net.ymate.platform.persistence.mongodb.support.MongoEntitySupport.java Source code

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Here is the source code for net.ymate.platform.persistence.mongodb.support.MongoEntitySupport.java

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/*
 * Copyright 2007-2107 the original author or authors.
 *
 * 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.ymate.platform.persistence.mongodb.support;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;

import net.ymate.platform.commons.lang.BlurObject;
import net.ymate.platform.commons.util.ClassUtils;
import net.ymate.platform.commons.util.ClassUtils.ClassBeanWrapper;
import net.ymate.platform.persistence.mongodb.MongoDB;

import org.bson.types.ObjectId;

import com.mongodb.BasicDBObject;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;

/**
 * <p>
 * MongoEntitySupport
 * </p>
 * <p>
 * 
 * </p>
 * 
 * @author (suninformation@163.com)
 * @version 0.0.0
 *          <table style="border:1px solid gray;">
 *          <tr>
 *          <th width="100px">?</th><th width="100px"></th><th
 *          width="100px"></th><th width="100px"></th>
 *          </tr>
 *          <!--  Table ?? -->
 *          <tr>
 *          <td>0.0.0</td>
 *          <td></td>
 *          <td></td>
 *          <td>2014216?5:54:50</td>
 *          </tr>
 *          </table>
 */
public class MongoEntitySupport {

    /**
     * ???
     */
    private static Map<Class<?>, MongoEntityMeta> __cacheEntityMetas = new ConcurrentHashMap<Class<?>, MongoEntityMeta>();

    public static MongoEntityMeta getEntityMeta(Class<?> entity) {
        MongoEntityMeta _meta = __cacheEntityMetas.get(entity);
        if (_meta == null) {
            _meta = new MongoEntityMeta(entity);
            __cacheEntityMetas.put(entity, _meta);
        }
        return _meta;
    }

    public static String getEntityName(Class<?> entity) {
        return getEntityMeta(entity).getTableName();
    }

    public static DBObject getEntityFields(Class<?> entity) {
        DBObject _keys = new BasicDBObject();
        for (String _c : getEntityMeta(entity).getColumnNames()) {
            _keys.put(_c, 1);
        }
        return _keys;
    }

    public static <T> T randerToEntity(Class<T> entity, DBObject object) {
        MongoEntityMeta _meta = getEntityMeta(entity);
        if (_meta.isCompositeKey()) {
            // Not Support...
            throw new UnsupportedOperationException("Do not support composite keys of entity bean.");
        }
        ClassBeanWrapper<T> _returnValue = ClassUtils.wrapper(entity);
        for (String key : _meta.getColumnNames()) {
            Object value = object.get(key);
            if (value == null) {
                continue;
            }
            String _classAttr = _meta.getClassAttributeMap().get(key);
            _returnValue.setValue(_classAttr,
                    new BlurObject(value).toObjectValue(_returnValue.getFieldType(_classAttr)));
        }
        return _returnValue.getTarget();
    }

    public static <T> List<T> randerToEntities(Class<T> entity, DBCursor cursor) {
        List<T> _resultList = new ArrayList<T>();
        while (cursor.hasNext()) {
            DBObject _object = cursor.next();
            _resultList.add(randerToEntity(entity, _object));
        }
        cursor.close();
        return _resultList;
    }

    public static <T> List<T> randerToEntities(Class<T> entity, Collection<DBObject> objects) {
        List<T> _resultList = new ArrayList<T>();
        for (DBObject _object : objects) {
            _resultList.add(randerToEntity(entity, _object));
        }
        return _resultList;
    }

    public static DBObject randerToDBObject(Object object) {
        MongoEntityMeta _meta = getEntityMeta(object.getClass());
        ClassBeanWrapper<?> _wrapper = ClassUtils.wrapper(object);
        DBObject _returnObj = new BasicDBObject();
        for (String _key : _meta.getColumnNames()) {
            Object _value = _wrapper.getValue(_meta.getClassAttributeMap().get(_key));
            if (_value == null) {
                _returnObj.put(_key, null);
                continue;
            }
            if (_key.equals(MongoDB.OPT.ID)) {
                _returnObj.put(_key, new ObjectId(_value.toString()));
            } else {
                _returnObj.put(_key, _value);
            }
        }
        return _returnObj;
    }

}