com.bluedragon.mongo.MongoCollectionDistinct.java Source code

Introduction

Here is the source code for com.bluedragon.mongo.MongoCollectionDistinct.java

Source

/* 
 *  Copyright (C) 2000 - 2015 TagServlet Ltd
 *
 *  This file is part of Open BlueDragon (OpenBD) CFML Server Engine.
 *  
 *  OpenBD 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.
 *  
 *  OpenBD 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
 *  along with OpenBD.  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. 
 *  README.txt @ http://www.openbluedragon.org/license/README.txt
 *  
 *  http://openbd.org/
 */
package com.bluedragon.mongo;

import com.mongodb.Block;
import com.mongodb.MongoException;
import com.mongodb.client.DistinctIterable;
import com.mongodb.client.MongoDatabase;
import com.naryx.tagfusion.cfm.engine.cfArgStructData;
import com.naryx.tagfusion.cfm.engine.cfArrayData;
import com.naryx.tagfusion.cfm.engine.cfData;
import com.naryx.tagfusion.cfm.engine.cfSession;
import com.naryx.tagfusion.cfm.engine.cfStringData;
import com.naryx.tagfusion.cfm.engine.cfmRunTimeException;

public class MongoCollectionDistinct extends MongoDatabaseList {

    private static final long serialVersionUID = 1L;

    public MongoCollectionDistinct() {
        min = 3;
        max = 4;
        setNamedParams(new String[] { "datasource", "collection", "key", "query" });
    }

    public String[] getParamInfo() {
        return new String[] { "datasource name.  Name previously created using MongoRegister", "collection name",
                "key to find", "optional query" };
    }

    public java.util.Map<String, String> getInfo() {
        return makeInfo("mongo",
                "Finds all the distinct values for the key for the collection against the optional query",
                ReturnType.ARRAY);
    }

    public cfData execute(cfSession _session, cfArgStructData argStruct) throws cfmRunTimeException {
        MongoDatabase db = getMongoDatabase(_session, argStruct);

        String collection = getNamedStringParam(argStruct, "collection", null);
        if (collection == null)
            throwException(_session, "please specify a collection");

        String key = getNamedStringParam(argStruct, "key", null);
        if (key == null)
            throwException(_session, "please specify a key");

        cfData query = getNamedParam(argStruct, "query", null);

        try {

            DistinctIterable<String> result;
            if (query != null)
                result = db.getCollection(collection).distinct(key, String.class).filter(getDocument(query));
            else
                result = db.getCollection(collection).distinct(key, String.class);

            cfArrayData arr = cfArrayData.createArray(1);

            result.forEach(new Block<String>() {

                @Override
                public void apply(final String st) {
                    try {
                        arr.addElement(new cfStringData(st));
                    } catch (cfmRunTimeException e) {
                    }
                }
            });

            return arr;

        } catch (MongoException me) {
            throwException(_session, me.getMessage());
            return null;
        }
    }
}