/
rows.scala
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/
rows.scala
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.spark.sql.catalyst.expressions
import org.apache.spark.sql.Row
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.types.{Decimal, DataType, StructType, AtomicType}
import org.apache.spark.unsafe.types.UTF8String
/**
* An extended interface to [[InternalRow]] that allows the values for each column to be updated.
* Setting a value through a primitive function implicitly marks that column as not null.
*/
abstract class MutableRow extends InternalRow {
def setNullAt(i: Int): Unit
def update(i: Int, value: Any)
// default implementation (slow)
def setBoolean(i: Int, value: Boolean): Unit = { update(i, value) }
def setByte(i: Int, value: Byte): Unit = { update(i, value) }
def setShort(i: Int, value: Short): Unit = { update(i, value) }
def setInt(i: Int, value: Int): Unit = { update(i, value) }
def setLong(i: Int, value: Long): Unit = { update(i, value) }
def setFloat(i: Int, value: Float): Unit = { update(i, value) }
def setDouble(i: Int, value: Double): Unit = { update(i, value) }
def setDecimal(i: Int, value: Decimal, precision: Int) { update(i, value) }
}
/**
* A row implementation that uses an array of objects as the underlying storage. Note that, while
* the array is not copied, and thus could technically be mutated after creation, this is not
* allowed.
*/
class GenericRow(protected[sql] val values: Array[Any]) extends Row {
/** No-arg constructor for serialization. */
protected def this() = this(null)
def this(size: Int) = this(new Array[Any](size))
override def length: Int = values.length
override def get(i: Int): Any = values(i)
override def toSeq: Seq[Any] = values.toSeq
override def copy(): Row = this
}
class GenericRowWithSchema(values: Array[Any], override val schema: StructType)
extends GenericRow(values) {
/** No-arg constructor for serialization. */
protected def this() = this(null, null)
override def fieldIndex(name: String): Int = schema.fieldIndex(name)
}
/**
* A internal row implementation that uses an array of objects as the underlying storage.
* Note that, while the array is not copied, and thus could technically be mutated after creation,
* this is not allowed.
*/
class GenericInternalRow(protected[sql] val values: Array[Any]) extends InternalRow {
/** No-arg constructor for serialization. */
protected def this() = this(null)
def this(size: Int) = this(new Array[Any](size))
override def genericGet(ordinal: Int): Any = values(ordinal)
override def toSeq: Seq[Any] = values
override def numFields: Int = values.length
override def copy(): InternalRow = new GenericInternalRow(values.clone())
}
/**
* This is used for serialization of Python DataFrame
*/
class GenericInternalRowWithSchema(values: Array[Any], val schema: StructType)
extends GenericInternalRow(values) {
/** No-arg constructor for serialization. */
protected def this() = this(null, null)
def fieldIndex(name: String): Int = schema.fieldIndex(name)
}
class GenericMutableRow(val values: Array[Any]) extends MutableRow {
/** No-arg constructor for serialization. */
protected def this() = this(null)
def this(size: Int) = this(new Array[Any](size))
override def genericGet(ordinal: Int): Any = values(ordinal)
override def toSeq: Seq[Any] = values
override def numFields: Int = values.length
override def setNullAt(i: Int): Unit = { values(i) = null}
override def update(i: Int, value: Any): Unit = { values(i) = value }
override def copy(): InternalRow = new GenericInternalRow(values.clone())
}