Scala UnsafeMapData类代码示例

本文整理汇总了Scala中org.apache.spark.sql.catalyst.expressions.UnsafeMapData类的典型用法代码示例。如果您正苦于以下问题：Scala UnsafeMapData类的具体用法？Scala UnsafeMapData怎么用？Scala UnsafeMapData使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

在下文中一共展示了UnsafeMapData类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Scala代码示例。

示例1: Of

//设置package包名称以及导入依赖的类
package org.apache.spark.orientdb.udts

import java.io.{ByteArrayInputStream, ByteArrayOutputStream, ObjectInputStream, ObjectOutputStream}

import org.apache.spark.sql.catalyst.expressions.UnsafeMapData
import org.apache.spark.sql.catalyst.util.ArrayBasedMapData
import org.apache.spark.sql.types._
import org.apache.spark.unsafe.types.UTF8String

@SQLUserDefinedType(udt = classOf[EmbeddedMapType])
case class EmbeddedMap(elements: Map[Any, Any]) extends Serializable {
  override def hashCode(): Int = 1

  override def equals(other: scala.Any): Boolean = other match {
    case that: EmbeddedMap => that.elements == this.elements
    case _ => false
  }

  override def toString: String = elements.mkString(", ")
}

class EmbeddedMapType extends UserDefinedType[EmbeddedMap] {

  override def sqlType: DataType = MapType(StringType, StringType)

  override def serialize(obj: EmbeddedMap): Any = {
    ArrayBasedMapData(obj.elements.keySet.map{ elem =>
      val outKey = new ByteArrayOutputStream()
      val osKey = new ObjectOutputStream(outKey)
      osKey.writeObject(elem)
      UTF8String.fromBytes(outKey.toByteArray)
    }.toArray,
      obj.elements.values.map{ elem =>
        val outValue = new ByteArrayOutputStream()
        val osValue = new ObjectOutputStream(outValue)
        osValue.writeObject(elem)
        UTF8String.fromBytes(outValue.toByteArray)
      }.toArray)
  }

  override def deserialize(datum: Any): EmbeddedMap = {
    datum match {
      case values: UnsafeMapData =>
        new EmbeddedMap(values.keyArray().toArray[UTF8String](StringType).map{ elem =>
          val in = new ByteArrayInputStream(elem.getBytes)
          val is = new ObjectInputStream(in)
          is.readObject()
        }.zip(values.valueArray().toArray[UTF8String](StringType).map{ elem =>
          val in = new ByteArrayInputStream(elem.getBytes)
          val is = new ObjectInputStream(in)
          is.readObject()
        }).toMap)
      case other => sys.error(s"Cannot deserialize $other")
    }
  }

  override def userClass: Class[EmbeddedMap] = classOf[EmbeddedMap]
}

object EmbeddedMapType extends EmbeddedMapType

开发者ID:orientechnologies，项目名称:spark-orientdb，代码行数:61，代码来源:EmbeddedMapType.scala

示例2: Of

//设置package包名称以及导入依赖的类
package org.apache.spark.orientdb.udts

import java.io.{ByteArrayInputStream, ByteArrayOutputStream, ObjectInputStream, ObjectOutputStream}

import com.orientechnologies.orient.core.record.ORecord
import org.apache.spark.sql.catalyst.expressions.UnsafeMapData
import org.apache.spark.sql.catalyst.util.ArrayBasedMapData
import org.apache.spark.sql.types._
import org.apache.spark.unsafe.types.UTF8String

@SQLUserDefinedType(udt = classOf[LinkMapType])
case class LinkMap(elements: Map[String, _ <: ORecord]) extends Serializable {
  override def hashCode(): Int = 1

  override def equals(other: scala.Any): Boolean = other match {
    case that: LinkMap => that.elements == this.elements
    case _ => false
  }

  override def toString: String = elements.mkString(", ")
}

class LinkMapType extends UserDefinedType[LinkMap] {

  override def sqlType: DataType = MapType(StringType, StringType)

  override def serialize(obj: LinkMap): Any = {
    ArrayBasedMapData(obj.elements.keySet.map{ elem =>
      val outKey = new ByteArrayOutputStream()
      val osKey = new ObjectOutputStream(outKey)
      osKey.writeObject(elem)
      UTF8String.fromBytes(outKey.toByteArray)
    }.toArray,
      obj.elements.values.map{ elem =>
        val outValue = new ByteArrayOutputStream()
        val osValue = new ObjectOutputStream(outValue)
        osValue.writeObject(elem)
        UTF8String.fromBytes(outValue.toByteArray)
      }.toArray)
  }

  override def deserialize(datum: Any): LinkMap = {
    datum match {
      case values: UnsafeMapData =>
        new LinkMap(values.keyArray().toArray[UTF8String](StringType).map { elem =>
          val in = new ByteArrayInputStream(elem.getBytes)
          val is = new ObjectInputStream(in)
          is.readObject().toString
        }.zip(values.valueArray().toArray[UTF8String](StringType).map { elem =>
          val in = new ByteArrayInputStream(elem.getBytes)
          val is = new ObjectInputStream(in)
          is.readObject().asInstanceOf[ORecord]
        }).toMap)
      case other => sys.error(s"Cannot deserialize $other")
    }
  }

  override def userClass: Class[LinkMap] = classOf[LinkMap]
}

object LinkMapType extends LinkMapType

开发者ID:orientechnologies，项目名称:spark-orientdb，代码行数:62，代码来源:LinkMapType.scala

注：本文中的org.apache.spark.sql.catalyst.expressions.UnsafeMapData类示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。