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package de.terrestris.shogun2.helper;

import de.terrestris.shogun2.model.PersistentObject;

import java.lang.reflect.Field;

public class IdHelper {

    /**
     * Helper method that uses reflection to set the (inaccessible) id field of
     * the given {@link PersistentObject}.
     *
     * @param persistentObject The object with the inaccessible id field
     * @param id               The id to set
     * @throws NoSuchFieldException
     * @throws IllegalAccessException
     */
    public static final void setIdOnPersistentObject(
        PersistentObject persistentObject, Integer id)
        throws NoSuchFieldException, IllegalAccessException {
        // use reflection to get the inaccessible final field 'id'
        Field idField = PersistentObject.class.getDeclaredField("id");

        // make the field accessible and set the value
        idField.setAccessible(true);
        idField.set(persistentObject, id);
        idField.setAccessible(false);
    }
}