org.springframework.data.hadoop.config.common.annotation
Class AbstractAnnotationBuilder<O>

java.lang.Object
  org.springframework.data.hadoop.config.common.annotation.AbstractAnnotationBuilder<O>

Type Parameters:

O - the type of Object that is being built

All Implemented Interfaces:

AnnotationBuilder<O>

Direct Known Subclasses:

AbstractConfiguredAnnotationBuilder

public abstract class AbstractAnnotationBuilder<O>
extends java.lang.Object
implements AnnotationBuilder<O>

A base AnnotationBuilder that ensures the object being built is only built one time.

Author:

Rob Winch, Janne Valkealahti

Constructor Summary

AbstractAnnotationBuilder()

Method Summary

O	build() Builds the object and returns it or null.
protected abstract O	doBuild() Subclasses should implement this to perform the build.
O	getObject() Gets the object that was built.

Methods inherited from class java.lang.Object

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

Constructor Detail

AbstractAnnotationBuilder

public AbstractAnnotationBuilder()

Method Detail

build

public final O build()
              throws java.lang.Exception

Description copied from interface: AnnotationBuilder

Builds the object and returns it or null.

Specified by:

build in interface AnnotationBuilder<O>

Returns:

the Object to be built or null if the implementation allows it.

Throws:

java.lang.Exception - if an error occurred when building the Object

getObject

public final O getObject()

Gets the object that was built. If it has not been built yet an Exception is thrown.

Returns:

the Object that was built

doBuild

protected abstract O doBuild()
                      throws java.lang.Exception

Subclasses should implement this to perform the build.

Returns:

the object that should be returned by build().

Throws:

java.lang.Exception - if an error occurs