eu.stratosphere.api.scala.operators.JoinOperator.scala Maven / Gradle / Ivy
/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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.
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package eu.stratosphere.api.scala.operators
import language.experimental.macros
import scala.reflect.macros.Context
import eu.stratosphere.types.Record
import eu.stratosphere.util.Collector
import eu.stratosphere.api.common.operators.Operator
import eu.stratosphere.api.java.record.operators.JoinOperator
import eu.stratosphere.api.java.record.functions.{JoinFunction => JJoinFunction}
import eu.stratosphere.api.common.operators.util.UserCodeObjectWrapper
import eu.stratosphere.configuration.Configuration;
import java.util.{ Iterator => JIterator }
import eu.stratosphere.api.scala._
import eu.stratosphere.api.scala.analysis._
import eu.stratosphere.api.scala.codegen.{MacroContextHolder, Util}
import eu.stratosphere.api.scala.functions.{JoinFunctionBase, JoinFunction, FlatJoinFunction}
class JoinDataSet[LeftIn, RightIn](val leftInput: DataSet[LeftIn], val rightInput: DataSet[RightIn]) {
def where[Key](keyFun: LeftIn => Key) = macro JoinMacros.whereImpl[LeftIn, RightIn, Key]
}
class JoinDataSetWithWhere[LeftIn, RightIn, Key](val leftKey: List[Int], val leftInput: DataSet[LeftIn], val rightInput: DataSet[RightIn]) {
def isEqualTo[Key](keyFun: RightIn => Key) = macro JoinMacros.isEqualToImpl[LeftIn, RightIn, Key]
}
class JoinDataSetWithWhereAndEqual[LeftIn, RightIn](val leftKey: List[Int], val rightKey: List[Int], val leftInput: DataSet[LeftIn], val rightInput: DataSet[RightIn]) {
def map[Out](fun: (LeftIn, RightIn) => Out): DataSet[Out] with TwoInputHintable[LeftIn, RightIn, Out] = macro JoinMacros.map[LeftIn, RightIn, Out]
def flatMap[Out](fun: (LeftIn, RightIn) => Iterator[Out]): DataSet[Out] with TwoInputHintable[LeftIn, RightIn, Out] = macro JoinMacros.flatMap[LeftIn, RightIn, Out]
def filter(fun: (LeftIn, RightIn) => Boolean): DataSet[(LeftIn, RightIn)] with TwoInputHintable[LeftIn, RightIn, (LeftIn, RightIn)] = macro JoinMacros.filter[LeftIn, RightIn]
}
class NoKeyMatchBuilder(s: JJoinFunction) extends JoinOperator.Builder(new UserCodeObjectWrapper(s))
object JoinMacros {
def whereImpl[LeftIn: c.WeakTypeTag, RightIn: c.WeakTypeTag, Key: c.WeakTypeTag](c: Context { type PrefixType = JoinDataSet[LeftIn, RightIn] })(keyFun: c.Expr[LeftIn => Key]): c.Expr[JoinDataSetWithWhere[LeftIn, RightIn, Key]] = {
import c.universe._
val slave = MacroContextHolder.newMacroHelper(c)
val keySelection = slave.getSelector(keyFun)
val helper = reify {
val helper = c.prefix.splice
new JoinDataSetWithWhere[LeftIn, RightIn, Key](keySelection.splice, helper.leftInput, helper.rightInput)
}
return helper
}
def isEqualToImpl[LeftIn: c.WeakTypeTag, RightIn: c.WeakTypeTag, Key: c.WeakTypeTag](c: Context { type PrefixType = JoinDataSetWithWhere[LeftIn, RightIn, Key] })(keyFun: c.Expr[RightIn => Key]): c.Expr[JoinDataSetWithWhereAndEqual[LeftIn, RightIn]] = {
import c.universe._
val slave = MacroContextHolder.newMacroHelper(c)
val keySelection = slave.getSelector(keyFun)
val helper = reify {
val helper = c.prefix.splice
new JoinDataSetWithWhereAndEqual[LeftIn, RightIn](helper.leftKey, keySelection.splice, helper.leftInput, helper.rightInput)
}
return helper
}
def map[LeftIn: c.WeakTypeTag, RightIn: c.WeakTypeTag, Out: c.WeakTypeTag](c: Context { type PrefixType = JoinDataSetWithWhereAndEqual[LeftIn, RightIn] })(fun: c.Expr[(LeftIn, RightIn) => Out]): c.Expr[DataSet[Out] with TwoInputHintable[LeftIn, RightIn, Out]] = {
import c.universe._
val slave = MacroContextHolder.newMacroHelper(c)
val (udtLeftIn, createUdtLeftIn) = slave.mkUdtClass[LeftIn]
val (udtRightIn, createUdtRightIn) = slave.mkUdtClass[RightIn]
val (udtOut, createUdtOut) = slave.mkUdtClass[Out]
val stub: c.Expr[JoinFunctionBase[LeftIn, RightIn, Out]] = if (fun.actualType <:< weakTypeOf[JoinFunction[LeftIn, RightIn, Out]])
reify { fun.splice.asInstanceOf[JoinFunctionBase[LeftIn, RightIn, Out]] }
else reify {
implicit val leftInputUDT: UDT[LeftIn] = c.Expr[UDT[LeftIn]](createUdtLeftIn).splice
implicit val rightInputUDT: UDT[RightIn] = c.Expr[UDT[RightIn]](createUdtRightIn).splice
implicit val outputUDT: UDT[Out] = c.Expr[UDT[Out]](createUdtOut).splice
new JoinFunctionBase[LeftIn, RightIn, Out] {
override def join(leftRecord: Record, rightRecord: Record, out: Collector[Record]) = {
val left = leftDeserializer.deserializeRecyclingOn(leftRecord)
val right = rightDeserializer.deserializeRecyclingOn(rightRecord)
val output = fun.splice.apply(left, right)
leftRecord.setNumFields(outputLength)
for (field <- leftDiscard)
leftRecord.setNull(field)
leftRecord.copyFrom(rightRecord, rightForwardFrom, rightForwardTo)
leftRecord.copyFrom(leftRecord, leftForwardFrom, leftForwardTo)
serializer.serialize(output, leftRecord)
out.collect(leftRecord)
}
}
}
val contract = reify {
val helper: JoinDataSetWithWhereAndEqual[LeftIn, RightIn] = c.prefix.splice
val leftInput = helper.leftInput.contract
val rightInput = helper.rightInput.contract
val generatedStub = ClosureCleaner.clean(stub.splice)
val leftKeySelector = new FieldSelector(generatedStub.leftInputUDT, helper.leftKey)
val rightKeySelector = new FieldSelector(generatedStub.rightInputUDT, helper.rightKey)
val builder = new NoKeyMatchBuilder(generatedStub).input1(leftInput).input2(rightInput)
val leftKeyPositions = leftKeySelector.selectedFields.toIndexArray
val rightKeyPositions = rightKeySelector.selectedFields.toIndexArray
val keyTypes = generatedStub.leftInputUDT.getKeySet(leftKeyPositions)
// global indexes haven't been computed yet...
0 until keyTypes.size foreach { i => builder.keyField(keyTypes(i), leftKeyPositions(i), rightKeyPositions(i)) }
val ret = new JoinOperator(builder) with TwoInputKeyedScalaOperator[LeftIn, RightIn, Out] {
override val leftKey: FieldSelector = leftKeySelector
override val rightKey: FieldSelector = rightKeySelector
override def getUDF = generatedStub.udf
override def annotations = Seq(
Annotations.getConstantFieldsFirst(
Util.filterNonForwards(getUDF.getLeftForwardIndexArrayFrom, getUDF.getLeftForwardIndexArrayTo)),
Annotations.getConstantFieldsSecond(
Util.filterNonForwards(getUDF.getRightForwardIndexArrayFrom, getUDF.getRightForwardIndexArrayTo)))
}
new DataSet[Out](ret) with TwoInputHintable[LeftIn, RightIn, Out] {}
}
val result = c.Expr[DataSet[Out] with TwoInputHintable[LeftIn, RightIn, Out]](Block(List(udtLeftIn, udtRightIn, udtOut), contract.tree))
return result
}
def flatMap[LeftIn: c.WeakTypeTag, RightIn: c.WeakTypeTag, Out: c.WeakTypeTag](c: Context { type PrefixType = JoinDataSetWithWhereAndEqual[LeftIn, RightIn] })(fun: c.Expr[(LeftIn, RightIn) => Iterator[Out]]): c.Expr[DataSet[Out] with TwoInputHintable[LeftIn, RightIn, Out]] = {
import c.universe._
val slave = MacroContextHolder.newMacroHelper(c)
val (udtLeftIn, createUdtLeftIn) = slave.mkUdtClass[LeftIn]
val (udtRightIn, createUdtRightIn) = slave.mkUdtClass[RightIn]
val (udtOut, createUdtOut) = slave.mkUdtClass[Out]
val stub: c.Expr[JoinFunctionBase[LeftIn, RightIn, Out]] = if (fun.actualType <:< weakTypeOf[JoinFunction[LeftIn, RightIn, Out]])
reify { fun.splice.asInstanceOf[JoinFunctionBase[LeftIn, RightIn, Out]] }
else reify {
implicit val leftInputUDT: UDT[LeftIn] = c.Expr[UDT[LeftIn]](createUdtLeftIn).splice
implicit val rightInputUDT: UDT[RightIn] = c.Expr[UDT[RightIn]](createUdtRightIn).splice
implicit val outputUDT: UDT[Out] = c.Expr[UDT[Out]](createUdtOut).splice
new JoinFunctionBase[LeftIn, RightIn, Out] {
override def join(leftRecord: Record, rightRecord: Record, out: Collector[Record]) = {
val left = leftDeserializer.deserializeRecyclingOn(leftRecord)
val right = rightDeserializer.deserializeRecyclingOn(rightRecord)
val output = fun.splice.apply(left, right)
if (output.nonEmpty) {
leftRecord.setNumFields(outputLength)
for (field <- leftDiscard)
leftRecord.setNull(field)
leftRecord.copyFrom(rightRecord, rightForwardFrom, rightForwardTo)
leftRecord.copyFrom(leftRecord, leftForwardFrom, leftForwardTo)
for (item <- output) {
serializer.serialize(item, leftRecord)
out.collect(leftRecord)
}
}
}
}
}
val contract = reify {
val helper: JoinDataSetWithWhereAndEqual[LeftIn, RightIn] = c.prefix.splice
val leftInput = helper.leftInput.contract
val rightInput = helper.rightInput.contract
val generatedStub = ClosureCleaner.clean(stub.splice)
val leftKeySelector = new FieldSelector(generatedStub.leftInputUDT, helper.leftKey)
val rightKeySelector = new FieldSelector(generatedStub.rightInputUDT, helper.rightKey)
val builder = new NoKeyMatchBuilder(generatedStub).input1(leftInput).input2(rightInput)
val leftKeyPositions = leftKeySelector.selectedFields.toIndexArray
val rightKeyPositions = rightKeySelector.selectedFields.toIndexArray
val keyTypes = generatedStub.leftInputUDT.getKeySet(leftKeyPositions)
// global indexes haven't been computed yet...
0 until keyTypes.size foreach { i => builder.keyField(keyTypes(i), leftKeyPositions(i), rightKeyPositions(i)) }
val ret = new JoinOperator(builder) with TwoInputKeyedScalaOperator[LeftIn, RightIn, Out] {
override val leftKey: FieldSelector = leftKeySelector
override val rightKey: FieldSelector = rightKeySelector
override def getUDF = generatedStub.udf
override def annotations = Seq(
Annotations.getConstantFieldsFirst(
Util.filterNonForwards(getUDF.getLeftForwardIndexArrayFrom, getUDF.getLeftForwardIndexArrayTo)),
Annotations.getConstantFieldsSecond(
Util.filterNonForwards(getUDF.getRightForwardIndexArrayFrom, getUDF.getRightForwardIndexArrayTo)))
}
new DataSet[Out](ret) with TwoInputHintable[LeftIn, RightIn, Out] {}
}
val result = c.Expr[DataSet[Out] with TwoInputHintable[LeftIn, RightIn, Out]](Block(List(udtLeftIn, udtRightIn, udtOut), contract.tree))
return result
}
def filter[LeftIn: c.WeakTypeTag, RightIn: c.WeakTypeTag](c: Context { type PrefixType = JoinDataSetWithWhereAndEqual[LeftIn, RightIn] })(fun: c.Expr[(LeftIn, RightIn) => Boolean]): c.Expr[DataSet[(LeftIn, RightIn)] with TwoInputHintable[LeftIn, RightIn, (LeftIn, RightIn)]] = {
import c.universe._
val slave = MacroContextHolder.newMacroHelper(c)
val (udtLeftIn, createUdtLeftIn) = slave.mkUdtClass[LeftIn]
val (udtRightIn, createUdtRightIn) = slave.mkUdtClass[RightIn]
val (udtOut, createUdtOut) = slave.mkUdtClass[(LeftIn, RightIn)]
val stub: c.Expr[JoinFunctionBase[LeftIn, RightIn, (LeftIn, RightIn)]] = if (fun.actualType <:< weakTypeOf[JoinFunction[LeftIn, RightIn, (LeftIn, RightIn)]])
reify { fun.splice.asInstanceOf[JoinFunctionBase[LeftIn, RightIn, (LeftIn, RightIn)]] }
else reify {
implicit val leftInputUDT: UDT[LeftIn] = c.Expr[UDT[LeftIn]](createUdtLeftIn).splice
implicit val rightInputUDT: UDT[RightIn] = c.Expr[UDT[RightIn]](createUdtRightIn).splice
implicit val outputUDT: UDT[(LeftIn, RightIn)] = c.Expr[UDT[(LeftIn, RightIn)]](createUdtOut).splice
new JoinFunctionBase[LeftIn, RightIn, (LeftIn, RightIn)] {
override def join(leftRecord: Record, rightRecord: Record, out: Collector[Record]) = {
val left = leftDeserializer.deserializeRecyclingOn(leftRecord)
val right = rightDeserializer.deserializeRecyclingOn(rightRecord)
if (fun.splice.apply(left, right)) {
val output = (left, right)
leftRecord.setNumFields(outputLength)
serializer.serialize(output, leftRecord)
out.collect(leftRecord)
}
}
}
}
val contract = reify {
val helper: JoinDataSetWithWhereAndEqual[LeftIn, RightIn] = c.prefix.splice
val leftInput = helper.leftInput.contract
val rightInput = helper.rightInput.contract
val generatedStub = ClosureCleaner.clean(stub.splice)
val leftKeySelector = new FieldSelector(generatedStub.leftInputUDT, helper.leftKey)
val rightKeySelector = new FieldSelector(generatedStub.rightInputUDT, helper.rightKey)
val builder = new NoKeyMatchBuilder(generatedStub).input1(leftInput).input2(rightInput)
val leftKeyPositions = leftKeySelector.selectedFields.toIndexArray
val rightKeyPositions = rightKeySelector.selectedFields.toIndexArray
val keyTypes = generatedStub.leftInputUDT.getKeySet(leftKeyPositions)
// global indexes haven't been computed yet...
0 until keyTypes.size foreach { i => builder.keyField(keyTypes(i), leftKeyPositions(i), rightKeyPositions(i)) }
val ret = new JoinOperator(builder) with TwoInputKeyedScalaOperator[LeftIn, RightIn, (LeftIn, RightIn)] {
override val leftKey: FieldSelector = leftKeySelector
override val rightKey: FieldSelector = rightKeySelector
override def getUDF = generatedStub.udf
override def annotations = Seq(
Annotations.getConstantFieldsFirst(
Util.filterNonForwards(getUDF.getLeftForwardIndexArrayFrom, getUDF.getLeftForwardIndexArrayTo)),
Annotations.getConstantFieldsSecond(
Util.filterNonForwards(getUDF.getRightForwardIndexArrayFrom, getUDF.getRightForwardIndexArrayTo)))
}
new DataSet[(LeftIn, RightIn)](ret) with TwoInputHintable[LeftIn, RightIn, (LeftIn, RightIn)] {}
}
val result = c.Expr[DataSet[(LeftIn, RightIn)] with TwoInputHintable[LeftIn, RightIn, (LeftIn, RightIn)]](Block(List(udtLeftIn, udtRightIn, udtOut), contract.tree))
return result
}
}
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