com.ebay.cloud.cms.dal.persistence.impl.embed.EmbedGetCommand.java Source code

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Here is the source code for com.ebay.cloud.cms.dal.persistence.impl.embed.EmbedGetCommand.java

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/*
Copyright [2013-2014] eBay Software Foundation
    
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.
*/

/* 
Copyright 2012 eBay Software Foundation 
    
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 com.ebay.cloud.cms.dal.persistence.impl.embed;

import java.util.BitSet;

import com.ebay.cloud.cms.dal.entity.AbstractEntityIDHelper;
import com.ebay.cloud.cms.dal.entity.impl.BsonEntity;
import com.ebay.cloud.cms.dal.persistence.IRetrievalCommand;
import com.ebay.cloud.cms.dal.persistence.MongoExecutor;
import com.ebay.cloud.cms.dal.persistence.PersistenceContext;
import com.ebay.cloud.cms.metadata.model.InternalFieldEnum;
import com.ebay.cloud.cms.metadata.model.MetaClass;
import com.mongodb.DBObject;

/**
 * get embedded entity
 * 
 * @author jianxu1, xjiang
 *
 */
public class EmbedGetCommand extends AbstractEmbedCommand implements IRetrievalCommand {

    private BsonEntity resultEntity = null;
    private final String entityId;
    private final MetaClass entityType;

    public EmbedGetCommand(String branchId, String entityId, MetaClass entityType, AbstractEntityIDHelper helper) {
        super(branchId, helper);
        this.entityId = entityId;
        this.entityType = entityType;
    }

    @Override
    public void execute(PersistenceContext context) {
        MetaClass rootMetaClass = getRootEntityMetaClass(entityId, context);
        BitSet arrayBits = helper.checkArrayOnPath(entityId, rootMetaClass);
        // find root object & embed objects                
        DBObject getQuery = buildGetQuery(arrayBits, entityId, rootMetaClass, context);
        DBObject getField = buildGetFields(arrayBits, entityId, true, rootMetaClass);

        DBObject rootObject = MongoExecutor.findOne(context, rootMetaClass, getQuery, getField);
        if (rootObject == null) {
            return;
        }
        // extract embed object by id
        DBObject embedObject = EmbedDBObjectFilter.filter(entityId, rootObject, rootMetaClass,
                context.getQueryFields(), helper);
        if (embedObject != null) {
            resultEntity = new BsonEntity(entityType, embedObject);
            int rootVersion = (Integer) rootObject.get(InternalFieldEnum.VERSION.getDbName());
            resultEntity.setVersion(rootVersion);
        }
    }

    @Override
    public Object getResult() {
        return resultEntity;
    }

}