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/**
* Copyright (c) 2010 - 2012 10gen, Inc.
* Copyright (c) 2009, 2010 Novus Partners, Inc.
*
* 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.
*
* For questions and comments about this product, please see the project page at:
*
* http://github.com/mongodb/casbah
*
*/
package com.mongodb.casbah
package gridfs
import com.mongodb.casbah.Imports._
import com.mongodb.casbah.gridfs.Imports._
import com.mongodb.casbah.commons.Logging
import com.mongodb.casbah.commons.conversions.scala._
import com.mongodb.DBObject
import com.mongodb.gridfs.{ GridFS => MongoGridFS, GridFSDBFile => MongoGridFSDBFile, GridFSFile => MongoGridFSFile, GridFSInputFile => MongoGridFSInputFile }
import java.io._
import scala.reflect._
import scala.collection.JavaConverters._
import com.github.nscala_time.time.Imports._
// todo - look into potential naming conflicts...
/**
* Companion object for GridFS.
* Entry point for creation of GridFS Instances.
*
* @since 1.0
*/
object GridFS extends Logging {
def apply(db: MongoDB) = {
log.info("Creating a new GridFS Entry against DB '%s', using default bucket ('%s')", db.name, MongoGridFS.DEFAULT_BUCKET)
new GridFS(new MongoGridFS(db.underlying))
}
def apply(db: MongoDB, bucket: String) = {
log.info("Creating a new GridFS Entry against DB '%s', using specific bucket ('%s')", db.name, bucket)
new GridFS(new MongoGridFS(db.underlying, bucket))
}
}
class GridFS protected[gridfs] (val underlying: MongoGridFS) extends Iterable[GridFSDBFile] with Logging {
log.info("Instantiated a new GridFS instance against '%s'", underlying)
type FileOp = GridFSFile => Unit
type FileWriteOp = GridFSInputFile => Unit
type FileReadOp = GridFSDBFile => Unit
implicit val db = underlying.getDB().asScala
def iterator = new Iterator[GridFSDBFile] {
val fileSet = files
def count() = fileSet.count
override def length() = fileSet.length
def numGetMores() = fileSet.numGetMores
def numSeen() = fileSet.numSeen
def curr() = new GridFSDBFile(fileSet.next().asInstanceOf[MongoGridFSDBFile])
def explain() = fileSet.explain
def next() = new GridFSDBFile(fileSet.next.asInstanceOf[MongoGridFSDBFile])
def hasNext: Boolean = fileSet.hasNext
}
/**
* loan
*
* Basic implementation of the Loan pattern -
* the idea is to pass a Unit returning function
* and a Mongo file handle, and work on it within
* a code block.
*
*/
protected[gridfs] def loan[T <: GenericGridFSFile](file: T)(op: T => Option[AnyRef]) = op(file)
/**
* Create a new GridFS File from a scala.io.Source
*
* Uses a loan pattern, so you need to pass a curried function which expects a GridFSInputFile
* as a parameter.
* It AUTOMATICALLY saves the GridFS file at it's end, so throw an exception if you want to fail.
* If you don't want automatic saving/loaning please see the createFile method instead.
* @see createFile
* @return The ID of the created File (Option[AnyRef])
*/
def apply(data: scala.io.Source)(op: FileWriteOp) = withNewFile(data)(op)
/**
* Create a new GridFS File from a Byte Array
*
* Uses a loan pattern, so you need to pass a curried function which expects a GridFSInputFile
* as a parameter.
* It AUTOMATICALLY saves the GridFS file at it's end, so throw an exception if you want to fail.
* If you don't want automatic saving/loaning please see the createFile method instead.
* @see createFile
* @return The ID of the created File (Option[AnyRef])
*/
def apply(data: Array[Byte])(op: FileWriteOp) = withNewFile(data)(op)
/**
* Create a new GridFS File from a java.io.File
*
* Uses a loan pattern, so you need to pass a curried function which expects a GridFSInputFile
* as a parameter.
* It AUTOMATICALLY saves the GridFS file at it's end, so throw an exception if you want to fail.
* If you don't want automatic saving/loaning please see the createFile method instead.
* @see createFile
* @return The ID of the created File (Option[AnyRef])
*/
def apply(f: File)(op: FileWriteOp) = withNewFile(f)(op)
/**
* Create a new GridFS File from a java.io.InputStream
*
* Uses a loan pattern, so you need to pass a curried function which expects a GridFSInputFile
* as a parameter.
* It AUTOMATICALLY saves the GridFS file at it's end, so throw an exception if you want to fail.
* If you don't want automatic saving/loaning please see the createFile method instead.
* @see createFile
* @return The ID of the created File (Option[AnyRef])
*/
def apply(in: InputStream)(op: FileWriteOp) = withNewFile(in)(op)
/**
* Create a new GridFS File from a java.io.InputStream and a specific filename
*
* Uses a loan pattern, so you need to pass a curried function which expects a GridFSInputFile
* as a parameter.
* It AUTOMATICALLY saves the GridFS file at it's end, so throw an exception if you want to fail.
* If you don't want automatic saving/loaning please see the createFile method instead.
* @see createFile
* @return The ID of the created File (Option[AnyRef])
*/
def apply(in: InputStream, filename: String)(op: FileWriteOp) = withNewFile(in, filename)(op)
/**
* createFile
*
* Creates a new file in GridFS
*
* TODO - Should the curried versions give the option to not automatically save?
*/
def createFile(data: scala.io.Source): GridFSInputFile = throw new UnsupportedOperationException("Currently no support for scala.io.Source")
def withNewFile(data: scala.io.Source)(op: FileWriteOp) = throw new UnsupportedOperationException("Currently no support for scala.io.Source")
def createFile(data: Array[Byte]): GridFSInputFile = underlying.createFile(data)
/**
* Loan pattern style file creation.
* @return The ID of the created File (Option[AnyRef])
*/
def withNewFile(data: Array[Byte])(op: FileWriteOp) = loan(createFile(data)) { fh =>
op(fh)
fh.save()
fh.validate()
Option(fh.id)
}
def createFile(f: File): GridFSInputFile = underlying.createFile(f)
/**
* Loan pattern style file creation.
* @return The ID of the created File (Option[AnyRef])
*/
def withNewFile(f: File)(op: FileWriteOp) = loan(createFile(f)) { fh =>
op(fh)
fh.save()
fh.validate()
Option(fh.id)
}
def createFile(in: InputStream): GridFSInputFile = underlying.createFile(in)
/**
* Loan pattern style file creation.
* @return The ID of the created File (Option[AnyRef])
*/
def withNewFile(in: InputStream)(op: FileWriteOp) = loan(createFile(in)) { fh =>
op(fh)
fh.save()
fh.validate()
Option(fh.id)
}
def createFile(in: InputStream, filename: String): GridFSInputFile = underlying.createFile(in, filename)
/**
* Loan pattern style file creation.
* @return The ID of the created File (Option[AnyRef])
*/
def withNewFile(in: InputStream, filename: String)(op: FileWriteOp) = loan(createFile(in, filename)) { fh =>
op(fh)
fh.save()
fh.validate()
Option(fh.id)
}
/** Find by query - returns a list */
def find[A <% DBObject](query: A) = underlying.find(query).asScala
/** Find by query - returns a single item */
def find(id: ObjectId): GridFSDBFile = underlying.find(id)
/** Find by query - returns a list */
def find(filename: String) = underlying.find(filename).asScala
def findOne[A <% DBObject](query: A): Option[GridFSDBFile] = {
underlying.findOne(query) match {
case null => None
case x => Some(x)
}
}
def findOne(id: ObjectId): Option[GridFSDBFile] = {
underlying.findOne(id) match {
case null => None
case x => Some(x)
}
}
def findOne(filename: String): Option[GridFSDBFile] = {
underlying.findOne(filename) match {
case null => None
case x => Some(x)
}
}
def bucketName = underlying.getBucketName
/**
* Returns a cursor for this filestore
* of all of the files...
*/
def files = { new MongoCursor(underlying.getFileList) }
def files[A <% DBObject](query: A) = { new MongoCursor(underlying.getFileList(query)) }
def remove[A <% DBObject](query: A) = underlying.remove(query)
def remove(id: ObjectId) = underlying.remove(id)
def remove(filename: String) = underlying.remove(filename)
}
@BeanInfo
abstract class GenericGridFSFile(override val underlying: MongoGridFSFile) extends MongoDBObject with Logging {
type DateType
def convertDate(in: AnyRef): DateType
override def iterator = underlying.keySet.asScala.map { k =>
k -> underlying.get(k)
}.toMap.iterator.asInstanceOf[Iterator[(String, AnyRef)]]
def save() { underlying.save() }
/**
* validate the object.
* Throws an exception if it fails
* @throws MongoException An error describing the validation failure
*/
def validate() { underlying.validate() }
def numChunks: Int = underlying.numChunks
def id = underlying.getId
def filename = Option(underlying.getFilename)
// todo - does mongo support mime magic? Should we pull some in here?
def contentType = Option(underlying.getContentType)
def length = underlying.getLength
def chunkSize = underlying.getChunkSize
def uploadDate: DateType = convertDate(underlying.get("uploadDate"))
def aliases = underlying.getAliases.asScala
def metaData: DBObject = underlying.getMetaData
def metaData_=[A <% DBObject](meta: A) = underlying.setMetaData(meta)
def md5: String = underlying.getMD5
override def toString = "{ GridFSFile(id=%s, filename=%s, contentType=%s) }".
format(id, filename, contentType)
}
@BeanInfo
class GridFSFile(_underlying: MongoGridFSFile) extends GenericGridFSFile(_underlying) {
type DateType = java.util.Date
def convertDate(in: AnyRef) = in match {
case d: java.util.Date => d
case j: DateTime => new java.util.Date(j.getMillis)
}
}
@BeanInfo
abstract class GenericGridFSDBFile protected[gridfs] (override val underlying: MongoGridFSDBFile) extends GenericGridFSFile(underlying) {
def inputStream = underlying.getInputStream
def source = scala.io.Source.fromInputStream(inputStream)
def writeTo(file: java.io.File) = underlying.writeTo(file)
def writeTo(out: java.io.OutputStream) = underlying.writeTo(out)
def writeTo(filename: String) = underlying.writeTo(filename)
override def toString = "{ GridFSDBFile(id=%s, filename=%s, contentType=%s) }".
format(id, filename, contentType)
}
@BeanInfo
class GridFSDBFile(_underlying: MongoGridFSDBFile) extends GenericGridFSDBFile(_underlying) {
type DateType = java.util.Date
def convertDate(in: AnyRef): DateType = in match {
case d: java.util.Date => d
case j: DateTime => new java.util.Date(j.getMillis)
}
}
@BeanInfo
abstract class GenericGridFSInputFile protected[gridfs] (override val underlying: MongoGridFSInputFile) extends GenericGridFSFile(underlying) {
def filename_=(name: String) = underlying.setFilename(name)
def contentType_=(cT: String) = underlying.setContentType(cT)
}
@BeanInfo
class GridFSInputFile(_underlying: MongoGridFSInputFile) extends GenericGridFSInputFile(_underlying) {
type DateType = java.util.Date
def convertDate(in: AnyRef): DateType = in match {
case d: java.util.Date => d
case j: DateTime => new java.util.Date(j.getMillis)
}
}
