/*
* Copyright 2011 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 org.springframework.data.mongodb.gridfs;
import static org.springframework.data.mongodb.core.query.Query.*;
import static org.springframework.data.mongodb.gridfs.GridFsCriteria.*;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.springframework.core.io.support.ResourcePatternResolver;
import org.springframework.data.mongodb.MongoDbFactory;
import org.springframework.data.mongodb.core.QueryMapper;
import org.springframework.data.mongodb.core.convert.MongoConverter;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.util.Assert;
import org.springframework.util.StringUtils;
import com.mongodb.BasicDBObject;
import com.mongodb.DB;
import com.mongodb.DBObject;
import com.mongodb.gridfs.GridFS;
import com.mongodb.gridfs.GridFSDBFile;
import com.mongodb.gridfs.GridFSFile;
import com.mongodb.gridfs.GridFSInputFile;
/**
* {@link GridFsOperations} implementation to store content into MongoDB GridFS.
*
* @author Oliver Gierke
*/
public class GridFsTemplate implements GridFsOperations, ResourcePatternResolver {
private final MongoDbFactory dbFactory;
private final String bucket;
private final MongoConverter converter;
private final QueryMapper queryMapper;
/**
* Creates a new {@link GridFsTemplate} using the given {@link MongoDbFactory} and {@link MongoConverter}.
*
* @param dbFactory must not be {@literal null}.
* @param converter must not be {@literal null}.
*/
public GridFsTemplate(MongoDbFactory dbFactory, MongoConverter converter) {
this(dbFactory, converter, null);
}
/**
* Creates a new {@link GridFsTemplate} using the given {@link MongoDbFactory} and {@link MongoConverter}.
*
* @param dbFactory must not be {@literal null}.
* @param converter must not be {@literal null}.
* @param bucket
*/
public GridFsTemplate(MongoDbFactory dbFactory, MongoConverter converter, String bucket) {
Assert.notNull(dbFactory);
Assert.notNull(converter);
this.dbFactory = dbFactory;
this.converter = converter;
this.bucket = bucket;
this.queryMapper = new QueryMapper(converter);
}
/*
* (non-Javadoc)
* @see org.springframework.data.mongodb.gridfs.GridFsOperations#store(java.io.InputStream, java.lang.String)
*/
public GridFSFile store(InputStream content, String filename) {
return store(content, filename, (Object) null);
}
/*
* (non-Javadoc)
* @see org.springframework.data.mongodb.gridfs.GridFsOperations#store(java.io.InputStream, java.lang.String, java.lang.Object)
*/
public GridFSFile store(InputStream content, String filename, Object metadata) {
DBObject dbObject = new BasicDBObject();
converter.write(metadata, dbObject);
return store(content, filename, dbObject);
}
/*
* (non-Javadoc)
* @see org.springframework.data.mongodb.gridfs.GridFsOperations#store(java.io.InputStream, java.lang.String, com.mongodb.DBObject)
*/
public GridFSFile store(InputStream content, String filename, DBObject metadata) {
Assert.notNull(content);
Assert.hasText(filename);
Assert.notNull(metadata);
GridFSInputFile file = getGridFs().createFile(content);
file.setFilename(filename);
file.setMetaData(metadata);
file.save();
return file;
}
/*
* (non-Javadoc)
* @see org.springframework.data.mongodb.gridfs.GridFsOperations#find(com.mongodb.DBObject)
*/
public List<GridFSDBFile> find(Query query) {
return getGridFs().find(getMappedQuery(query));
}
/*
* (non-Javadoc)
* @see org.springframework.data.mongodb.gridfs.GridFsOperations#findOne(com.mongodb.DBObject)
*/
public GridFSDBFile findOne(Query query) {
return getGridFs().findOne(getMappedQuery(query));
}
/*
* (non-Javadoc)
* @see org.springframework.data.mongodb.gridfs.GridFsOperations#delete(org.springframework.data.mongodb.core.query.Query)
*/
public void delete(Query query) {
getGridFs().remove(getMappedQuery(query));
}
/*
* (non-Javadoc)
* @see org.springframework.core.io.ResourceLoader#getClassLoader()
*/
public ClassLoader getClassLoader() {
return dbFactory.getClass().getClassLoader();
}
/*
* (non-Javadoc)
* @see org.springframework.core.io.ResourceLoader#getResource(java.lang.String)
*/
public GridFsResource getResource(String location) {
return new GridFsResource(findOne(query(whereFilename().is(location))));
}
/*
* (non-Javadoc)
* @see org.springframework.core.io.support.ResourcePatternResolver#getResources(java.lang.String)
*/
public GridFsResource[] getResources(String locationPattern) {
if (!StringUtils.hasText(locationPattern)) {
return new GridFsResource[0];
}
AntPath path = new AntPath(locationPattern);
if (path.isPattern()) {
List<GridFSDBFile> files = find(query(whereFilename().regex(path.toRegex())));
List<GridFsResource> resources = new ArrayList<GridFsResource>(files.size());
for (GridFSDBFile file : files) {
resources.add(new GridFsResource(file));
}
return resources.toArray(new GridFsResource[resources.size()]);
}
return new GridFsResource[] { getResource(locationPattern) };
}
private DBObject getMappedQuery(Query query) {
return query == null ? null : queryMapper.getMappedObject(query.getQueryObject(), null);
}
private GridFS getGridFs() {
DB db = dbFactory.getDb();
return bucket == null ? new GridFS(db) : new GridFS(db, bucket);
}
}