com.trenako.images.ImagesRepositoryImpl.java Source code

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Here is the source code for com.trenako.images.ImagesRepositoryImpl.java

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/*
 * Copyright 2012 the original author or authors.
 * 
 * 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.trenako.images;

import java.util.Map;

import static org.springframework.data.mongodb.core.query.Query.*;
import static org.springframework.data.mongodb.gridfs.GridFsCriteria.*;

import com.mongodb.DBObject;
import com.mongodb.BasicDBObject;
import com.mongodb.gridfs.GridFS;
import com.mongodb.gridfs.GridFSDBFile;
import com.mongodb.gridfs.GridFSInputFile;

import com.trenako.images.UploadFile;

import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.gridfs.GridFsTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

/**
 * The concrete class for Mongo GridFs repository.
 *
 * @author Carlo Micieli
 */
@Repository("imagesRepository")
public class ImagesRepositoryImpl implements ImagesRepository {

    private final MongoDbFactory dbFactory;
    private final GridFsTemplate gridFsTemplate;

    /**
     * Creates a new {@code ImagesRepositoryImpl}.
     *
     * @param gridFsTemplate the GridFs template
     */
    @Autowired
    public ImagesRepositoryImpl(MongoDbFactory dbFactory, GridFsTemplate gridFsTemplate) {
        this.dbFactory = dbFactory;
        this.gridFsTemplate = gridFsTemplate;
    }

    @Override
    public GridFSDBFile findFileBySlug(String slug) {
        return gridFsTemplate.findOne(query(whereMetaData("slug").is(slug)));
    }

    @Override
    public void store(UploadFile file) {
        DBObject metadata = fillMetadata(file.getMetadata());

        GridFSInputFile f = getGridFs().createFile(file.getContent());
        f.setFilename(file.getFilename());
        f.setMetaData(metadata);
        f.setContentType(file.getContentType());
        f.save();
    }

    @Override
    public void delete(String slug) {
        gridFsTemplate.delete(query(whereMetaData("slug").is(slug)));
    }

    private GridFS getGridFs() {
        return new GridFS(dbFactory.getDb());
    }

    private DBObject fillMetadata(Map<String, String> metadata) {
        DBObject dbo = new BasicDBObject();
        dbo.putAll(metadata);
        return dbo;
    }
}