org.apache.drill.exec.expr.fn

Class AbstractFuncHolder

java.lang.Object

org.apache.drill.exec.expr.fn.AbstractFuncHolder

All Implemented Interfaces:

FuncHolder

Direct Known Subclasses:

DrillFuncHolder

public abstract class AbstractFuncHolder
extends Object
implements FuncHolder

Constructor Summary

Constructors

Constructor and Description
AbstractFuncHolder()

Method Summary

Methods

Modifier and Type	Method and Description
abstract FunctionHolderExpression	getExpr(String name, List<LogicalExpression> args, ExpressionPosition pos)
abstract int	getParamCount()
abstract TypeProtos.MajorType	getParmMajorType(int i)
boolean	isComplexWriterFuncHolder() Checks that the current function holder stores output value using field writer instead of vector holder.
boolean	isNested()
abstract ClassGenerator.HoldingContainer	renderEnd(ClassGenerator<?> classGenerator, ClassGenerator.HoldingContainer[] inputVariables, com.sun.codemodel.JVar[] workspaceJVars, FieldReference fieldReference) Generate methods body and complete the code generation.
void	renderMiddle(ClassGenerator<?> g, ClassGenerator.HoldingContainer[] inputVariables, com.sun.codemodel.JVar[] workspaceJVars)
abstract com.sun.codemodel.JVar[]	renderStart(ClassGenerator<?> g, ClassGenerator.HoldingContainer[] inputVariables)

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractFuncHolder

public AbstractFuncHolder()

Method Detail

renderStart

public abstract com.sun.codemodel.JVar[] renderStart(ClassGenerator<?> g,
                                   ClassGenerator.HoldingContainer[] inputVariables)

renderMiddle

public void renderMiddle(ClassGenerator<?> g,
                ClassGenerator.HoldingContainer[] inputVariables,
                com.sun.codemodel.JVar[] workspaceJVars)

renderEnd

public abstract ClassGenerator.HoldingContainer renderEnd(ClassGenerator<?> classGenerator,
                                        ClassGenerator.HoldingContainer[] inputVariables,
                                        com.sun.codemodel.JVar[] workspaceJVars,
                                        FieldReference fieldReference)

Generate methods body and complete the code generation.

Parameters:

classGenerator - the class responsible for code generation

inputVariables - the source of the vector holders

workspaceJVars - class fields

fieldReference - reference of the output field

Returns:

HoldingContainer for return value

isNested

public boolean isNested()

getExpr

public abstract FunctionHolderExpression getExpr(String name,
                               List<LogicalExpression> args,
                               ExpressionPosition pos)

getParmMajorType

public abstract TypeProtos.MajorType getParmMajorType(int i)

getParamCount

public abstract int getParamCount()

isComplexWriterFuncHolder

public boolean isComplexWriterFuncHolder()

Checks that the current function holder stores output value using field writer instead of vector holder.

Returns:

true if current function holder uses field writer to store the output value