-source("./R/util.R")
+# Copyright (C) The Arvados Authors. All rights reserved.
+#
+# SPDX-License-Identifier: Apache-2.0
-#' ArvadosFile Object
+#' ArvadosFile
#'
-#' Update description
+#' ArvadosFile class represents a file inside Arvados collection.
#'
-#' @export ArvadosFile
+#' @section Usage:
+#' \preformatted{file = ArvadosFile$new(name)}
+#'
+#' @section Arguments:
+#' \describe{
+#' \item{name}{Name of the file.}
+#' }
+#'
+#' @section Methods:
+#' \describe{
+#' \item{getName()}{Returns name of the file.}
+#' \item{getRelativePath()}{Returns file path relative to the root.}
+#' \item{read(contentType = "raw", offset = 0, length = 0)}{Read file content.}
+#' \item{write(content, contentType = "text/html")}{Write to file (override current content of the file).}
+#' \item{connection(rw)}{Get connection opened in "read" or "write" mode.}
+#' \item{flush()}{Write connections content to a file (override current content of the file).}
+#' \item{remove(name)}{Removes ArvadosFile or Subcollection specified by name from the subcollection.}
+#' \item{getSizeInBytes()}{Returns file size in bytes.}
+#' \item{move(destination)}{Moves file to a new location inside collection.}
+#' \item{copy(destination)}{Copies file to a new location inside collection.}
+#' }
+#'
+#' @name ArvadosFile
+#' @examples
+#' \dontrun{
+#' myFile <- ArvadosFile$new("myFile")
+#'
+#' myFile$write("This is new file content")
+#' fileContent <- myFile$read()
+#' fileContent <- myFile$read("text")
+#' fileContent <- myFile$read("raw", offset = 8, length = 4)
+#'
+#' #Write a table:
+#' arvConnection <- myFile$connection("w")
+#' write.table(mytable, arvConnection)
+#' arvadosFile$flush()
+#'
+#' #Read a table:
+#' arvConnection <- myFile$connection("r")
+#' mytable <- read.table(arvConnection)
+#'
+#' myFile$move("newFolder/myFile")
+#' myFile$copy("newFolder/myFile")
+#' }
+NULL
+
+#' @export
ArvadosFile <- R6::R6Class(
"ArvadosFile",
initialize = function(name)
{
- private$name <- name
- private$http <- HttpRequest$new()
- private$httpParser <- HttpParser$new()
+ if(name == "")
+ stop("Invalid name.")
+
+ private$name <- name
},
getName = function() private$name,
REST <- private$collection$getRESTService()
- fileSize <- REST$getResourceSize(private$collection$uuid,
- self$getRelativePath())
-
+ fileSize <- REST$getResourceSize(self$getRelativePath(),
+ private$collection$uuid)
fileSize
},
getCollection = function() private$collection,
- setCollection = function(collection)
+ setCollection = function(collection, setRecursively = TRUE)
{
private$collection <- collection
},
REST <- private$collection$getRESTService()
- REST$read(private$collection$uuid,
- self$getRelativePath(),
- contentType, offset, length)
+ fileContent <- REST$read(self$getRelativePath(),
+ private$collection$uuid,
+ contentType, offset, length)
+ fileContent
},
connection = function(rw)
{
- if (rw == "r")
+ if (rw == "r" || rw == "rb")
{
- return(textConnection(self$read("text")))
+ REST <- private$collection$getRESTService()
+ return(REST$getConnection(self$getRelativePath(),
+ private$collection$uuid,
+ rw))
}
- else if (rw == "w")
+ else if (rw == "w")
{
private$buffer <- textConnection(NULL, "w")
}
},
- flush = function()
+ flush = function()
{
v <- textConnectionValue(private$buffer)
close(private$buffer)
REST <- private$collection$getRESTService()
- result <- REST$write(private$collection$uuid,
- self$getRelativePath(),
- content, contentType)
+ writeResult <- REST$write(self$getRelativePath(),
+ private$collection$uuid,
+ content, contentType)
+ writeResult
},
- move = function(newLocationInCollection)
+ move = function(destination)
{
if(is.null(private$collection))
- stop("ArvadosFile doesn't belong to any collection")
+ stop("ArvadosFile doesn't belong to any collection.")
- newLocationInCollection <- trimFromEnd(newLocationInCollection, "/")
- newParentLocation <- trimFromEnd(newLocationInCollection, private$name)
+ destination <- trimFromEnd(destination, "/")
+ nameAndPath <- splitToPathAndName(destination)
- newParent <- private$collection$get(newParentLocation)
+ newParent <- private$collection$get(nameAndPath$path)
if(is.null(newParent))
- {
- stop("Unable to get destination subcollection")
- }
+ stop("Unable to get destination subcollection.")
- childWithSameName <- newParent$get(private$name)
+ childWithSameName <- newParent$get(nameAndPath$name)
if(!is.null(childWithSameName))
stop("Destination already contains content with same name.")
REST <- private$collection$getRESTService()
REST$move(self$getRelativePath(),
- paste0(newParent$getRelativePath(), "/", self$getName()),
+ paste0(newParent$getRelativePath(), "/", nameAndPath$name),
private$collection$uuid)
private$dettachFromCurrentParent()
- private$attachToNewParent(newParent)
+ private$attachToNewParent(self, newParent)
+
+ private$parent <- newParent
+ private$name <- nameAndPath$name
+
+ self
+ },
+
+ copy = function(destination)
+ {
+ if(is.null(private$collection))
+ stop("ArvadosFile doesn't belong to any collection.")
+
+ destination <- trimFromEnd(destination, "/")
+ nameAndPath <- splitToPathAndName(destination)
+
+ newParent <- private$collection$get(nameAndPath$path)
- "Content moved successfully."
+ if(is.null(newParent))
+ stop("Unable to get destination subcollection.")
+
+ childWithSameName <- newParent$get(nameAndPath$name)
+
+ if(!is.null(childWithSameName))
+ stop("Destination already contains content with same name.")
+
+ REST <- private$collection$getRESTService()
+ REST$copy(self$getRelativePath(),
+ paste0(newParent$getRelativePath(), "/", nameAndPath$name),
+ private$collection$uuid)
+
+ newFile <- self$duplicate(nameAndPath$name)
+ newFile$setCollection(self$getCollection())
+ private$attachToNewParent(newFile, newParent)
+ newFile$setParent(newParent)
+
+ newFile
+ },
+
+ duplicate = function(newName = NULL)
+ {
+ name <- if(!is.null(newName)) newName else private$name
+ newFile <- ArvadosFile$new(name)
+ newFile
}
),
size = NULL,
parent = NULL,
collection = NULL,
- http = NULL,
- httpParser = NULL,
buffer = NULL,
- attachToNewParent = function(newParent)
+ attachToNewParent = function(content, newParent)
{
- #Note: We temporary set parents collection to NULL. This will ensure that
- # add method doesn't post file on REST.
+ # We temporary set parents collection to NULL. This will ensure that
+ # add method doesn't post this file on REST.
+ # We also need to set content's collection to NULL because
+ # add method throws exception if we try to add content that already
+ # belongs to a collection.
parentsCollection <- newParent$getCollection()
+ content$setCollection(NULL, setRecursively = FALSE)
newParent$setCollection(NULL, setRecursively = FALSE)
-
- newParent$add(self)
-
+ newParent$add(content)
+ content$setCollection(parentsCollection, setRecursively = FALSE)
newParent$setCollection(parentsCollection, setRecursively = FALSE)
-
- private$parent <- newParent
},
dettachFromCurrentParent = function()
{
- #Note: We temporary set parents collection to NULL. This will ensure that
- # remove method doesn't remove this subcollection from REST.
+ # We temporary set parents collection to NULL. This will ensure that
+ # remove method doesn't remove this file from REST.
parent <- private$parent
parentsCollection <- parent$getCollection()
parent$setCollection(NULL, setRecursively = FALSE)
-
parent$remove(private$name)
-
parent$setCollection(parentsCollection, setRecursively = FALSE)
}
),
cloneable = FALSE
)
+
+#' print.ArvadosFile
+#'
+#' Custom print function for ArvadosFile class
+#'
+#' @param x Instance of ArvadosFile class
+#' @param ... Optional arguments.
+#' @export
+print.ArvadosFile = function(x, ...)
+{
+ collection <- NULL
+ relativePath <- x$getRelativePath()
+
+ if(!is.null(x$getCollection()))
+ {
+ collection <- x$getCollection()$uuid
+ relativePath <- paste0("/", relativePath)
+ }
+
+ cat(paste0("Type: ", "\"", "ArvadosFile", "\""), sep = "\n")
+ cat(paste0("Name: ", "\"", x$getName(), "\""), sep = "\n")
+ cat(paste0("Relative path: ", "\"", relativePath, "\""), sep = "\n")
+ cat(paste0("Collection: ", "\"", collection, "\""), sep = "\n")
+}
projects / arvados.git / blobdiff