Package org.apache.drill.exec.expr

Class ClassGenerator.HoldingContainer

java.lang.Object

org.apache.drill.exec.expr.ClassGenerator.HoldingContainer

Direct Known Subclasses:

EvaluationVisitor.VectorVariableHolder

Enclosing class:

ClassGenerator<T>

public static class ClassGenerator.HoldingContainer
extends Object

Represents a (Nullable)?(Type)Holder instance. Allows code gen to declare, set, work with and retrieve values from a holder. Holders exploit scalar replacement in Drill (or in Java): that the holder can, via code rewrites, be replaced by scalars that do the same job.

Constructor Summary

Constructors

Constructor	Description
HoldingContainer(TypeProtos.MajorType t, com.sun.codemodel.JVar holder, com.sun.codemodel.JFieldRef value, com.sun.codemodel.JFieldRef isSet)
HoldingContainer(TypeProtos.MajorType t, com.sun.codemodel.JVar holder, com.sun.codemodel.JFieldRef value, com.sun.codemodel.JFieldRef isSet, boolean singularRepeated, boolean isReader)
HoldingContainer(ClassGenerator.HoldingContainer from)

Method Summary

Modifier and Type	Method	Description
com.sun.codemodel.JFieldRef	f(String name)
com.sun.codemodel.JVar	getHolder()
com.sun.codemodel.JFieldRef	getIsSet()
TypeProtos.MajorType	getMajorType()
TypeProtos.MinorType	getMinorType()
com.sun.codemodel.JFieldRef	getValue()
boolean	isConstant()
boolean	isOptional()
boolean	isReader()
boolean	isRepeated()
boolean	isSingularRepeated()
ClassGenerator.HoldingContainer	setConstant(boolean isConstant)
String	toString()	Convert holder to a string for debugging use.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Details

HoldingContainer

public HoldingContainer(TypeProtos.MajorType t,
 com.sun.codemodel.JVar holder,
 com.sun.codemodel.JFieldRef value,
 com.sun.codemodel.JFieldRef isSet)

HoldingContainer

public HoldingContainer(TypeProtos.MajorType t,
 com.sun.codemodel.JVar holder,
 com.sun.codemodel.JFieldRef value,
 com.sun.codemodel.JFieldRef isSet,
 boolean singularRepeated,
 boolean isReader)

HoldingContainer

public HoldingContainer(ClassGenerator.HoldingContainer from)

Method Details

isReader

public boolean isReader()

isSingularRepeated

public boolean isSingularRepeated()

setConstant

public ClassGenerator.HoldingContainer setConstant(boolean isConstant)

f

public com.sun.codemodel.JFieldRef f(String name)

isConstant

public boolean isConstant()

getHolder

public com.sun.codemodel.JVar getHolder()

getValue

public com.sun.codemodel.JFieldRef getValue()

getMajorType

public TypeProtos.MajorType getMajorType()

getIsSet

public com.sun.codemodel.JFieldRef getIsSet()

isOptional

public boolean isOptional()

isRepeated

public boolean isRepeated()

getMinorType

public TypeProtos.MinorType getMinorType()

toString

public String toString()

Convert holder to a string for debugging use.

Overrides:

toString in class Object