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package com.litongjava.db.activerecord;

import java.util.HashMap;
import java.util.Map;

/**
 * TableMapping save the mapping between model class and table.
 */
public class TableMapping {
	
	private final Map>, Table> modelToTableMap = new HashMap>, Table>(512, 0.5F);
	
	private static TableMapping me = new TableMapping(); 
	
	private TableMapping() {}
	
	public static TableMapping me() {
		return me;
	}
	
	public void putTable(Table table) {
		if (modelToTableMap.containsKey(table.getModelClass())) {
			// 支持运行时动态添加 Table 映射，不再抛出异常
			// throw new RuntimeException("Model mapping already exists : " + table.getModelClass().getName());
			System.err.println("Model mapping already exists : " + table.getModelClass().getName());
		}
		
		modelToTableMap.put(table.getModelClass(), table);
	}
	
	@SuppressWarnings("rawtypes")
	public Table getTable(Class modelClass) {
		return modelToTableMap.get(modelClass);
	}
}