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package org.datafx.util;

import java.lang.reflect.Field;
import java.net.URL;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;

/**
 * General util class
 */
public class DataFXUtils {

    /**
     * Checks if the resource / file can be accessed by the controller class
     * @param controllerClass the controller class
     * @param resourceName name / path of the resource
     * @return true if the resource can be accessed
     */
    public static boolean canAccess(Class controllerClass, String resourceName) {
        try {
            URL url = controllerClass.getResource(resourceName);
            if (url == null) {
                return false;
            }
            return true;
        } catch (Exception e) {
        }
        return false;
    }

    /**
     * Set's a field by using AccessController.doPrivileged
     * @param field the field
     * @param bean  the bean
     * @param value the value
     */
    public static void setPrivileged(final Field field, final Object bean,
                                     final Object value) {
        AccessController.doPrivileged(new PrivilegedAction() {
            @Override
            public Void run() {
                boolean wasAccessible = field.isAccessible();
                try {
                    field.setAccessible(true);
                    field.set(bean, value);
                    return null; // return nothing...
                } catch (IllegalArgumentException | IllegalAccessException ex) {
                    throw new IllegalStateException("Cannot set field: "
                            + field, ex);
                } finally {
                    field.setAccessible(wasAccessible);
                }
            }
        });
    }

    /**
     * Access a field by using AccessController.doPrivileged
     * @param field the field
     * @param bean the bean
     * @return the value
     */
    public static Object getPrivileged(final Field field, final Object bean) {
        return AccessController.doPrivileged(new PrivilegedAction