com.wavefront.agent.preprocessor

Class Preprocessor<T>

java.lang.Object

com.wavefront.agent.preprocessor.Preprocessor<T>

public class Preprocessor<T>
extends Object

Generic container class for storing transformation and filter rules Created by Vasily on 9/13/16.

Constructor Summary

Constructors

Constructor and Description
Preprocessor()

Method Summary

Modifier and Type	Method and Description
void	addFilter(AnnotatedPredicate<T> filter) Register a filter rule
void	addFilter(int index, AnnotatedPredicate<T> filter) Register a filter rule and place it at a specific index
void	addTransformer(com.google.common.base.Function<T,T> transformer) Register a transformation rule
void	addTransformer(int index, com.google.common.base.Function<T,T> transformer) Register a transformation rule and place it at a specific index
boolean	filter(T point) Apply all filter predicates sequentially, stop at the first "false" result
String	getLastFilterResult() Get the detailed message, if available, with the result of the last filter() operation
boolean	hasFilters() Check if any filters are registered
boolean	hasTransformers() Check if any transformation rules are registered
T	transform(T point) Apply all transformation rules sequentially

Methods inherited from class java.lang.Object

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

Constructor Detail

Preprocessor

public Preprocessor()

Method Detail

transform

public T transform(@NotNull
                   T point)

Apply all transformation rules sequentially

Parameters:

point - input point

Returns:

transformed point

filter

public boolean filter(@NotNull
                      T point)

Apply all filter predicates sequentially, stop at the first "false" result

Parameters:

point - point to apply predicates to

Returns:

true if all predicates returned "true"

hasFilters

public boolean hasFilters()

Check if any filters are registered

Returns:

true if it has at least one filter

hasTransformers

public boolean hasTransformers()

Check if any transformation rules are registered

Returns:

true if it has at least one transformer

getLastFilterResult

@Nullable
public String getLastFilterResult()

Get the detailed message, if available, with the result of the last filter() operation

Returns:

message

addTransformer

public void addTransformer(com.google.common.base.Function<T,T> transformer)

Register a transformation rule

Parameters:

transformer - rule

addFilter

public void addFilter(AnnotatedPredicate<T> filter)

Register a filter rule

Parameters:

filter - rule

addTransformer

public void addTransformer(int index,
                           com.google.common.base.Function<T,T> transformer)

Register a transformation rule and place it at a specific index

Parameters:

index - zero-based index

transformer - rule

addFilter

public void addFilter(int index,
                      AnnotatedPredicate<T> filter)

Register a filter rule and place it at a specific index

Parameters:

index - zero-based index

filter - rule