Package org.springframework.classify

Class BinaryExceptionClassifier

java.lang.Object

org.springframework.classify.SubclassClassifier<Throwable,Boolean>

org.springframework.classify.BinaryExceptionClassifier

All Implemented Interfaces:

Serializable, Classifier<Throwable,Boolean>

public class BinaryExceptionClassifier
extends SubclassClassifier<Throwable,Boolean>

A Classifier for exceptions that has only two classes (true and false). Classifies objects according to their inheritance relation with the supplied types. If the object to be classified is one of the provided types, or is a subclass of one of the types, then the non-default value is returned (usually true).

Author:

Dave Syer, Gary Russell

See Also:

• SubclassClassifier
• Serialized Form

Constructor Summary

Constructors

Constructor	Description
BinaryExceptionClassifier(boolean defaultValue)	Create a binary exception classifier with the provided default value.
BinaryExceptionClassifier(Collection<Class<? extends Throwable>> exceptionClasses)	Create a binary exception classifier with the default value false and value mapping true for the provided classes and their subclasses.
BinaryExceptionClassifier(Collection<Class<? extends Throwable>> exceptionClasses, boolean value)	Create a binary exception classifier with the provided classes and their subclasses.
BinaryExceptionClassifier(Map<Class<? extends Throwable>,Boolean> typeMap)	Create a binary exception classifier using the given classification map and a default classification of false.
BinaryExceptionClassifier(Map<Class<? extends Throwable>,Boolean> typeMap, boolean defaultValue)	Create a binary exception classifier using the given classification map and the given value for default class.
BinaryExceptionClassifier(Map<Class<? extends Throwable>,Boolean> typeMap, boolean defaultValue, boolean traverseCauses)	Create a binary exception classifier.

Method Summary

Modifier and Type	Method	Description
static BinaryExceptionClassifierBuilder	builder()
Boolean	classify(Throwable classifiable)	Return the value from the type map whose key is the class of the given Throwable, or its nearest ancestor if a subclass.
static BinaryExceptionClassifier	defaultClassifier()
void	setTraverseCauses(boolean traverseCauses)

Methods inherited from class org.springframework.classify.SubclassClassifier

add, getClassified, getDefault, setDefaultValue, setTypeMap

Methods inherited from class java.lang.Object

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

Constructor Details

BinaryExceptionClassifier

public BinaryExceptionClassifier(boolean defaultValue)

Create a binary exception classifier with the provided default value.

Parameters:

defaultValue - defaults to false

BinaryExceptionClassifier

public BinaryExceptionClassifier(Collection<Class<? extends Throwable>> exceptionClasses,
 boolean value)

Create a binary exception classifier with the provided classes and their subclasses. The mapped value for these exceptions will be the one provided (which will be the opposite of the default).

Parameters:

exceptionClasses - the exceptions to classify among

value - the value to classify

BinaryExceptionClassifier

public BinaryExceptionClassifier(Collection<Class<? extends Throwable>> exceptionClasses)

Create a binary exception classifier with the default value false and value mapping true for the provided classes and their subclasses.

Parameters:

exceptionClasses - the exception types to throw

BinaryExceptionClassifier

public BinaryExceptionClassifier(Map<Class<? extends Throwable>,Boolean> typeMap)

Create a binary exception classifier using the given classification map and a default classification of false.

Parameters:

typeMap - the map of types

BinaryExceptionClassifier

public BinaryExceptionClassifier(Map<Class<? extends Throwable>,Boolean> typeMap,
 boolean defaultValue)

Create a binary exception classifier using the given classification map and the given value for default class.

Parameters:

defaultValue - the default value to use

typeMap - the map of types to classify

BinaryExceptionClassifier

public BinaryExceptionClassifier(Map<Class<? extends Throwable>,Boolean> typeMap,
 boolean defaultValue,
 boolean traverseCauses)

Create a binary exception classifier.

Parameters:

defaultValue - the default value to use

typeMap - the map of types to classify

traverseCauses - if true, throwable's causes will be inspected to find non-default class

Method Details

builder

public static BinaryExceptionClassifierBuilder builder()

defaultClassifier

public static BinaryExceptionClassifier defaultClassifier()

setTraverseCauses

public void setTraverseCauses(boolean traverseCauses)

classify

public Boolean classify(Throwable classifiable)

Description copied from class: SubclassClassifier

Return the value from the type map whose key is the class of the given Throwable, or its nearest ancestor if a subclass.

Specified by:

classify in interface Classifier<Throwable,Boolean>

Overrides:

classify in class SubclassClassifier<Throwable,Boolean>

Parameters:

classifiable - the classifiable thing

Returns:

C the classified value