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[SPARK-25345][ML] Deprecate public APIs from ImageSchema #22349

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[SPARK-25345][ML] Deprecate public APIs from ImageSchema #22349

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2397321
init pr
WeichenXu123 Sep 6, 2018
38c33da
update
WeichenXu123 Sep 6, 2018
f5a13a5
only deprecate readImage method
WeichenXu123 Sep 7, 2018
5cefd23
add py warning
WeichenXu123 Sep 8, 2018
576b7d8
address comments
WeichenXu123 Sep 8, 2018
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4 changes: 4 additions & 0 deletions mllib/src/main/scala/org/apache/spark/ml/image/ImageSchema.scala
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Expand Up @@ -198,6 +198,8 @@ object ImageSchema {
* @return DataFrame with a single column "image" of images;
* see ImageSchema for the details
*/
@deprecated("use `spark.read.format(\"image\").load(path)` and this `readImages` will be " +
"removed in 3.0.0.", "2.4.0")
def readImages(path: String): DataFrame = readImages(path, null, false, -1, false, 1.0, 0)

/**
Expand All @@ -218,6 +220,8 @@ object ImageSchema {
* @return DataFrame with a single column "image" of images;
* see ImageSchema for the details
*/
@deprecated("use `spark.read.format(\"image\").load(path)` and this `readImages` will be " +
"removed in 3.0.0.", "2.4.0")
def readImages(
path: String,
sparkSession: SparkSession,
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8 changes: 7 additions & 1 deletion python/pyspark/ml/image.py
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Expand Up @@ -25,8 +25,10 @@
"""

import sys
import warnings

import numpy as np

from pyspark import SparkContext
from pyspark.sql.types import Row, _create_row, _parse_datatype_json_string
from pyspark.sql import DataFrame, SparkSession
Expand Down Expand Up @@ -207,6 +209,9 @@ def readImages(self, path, recursive=False, numPartitions=-1,
.. note:: If sample ratio is less than 1, sampling uses a PathFilter that is efficient but
potentially non-deterministic.

.. note:: Deprecated in 2.4.0. Use `spark.read.format("image").load(path)` instead and
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@holdenk holdenk Sep 7, 2018

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Would it make sense to issue a warning when people call this code path (e.g. warnings.warn)? We do it in some of the other Python deprecated APIs but not all.

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@WeichenXu123 WeichenXu123 Sep 8, 2018

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added.

this `readImages` will be removed in 3.0.0.

:param str path: Path to the image directory.
:param bool recursive: Recursive search flag.
:param int numPartitions: Number of DataFrame partitions.
Expand All @@ -222,7 +227,8 @@ def readImages(self, path, recursive=False, numPartitions=-1,

.. versionadded:: 2.3.0
"""

warnings.warn("`ImageSchema.readImage` is deprecated. " +
"Use `spark.read.format(\"image\").load(path)` instead.", DeprecationWarning)
spark = SparkSession.builder.getOrCreate()
image_schema = spark._jvm.org.apache.spark.ml.image.ImageSchema
jsession = spark._jsparkSession
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