package frame.persist.loader;

import frame.object.data.ObjectList;
import frame.object.meta.Field;
import frame.object.reader.EntityReaderContainer;
import frame.object.reader.ObjectReader;

import java.sql.ResultSet;
import java.util.List;

public class ListLoader<T> extends DataLoader {

	protected static EntityReaderContainer objectReaderContainer;
	private Class<T> clazz;
	private ObjectReader objectReader;
	private ObjectList<T> list;
	
	static {
		objectReaderContainer = EntityReaderContainer.getInstance();
	}

	public ListLoader(String tableName, Class<T> clazz) throws Exception {
		super(tableName);
		
		this.clazz = clazz;
		objectReader = objectReaderContainer.getObjectReader(clazz);
	}
	
	@Override 
	protected void loadData(ResultSet rslt) throws Exception {
		list = new ObjectList<T>();

		List<Field> fields = entityMeta.getFields();
		T object; int size = fields.size(); String name;
		int idx_id = entityMeta.getIndex("id");

		while (rslt.next()) {
			object = clazz.newInstance();
			String id = null;

			for (int i = 0; i < size; i++) {
				Field field = fields.get(i);
				name = field.getName();

				if (i == idx_id) {
					id = rslt.getString(i + 1);
				}

				if (objectReader.containsProperty(name)) {
					Object value = rslt.getObject(i + 1);
					objectReader.setData(name, value, object);
				}
			}

			list.add(id, object);
		}
	}

	public ObjectList<T> getList() {
		return list;
	}

}