Package weka.classifiers

Class ScriptedClassifierUtils

java.lang.Object

weka.classifiers.ScriptedClassifierUtils

public class ScriptedClassifierUtils
extends Object

Helper class for managing/updating scripts of classifiers that implement ScriptedClassifier.

Author:

fracpete (fracpete at waikato dot ac dot nz)

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ScriptedClassifierUtils.InitObserver	Observer that initializes for prediction.

Constructor Summary

Constructors

Constructor	Description
ScriptedClassifierUtils()

Method Summary

Modifier and Type	Method	Description
static String	determineUniqueID(AbstractAdvancedScript script, String placeholder, boolean prefix, boolean update)	Determines the unique ID (suffix/prefix) to use in the script, if the specified placeholder for the unique ID is present.
static <T extends AbstractAdvancedScript> T	expand(T script, Actor context)	Expands flow variables and placeholders in the script.
protected static ScriptedClassifier	expand(ScriptedClassifier cls, PropertyDescriptor desc, String[] placeholders, String[] values)	Updates the placeholders with the specified values for the given property.
static ScriptedClassifier	expand(ScriptedClassifier cls, String[] placeholders, String[] values)	Replaces the placeholder with the specified value in any AbstractAdvancedScript property of the classifier.
static ScriptedClassifier	expand(ScriptedClassifier cls, String placeholder, String value)	Replaces the placeholder with the specified value in any AbstractAdvancedScript property of the classifier.
static int	initPrediction(Object obj, Actor context)	Initializes any ScriptedClassifier within the specified object.

Methods inherited from class java.lang.Object

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

Constructor Detail

ScriptedClassifierUtils

public ScriptedClassifierUtils()

Method Detail

initPrediction

public static int initPrediction(Object obj,
                                 Actor context)

Initializes any ScriptedClassifier within the specified object.

Parameters:

obj - the object to traverse

context - the context to use for initialization

Returns:

the number of initializations

determineUniqueID

public static String determineUniqueID(AbstractAdvancedScript script,
                                       String placeholder,
                                       boolean prefix,
                                       boolean update)

Determines the unique ID (suffix/prefix) to use in the script, if the specified placeholder for the unique ID is present.

Parameters:

script - the script to inspect and update

placeholder - the placeholder that triggers the unique ID generation

prefix - whether to generate prefix or suffix

update - whether to replace the placeholder with the unique ID immediately

Returns:

the generated unique ID, empty string if not required

expand

public static <T extends AbstractAdvancedScript> T expand(T script,
                                                          Actor context)

Expands flow variables and placeholders in the script.

Parameters:

script - the script to expand

context - the flow context

Returns:

the expanded script

expand

protected static ScriptedClassifier expand(ScriptedClassifier cls,
                                           PropertyDescriptor desc,
                                           String[] placeholders,
                                           String[] values)
                                    throws Exception

Updates the placeholders with the specified values for the given property.

Parameters:

cls - the classifier to update

desc - the property to update

placeholders - the placeholders to replace

values - the replacement values

Returns:

the updated classifier

Throws:

Exception - if updating fails

expand

public static ScriptedClassifier expand(ScriptedClassifier cls,
                                        String placeholder,
                                        String value)
                                 throws Exception

Replaces the placeholder with the specified value in any AbstractAdvancedScript property of the classifier.

Parameters:

cls - the classifier to update

placeholder - the placeholder to replace

value - the replacement value

Returns:

the updated classifier

Throws:

Exception - if introspection or updating of scripts fails

expand

public static ScriptedClassifier expand(ScriptedClassifier cls,
                                        String[] placeholders,
                                        String[] values)
                                 throws Exception

Replaces the placeholder with the specified value in any AbstractAdvancedScript property of the classifier.

Parameters:

cls - the classifier to update

placeholders - the placeholder to replace

values - the replacement value

Returns:

the updated classifier

Throws:

Exception - if introspection or updating of scripts fails