/**
 * 
 * Copyright 2014 The Darks ORM Project (Liu lihua)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package darks.orm.core.cache;

import java.util.concurrent.ConcurrentMap;

import darks.orm.core.data.EntityData;
import darks.orm.core.data.FieldData;
import darks.orm.core.data.FieldData.FieldFlag;

public class CacheObjectUpdater
{
    
    public static void update(CacheKey key, Object oldcache, Object newcache)
    {
        update(key, (CacheObject)oldcache, (CacheObject)newcache);
    }
    
    /**
     * ���»���ʵ�����ֵ
     * 
     * @param key ��ֵ
     * @param oldcache �û���ʵ��
     * @param newcache �»���ʵ��
     */
    public static void update(CacheKey key, CacheObject oldcache, CacheObject newcache)
    {
        try
        {
            Object oldobj = oldcache.getObject();
            Object newobj = newcache.getObject();
            EntityData data = key.getData();
            ConcurrentMap<String, FieldData> map = data.getMapNameFields();
            for (FieldData fdata : map.values())
            {
                // System.out.println(fdata.getFieldName()+" "+fdata.getFieldType());
                if (fdata.getFieldFlag() == FieldFlag.FkEntity)
                {
                    Object foldobj = fdata.getValue(oldobj);
                    Object fnewobj = fdata.getValue(newobj);
                    if (fnewobj == null)
                        continue;
                    if (foldobj == null)
                    {
                        fdata.setValue(oldobj, fnewobj);
                    }
                    else
                    {
                        EntityData fedata = fdata.getFkData();
                        ConcurrentMap<String, FieldData> fmap = fedata.getMapNameFields();
                        for (FieldData fkdata : fmap.values())
                        {
                            Object fkoldobj = fkdata.getValue(oldobj);
                            Object fknewobj = fkdata.getValue(newobj);
                            if (fkoldobj == null || !fkoldobj.equals(fknewobj))
                            {
                                fkdata.setValue(oldobj, fknewobj);
                            }
                        }
                    }
                }
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }
}