com.mongo.gridfs.GridFSFileLoader.java Source code

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Here is the source code for com.mongo.gridfs.GridFSFileLoader.java

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/*
 * GridFSFileLoader
 * 
 * 
 *-----------------------------------------------------------------------
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Library General Public License as published
 *   by the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program 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 Library General Public License for more details.
 *
 *   You should have received a copy of the GNU Library General Public
 *   License along with this program; if not, write to the Free Software
 *   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *----------------------------------------------------------------------
 */

package com.mongo.gridfs;

import java.io.InputStream;
import java.net.UnknownHostException;
import java.util.Map;
import java.util.Map.Entry;

import com.mongodb.BasicDBObject;
import com.mongodb.Mongo;
import com.mongodb.MongoException;
import com.mongodb.gridfs.GridFS;
import com.mongodb.gridfs.GridFSInputFile;

public class GridFSFileLoader {

    private GridFS gridfs;
    private Mongo mon;

    public GridFSFileLoader() {
        try {
            mon = new Mongo();
        } catch (UnknownHostException e) {
            throw new IllegalStateException(e);
        } catch (MongoException e) {
            throw new IllegalStateException(e);
        }

        gridfs = new GridFS(mon.getDB("filernd"));
    }

    public void loadFile(String fileToLoad, String contentType, Map<String, String> metaData) {
        InputStream is = new GridFSFileValidator().loadFile(fileToLoad);
        GridFSInputFile file = gridfs.createFile(is);
        file.setContentType(contentType);
        file.setFilename(fileToLoad);
        BasicDBObject metadata = new BasicDBObject();
        if (metaData != null) {
            for (Entry<String, String> entry : metaData.entrySet()) {
                metadata.put(entry.getKey(), entry.getValue());
            }
        }
        file.setMetaData(metadata);
        file.save();
    }

    public InputStream retrieveFileStream(String fileName) {
        return gridfs.findOne(fileName).getInputStream();
    }

    public void remove(String fileName) {
        gridfs.remove(fileName);
    }

}