org.apache.drill.exec.compile

Class ExampleTemplateWithInner

java.lang.Object

org.apache.drill.exec.compile.ExampleTemplateWithInner

All Implemented Interfaces:

ExampleInner

public abstract class ExampleTemplateWithInner
extends Object
implements ExampleInner

Test case that also illustrates the proper construction of templates with nested classes.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
class	ExampleTemplateWithInner.TheInnerClass Nested classes can be static or non-static "inner" classes.

Constructor Summary

Constructors

Constructor and Description
ExampleTemplateWithInner()

Method Summary

Modifier and Type	Method and Description
void	doInsideOutside()
abstract void	doOutside() Outer class methods can be abstract.
protected ExampleTemplateWithInner.TheInnerClass	injectMembers(ExampleTemplateWithInner.TheInnerClass theInnerClass)
protected ExampleTemplateWithInner.TheInnerClass	newTheInnerClass() The byte-code merge mechanism will replace in-line calls to new TheInnerClass with a call to create the generated inner class.

Methods inherited from class java.lang.Object

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

Constructor Detail

ExampleTemplateWithInner

public ExampleTemplateWithInner()

Method Detail

doOutside

public abstract void doOutside()
                        throws SchemaChangeException

Outer class methods can be abstract. The generated methods replace (code merge) or override (plain-old Java) this method.

Specified by:

doOutside in interface ExampleInner

Throws:

SchemaChangeException

doInsideOutside

public void doInsideOutside()
                     throws SchemaChangeException

Specified by:

doInsideOutside in interface ExampleInner

Throws:

SchemaChangeException

newTheInnerClass

protected ExampleTemplateWithInner.TheInnerClass newTheInnerClass()

The byte-code merge mechanism will replace in-line calls to new TheInnerClass with a call to create the generated inner class. But, plain-old Java can only override methods. The code generator will create a method of the form newInnerClassName to create the generated inner class, which is subclass of the template inner class. The byte-code transform technique rewrites this method to create the generated inner class directly

Returns:

an instance of the inner class, at runtime the generated subclass (or replacement) of the template inner class

injectMembers

protected ExampleTemplateWithInner.TheInnerClass injectMembers(ExampleTemplateWithInner.TheInnerClass theInnerClass)