org.aw20.mongoworkbench.command.AggregateMongoCommand.java Source code

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Here is the source code for org.aw20.mongoworkbench.command.AggregateMongoCommand.java

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/* 
 *  MongoWorkBench is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  Free Software Foundation,version 3.
 *  
 *  MongoWorkBench is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *  
 *  You should have received a copy of the GNU General Public License
 *  If not, see http://www.gnu.org/licenses/
 *  
 *  Additional permission under GNU GPL version 3 section 7
 *  
 *  If you modify this Program, or any covered work, by linking or combining 
 *  it with any of the JARS listed in the README.txt (or a modified version of 
 *  (that library), containing parts covered by the terms of that JAR, the 
 *  licensors of this Program grant you additional permission to convey the 
 *  resulting work. 
 *  
 *  https://github.com/aw20/MongoWorkBench
 */
package org.aw20.mongoworkbench.command;

import org.aw20.mongoworkbench.MongoFactory;

import com.mongodb.BasicDBList;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.MongoClient;

public class AggregateMongoCommand extends GroupMongoCommand {

    @Override
    public void execute() throws Exception {
        MongoClient mdb = MongoFactory.getInst().getMongo(sName);

        if (mdb == null)
            throw new Exception("no server selected");

        if (sDb == null)
            throw new Exception("no database selected");

        MongoFactory.getInst().setActiveDB(sDb);

        DB db = mdb.getDB(sDb);
        BasicDBObject cmdMap = parseMongoCommandString(db, cmd);

        if (!cmdMap.containsField("aggregateArg"))
            throw new Exception("no aggregate document");

        // Execute the command
        Object result = db.eval(cmd, (Object[]) null);

        if (result == null)
            throw new Exception("null returned");
        if (!(result instanceof BasicDBObject))
            throw new Exception("not correct type returned: " + result.getClass().getName());

        BasicDBObject dbo = (BasicDBObject) result;
        if (dbo.containsField("result")) {
            dbListResult = (BasicDBList) dbo.get("result");
            setMessage("# rows=" + dbListResult.size());
        } else {
            setMessage("# rows=0");
        }
    }

    @Override
    public void parseCommandStr() throws Exception {
        sColl = getCollNameFromAction(cmd, "aggregate");

        if (sColl == null || sColl.length() == 0)
            throw new Exception("failed to determine collection from command");
    }
}