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Merge pull request #87 from TileDB-Inc/de/array_metadata
Add array metadata support
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
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| .isArray <- function(arr) is(arr, "tiledb_sparse") || is(arr, "tiledb_dense") | ||
| .assertArray <- function(arr) stopifnot(is(arr, "tiledb_sparse") || is(arr, "tiledb_dense")) | ||
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| ##' Test if TileDB Array has Metadata | ||
| ##' | ||
| ##' @param arr A TileDB Array object, or a character URI describing one | ||
| ##' @param key A character value describing a metadata key | ||
| ##' @return A logical value indicating if the given key exists in the | ||
| ##' metdata of the given array | ||
| ##' @export | ||
| tiledb_has_metadata <- function(arr, key) { | ||
| if (is.character(arr)) { | ||
| return(has_metadata_simple(arr, key)) | ||
| } else if (!.isArray(arr)) { | ||
| message("Neither (text) URI nor Array.") | ||
| return(NULL) | ||
| } | ||
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| ## Now deal with (default) case of an array object | ||
| ## Check for 'is it open' ? | ||
| if (!libtiledb_array_is_open_for_reading(arr@ptr)) { | ||
| stop("Array is not open for reading, cannot access metadata.", call.=FALSE) | ||
| } | ||
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| ## Run query | ||
| return(has_metadata_ptr(arr@ptr, key)) | ||
| } | ||
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| ##' Return count of TileDB Array Metadata objects | ||
| ##' | ||
| ##' @param arr A TileDB Array object, or a character URI describing one | ||
| ##' @return A integer variable with the number of Metadata objects | ||
| ##' @export | ||
| tiledb_num_metadata <- function(arr) { | ||
| if (is.character(arr)) { | ||
| return(num_metadata_simple(arr)) | ||
| } else if (!.isArray(arr)) { | ||
| message("Neither (text) URI nor Array.") | ||
| return(NULL) | ||
| } | ||
|
|
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| ## Now deal with (default) case of an array object | ||
| ## Check for 'is it open' ? | ||
| if (!libtiledb_array_is_open_for_reading(arr@ptr)) { | ||
| stop("Array is not open for reading, cannot access metadata.", call.=FALSE) | ||
| } | ||
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| ## Run query | ||
| return(num_metadata_ptr(arr@ptr)) | ||
| } | ||
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| ##' Return a TileDB Array Metadata object given by key | ||
| ##' | ||
| ##' @param arr A TileDB Array object, or a character URI describing one | ||
| ##' @param key A character value describing a metadata key | ||
| ##' @return A object stored in the Metadata under the given key | ||
| ##' @export | ||
| tiledb_get_metadata <- function(arr, key) { | ||
| if (is.character(arr)) { | ||
| return(get_metadata_simple(arr, key)) | ||
| } else if (!.isArray(arr)) { | ||
| message("Neither (text) URI nor Array.") | ||
| return(NULL) | ||
| } | ||
|
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| ## Now deal with (default) case of an array object | ||
| ## Check for 'is it open' ? | ||
| if (!libtiledb_array_is_open_for_reading(arr@ptr)) { | ||
| stop("Array is not open for reading, cannot access metadata.", call.=FALSE) | ||
| } | ||
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| ## Run query | ||
| return(get_metadata_ptr(arr@ptr, key)) | ||
| } | ||
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| ##' Store an object in TileDB Array Metadata under given key | ||
| ##' | ||
| ##' @param arr A TileDB Array object, or a character URI describing one | ||
| ##' @param key A character value describing a metadata key | ||
| ##' @param val An object to be store | ||
| ##' @return A boolean value indicating success | ||
| ##' @export | ||
| tiledb_put_metadata <- function(arr, key, val) { | ||
| if (is.character(arr)) { | ||
| return(put_metadata_simple(arr, key, val)) | ||
| } else if (!.isArray(arr)) { | ||
| message("Neither (text) URI nor Array.") | ||
| return(NULL) | ||
| } | ||
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| ## Now deal with (default) case of an array object | ||
| ## Check for 'is it open' ? | ||
| if (!libtiledb_array_is_open_for_writing(arr@ptr)) { | ||
| stop("Array is not open for writing, cannot access metadata.", call.=FALSE) | ||
| } | ||
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| ## Run query | ||
| return(put_metadata_ptr(arr@ptr, key, val)) | ||
| } | ||
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| ##' Return a TileDB Array Metadata object given by key | ||
| ##' | ||
| ##' @param arr A TileDB Array object, or a character URI describing one | ||
| ##' @return A object stored in the Metadata under the given key | ||
| ##' @export | ||
| tiledb_get_all_metadata <- function(arr) { | ||
| if (is.character(arr)) { | ||
| res <- get_all_metadata_simple(arr) | ||
| class(res) <- "tiledb_metadata" | ||
| return(res) | ||
| } else if (!.isArray(arr)) { | ||
| message("Neither (text) URI nor Array.") | ||
| return(NULL) | ||
| } | ||
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| ## Now deal with (default) case of an array object | ||
| ## Check for 'is it open' ? | ||
| if (!libtiledb_array_is_open_for_reading(arr@ptr)) { | ||
| stop("Array is not open for reading, cannot access metadata.", call.=FALSE) | ||
| } | ||
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| ## Run query | ||
| res <- get_all_metadata_ptr(arr@ptr) | ||
| class(res) <- "tiledb_metadata" | ||
| return(res) | ||
| } | ||
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| ##' @export | ||
| print.tiledb_metadata <- function(x, width=NULL, ...) { | ||
| nm <- names(x) | ||
| for (i in 1:length(nm)) { | ||
| cat(nm[i], ":\t", format(x[i]), "\n", sep="") | ||
| } | ||
| invisible(x) | ||
| } | ||
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| ##' Delete a TileDB Array Metadata object given by key | ||
| ##' | ||
| ##' @param arr A TileDB Array object, or a character URI describing one | ||
| ##' @param key A character value describing a metadata key | ||
| ##' @return A boolean indicating success | ||
| ##' @export | ||
| tiledb_delete_metadata <- function(arr, key) { | ||
| if (is.character(arr)) { | ||
| return(delete_metadata_simple(arr, key)) | ||
| } else if (!.isArray(arr)) { | ||
| message("Neither (text) URI nor Array.") | ||
| return(NULL) | ||
| } | ||
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| ## Now deal with (default) case of an array object | ||
| ## Check for 'is it open' ? | ||
| if (!libtiledb_array_is_open_for_writing(arr@ptr)) { | ||
| stop("Array is not open for writing, cannot access metadata.", call.=FALSE) | ||
| } | ||
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| ## Run query | ||
| return(delete_metadata_ptr(arr@ptr, key)) | ||
| } |
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