EntityX annotations mapping

EntityX.java

public abstract class EntityX {
    static class EntityMetaData {
        String key;
        Class entityType;
        Class<?> collectionType;
        boolean isArray = false;
        boolean isDerivedFromEntity;
        EntityMetaData(String key, Class entityType, Class collectionType) {
            this.key = key;
            this.entityType = entityType;
            this.collectionType = collectionType;
            isArray = true;
            isDerivedFromEntity = EntityX.class.isAssignableFrom(entityType);
        }
        EntityMetaData(String key, Class entityType) {
            this.key = key;
            this.entityType = entityType;
            this.collectionType = void.class;
            isDerivedFromEntity = EntityX.class.isAssignableFrom(entityType);
        }
        public Class getEntityType() {
            return entityType;
        }
    }

    protected HashMap<String, EntityMetaData>fields;
    void bind(EntityX clzz) {
        try {
            fields = new HashMap<>();
            for (Field field : clzz.getClass().getDeclaredFields()) {
                final BindField bf = field.getAnnotation(BindField.class);
                if (bf != null) {
                    String field_name = bf.value();
                    Class clz = field.getType();
                    if (Iterable.class.isAssignableFrom(clz)) {
                        Type type = field.getGenericType();
                        ParameterizedType pt = (ParameterizedType) type;
                        Type innerType = pt.getActualTypeArguments()[0];
                        Class<?> innerClass = (Class<?>) innerType;

                        fields.put(field.getName(), new EntityMetaData(field_name, innerClass, clz));
                    } else {
                        fields.put(field.getName(), new EntityMetaData(field_name, clz));
                    }
                }
            }
        } catch (Exception E) {
            E.printStackTrace();
        }
    }

    protected EntityX() {
        bind(this);
    }
  }
}