com.intel.analytics.bigdl.example.imageclassification.RowToByteRecords.scala Maven / Gradle / Ivy
/*
* Copyright 2016 The BigDL 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 com.intel.analytics.bigdl.example.imageclassification
import com.intel.analytics.bigdl.dataset.{ByteRecord, Transformer}
import org.apache.log4j.Logger
import org.apache.spark.sql.Row
import scala.collection.Iterator
object RowToByteRecords {
val logger = Logger.getLogger(getClass)
def apply(colName: String = "data"): RowToByteRecords = {
new RowToByteRecords(colName)
}
}
/**
* transform [[Row]] to [[ByteRecord]]
* @param colName column name
*/
class RowToByteRecords(colName: String)
extends Transformer[Row, ByteRecord] {
override def apply(prev: Iterator[Row]): Iterator[ByteRecord] = {
prev.map(
img => {
ByteRecord(img.getAs[Array[Byte]](colName), -1.0f)
}
)
}
}