
        if (e instanceof RuntimeException) {
            throw (RuntimeException) e;
        } else {
            throw new RuntimeException(e);
        }
    }
}