RefDecoder.java

/*
 * Copyright (c) www.bugull.com
 * 
 * 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 net.tooan.ynpay.third.mongodb.decoder;

import com.mongodb.DBObject;
import net.tooan.ynpay.third.mongodb.BuguEntity;
import net.tooan.ynpay.third.mongodb.annotations.Default;
import net.tooan.ynpay.third.mongodb.annotations.Ref;
import net.tooan.ynpay.third.mongodb.cache.ConstructorCache;
import net.tooan.ynpay.third.mongodb.cache.DaoCache;
import net.tooan.ynpay.third.mongodb.mapper.FieldUtil;
import net.tooan.ynpay.third.mongodb.mapper.InternalDao;
import net.tooan.ynpay.third.mongodb.mapper.ReferenceUtil;

import java.lang.reflect.Field;

/**
 * @author Frank Wen(xbwen@hotmail.com)
 */
public class RefDecoder extends AbstractDecoder {

    private Ref ref;

    public RefDecoder(Field field, DBObject dbo) {
        super(field);
        ref = field.getAnnotation(Ref.class);
        String fieldName = field.getName();
        String name = ref.name();
        if (!name.equals(Default.NAME)) {
            fieldName = name;
        }
        value = dbo.get(fieldName);
    }

    @Override
    public void decode(Object obj) {
        String refId = ReferenceUtil.fromDbReference(ref, value);
        Class<?> clazz = FieldUtil.getRealType(field);
        BuguEntity refObj = null;
        if (ref.cascade().toUpperCase().indexOf(Default.CASCADE_READ) == -1) {
            refObj = (BuguEntity) ConstructorCache.getInstance().create(clazz);
            refObj.setId(refId);
        } else {
            InternalDao dao = DaoCache.getInstance().get(clazz);
            refObj = (BuguEntity) dao.findOne(refId);
        }
        FieldUtil.set(obj, field, refObj);
    }

}