com.linuxbox.enkive.workspace.searchResult.mongo.MongoSearchResultUtils.java Source code

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Here is the source code for com.linuxbox.enkive.workspace.searchResult.mongo.MongoSearchResultUtils.java

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/*******************************************************************************
 * Copyright 2013 The Linux Box Corporation.
 *
 * This file is part of Enkive CE (Community Edition).
 * Enkive CE is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of
 * the License, or (at your option) any later version.
 *
 * Enkive CE 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with Enkive CE. If not, see
 * <http://www.gnu.org/licenses/>.
 ******************************************************************************/
package com.linuxbox.enkive.workspace.searchResult.mongo;

import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.bson.types.ObjectId;

import com.linuxbox.enkive.archiver.MesssageAttributeConstants;
import com.linuxbox.enkive.workspace.searchResult.ResultPageException;
import com.linuxbox.util.dbinfo.mongodb.MongoDbInfo;
import com.mongodb.BasicDBList;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.MongoClient;
import com.mongodb.MongoException;

/**
 * Utility class to sort SearchResults by characteristics of the messages in the
 * results.
 * @author dang
 *
 */
public class MongoSearchResultUtils {

    DBCollection messageColl;
    DBCollection searchResultColl;

    public MongoSearchResultUtils(MongoClient m, String messageDB, String messageCollName,
            String searchResultCollName) {
        DB messageDb = m.getDB(messageDB);
        this.messageColl = messageDb.getCollection(messageCollName);
        this.searchResultColl = messageDb.getCollection(searchResultCollName);
    }

    public MongoSearchResultUtils(MongoDbInfo messageInfo, MongoDbInfo searchResultInfo) {
        this.messageColl = messageInfo.getCollection();
        this.searchResultColl = searchResultInfo.getCollection();
    }

    public List<String> sortMessagesByDate(Collection<String> messageIds, int sortDir, int pageNum, int pageSize)
            throws ResultPageException {
        return sortMessages(messageIds, MesssageAttributeConstants.DATE, sortDir, pageNum, pageSize);
    }

    public List<String> sortMessagesBySender(Collection<String> messageIds, int sortDir, int pageNum, int pageSize)
            throws ResultPageException {
        return sortMessages(messageIds, MesssageAttributeConstants.FROM, sortDir, pageNum, pageSize);
    }

    public List<String> sortMessagesByReceiver(Collection<String> messageIds, int sortDir, int pageNum,
            int pageSize) throws ResultPageException {
        return sortMessages(messageIds, MesssageAttributeConstants.TO, sortDir, pageNum, pageSize);
    }

    public List<String> sortMessagesBySubject(Collection<String> messageIds, int sortDir, int pageNum, int pageSize)
            throws ResultPageException {
        return sortMessages(messageIds, MesssageAttributeConstants.SUBJECT, sortDir, pageNum, pageSize);
    }

    protected List<String> sortMessages(Collection<String> messageIds, String sortField, int sortDirection,
            int pageNum, int pageSize) throws ResultPageException {
        ArrayList<String> sortedIds = new ArrayList<String>();
        // Only want to return the ids
        BasicDBObject keys = new BasicDBObject();
        keys.put("_id", 1);
        keys.put(sortField, 1);

        BasicDBObject query = new BasicDBObject();
        // Build object with IDs
        BasicDBList idList = new BasicDBList();
        idList.addAll(messageIds);
        BasicDBObject idQuery = new BasicDBObject();
        idQuery.put("$in", idList);
        query.put("_id", idQuery);
        // Add sort query

        DBCursor results = messageColl.find(query, keys);
        BasicDBObject orderBy = new BasicDBObject();
        orderBy.put(sortField, sortDirection);
        try {
            results = results.sort(orderBy).skip((pageNum - 1) * pageSize).limit(pageSize);
            for (DBObject result : results)
                sortedIds.add((String) result.get("_id"));
        } catch (MongoException e) {
            // Mongo failed to get the page.  Create an error message for the user.
            throw new ResultPageException("MongoDB failed to get the requested page of results", e);
        }
        return sortedIds;
    }

    public List<String> sortSearchResults(Collection<String> searchResultIds, String sortField, int sortDirection,
            int pageNum, int pageSize) {
        ArrayList<String> sortedIds = new ArrayList<String>(pageSize);
        // Only want to return the ids
        BasicDBObject keys = new BasicDBObject();
        keys.put("_id", 1);
        keys.put(sortField, 1);

        BasicDBObject query = new BasicDBObject();
        // Build object with IDs
        BasicDBList idList = new BasicDBList();
        for (String Id : searchResultIds)
            idList.add(ObjectId.massageToObjectId(Id));

        BasicDBObject idQuery = new BasicDBObject();
        idQuery.put("$in", idList);
        query.put("_id", idQuery);
        // Add sort query

        DBCursor results = searchResultColl.find(query, keys);
        BasicDBObject orderBy = new BasicDBObject();
        orderBy.put(sortField, sortDirection);
        results = results.sort(orderBy).skip((pageNum - 1) * pageSize).limit(pageSize);
        for (DBObject result : results.toArray())
            sortedIds.add((String) result.get("_id"));

        return sortedIds;
    }

}