org.alfresco.repo.content.transform

Class TransformerSelectorImpl

java.lang.Object

org.alfresco.repo.content.transform.TransformerSelectorImpl

All Implemented Interfaces:

TransformerSelector

public class TransformerSelectorImpl
extends Object
implements TransformerSelector

Default transformer selector implementation, which sorts by priority and then by average transform time. The transform time is only used once a threshold (number of transforms) has been reached. This average is maintained for each source target mimetype pair.

Prior to the introduction of this class the transformation time was only kept for each transformer. There was no threshold and there was a concept of 'Explicit' transformers, which would cause all other transformers to be discarded. It is still possible to disable transformers by giving adding unsupported mappings as has been done for transformers that would not have been used in the past as there existed one or more 'explicit' transformers (a concept not used by this TransformerSelector). By default a transformer has a priority of 10. Old 'Explicit' transformers have been given a priority of 5.

Author:

Alan Davis

Constructor Summary

Constructors

Constructor and Description
TransformerSelectorImpl()

Method Summary

Modifier and Type	Method and Description
List<ContentTransformer>	selectTransformers(String sourceMimetype, long sourceSize, String targetMimetype, TransformationOptions options) Returns a sorted list of transformers that identifies the order in which transformers should be tried.
void	setContentTransformerRegistry(ContentTransformerRegistry contentTransformerRegistry)
void	setTransformerConfig(TransformerConfig transformerConfig)
void	setTransformerDebug(TransformerDebug transformerDebug)

Methods inherited from class java.lang.Object

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

Constructor Detail

TransformerSelectorImpl

public TransformerSelectorImpl()

Method Detail

setTransformerConfig

public void setTransformerConfig(TransformerConfig transformerConfig)

setContentTransformerRegistry

public void setContentTransformerRegistry(ContentTransformerRegistry contentTransformerRegistry)

setTransformerDebug

public void setTransformerDebug(TransformerDebug transformerDebug)

selectTransformers

public List<ContentTransformer> selectTransformers(String sourceMimetype,
                                                   long sourceSize,
                                                   String targetMimetype,
                                                   TransformationOptions options)

Description copied from interface: TransformerSelector

Returns a sorted list of transformers that identifies the order in which transformers should be tried.

Specified by:

selectTransformers in interface TransformerSelector

options - transformation options

Returns:

a sorted list of transformers, with the best one first.