org.alfresco.repo.content.transform

Class AbstractContentTransformer

java.lang.Object

org.alfresco.repo.content.transform.AbstractContentTransformer

All Implemented Interfaces:

ContentWorker, ContentTransformer, org.springframework.beans.factory.Aware, org.springframework.beans.factory.BeanNameAware

Deprecated.

Deprecated since 3.0. The abstract base class org.alfresco.repo.content.transform.AbstractContentTransformer2 should now be used instead.

@Deprecated
public abstract class AbstractContentTransformer
extends Object
implements ContentTransformer, org.springframework.beans.factory.BeanNameAware

Provides basic services for ContentTransformer implementations.

This class maintains the performance measures for the transformers as well, making sure that there is an extra penalty for transformers that fail regularly.

Author:

Derek Hulley

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AbstractContentTransformer() Deprecated. All transformers start with an average transformation time of 0.0ms.

Method Summary

Modifier and Type	Method and Description
protected void	checkReliability(org.alfresco.service.cmr.repository.ContentReader reader, org.alfresco.service.cmr.repository.ContentWriter writer) Deprecated. Convenience method to check the reliability of a transformation
boolean	equals(Object obj) Deprecated.
String	getBeanName() Deprecated. Returns the Spring bean name.
protected List<ContentTransformerRegistry.TransformationKey>	getExplicitTransformations() Deprecated.
long	getMaxSourceSizeKBytes(String sourceMimetype, String targetMimetype, TransformationOptions options) Deprecated. Always returns -1 to indicate an unlimited size.
protected String	getMimetype(org.alfresco.service.cmr.repository.ContentAccessor content) Deprecated. Convenience to fetch and check the mimetype for the given content
protected org.alfresco.service.cmr.repository.MimetypeService	getMimetypeService() Deprecated.
String	getName() Deprecated. Returns transformer name.
protected abstract double	getReliability(String sourceMimetype, String targetMimetype) Deprecated. Added for backward compatibility of existing content transformers
long	getTransformationTime() Deprecated.
long	getTransformationTime(String sourceMimetype, String targetMimetype) Deprecated. Provides an estimate, usually a worst case guess, of how long a transformation will take.
int	hashCode() Deprecated.
boolean	isExplicitTransformation(String sourceMimetype, String targetMimetype, TransformationOptions options) Deprecated.
boolean	isTransformable(String sourceMimetype, long sourceSize, String targetMimetype, TransformationOptions options) Deprecated. Indicates whether the provided source mimetype can be transformed into the target mimetype with the options specified by this content transformer.
boolean	isTransformable(String sourceMimetype, String targetMimetype, TransformationOptions options) Deprecated. use version with extra sourceSize parameter.
boolean	isTransformableMimetype(String sourceMimetype, String targetMimetype, TransformationOptions options) Deprecated. Checks the supplied mimetypes are supported by calling the deprecated isTransformable(String, String, TransformationOptions) method.
boolean	isTransformableSize(String sourceMimetype, long sourceSize, String targetMimetype, TransformationOptions options) Deprecated. Always returns true to indicate size is not an issue.
protected void	recordTime(long transformationTime) Deprecated. Records and updates the average transformation time for this transformer.
void	register() Deprecated. Registers this instance with the registry if it is present.
void	setBeanName(String beanName) Deprecated. Sets the Spring bean name.
void	setExplicitTransformations(List<ContentTransformerRegistry.TransformationKey> explicitTransformations) Deprecated. Set the transformations that this transformer can do regardless of what it returns via the reliability check.
void	setMimetypeService(org.alfresco.service.cmr.repository.MimetypeService mimetypeService) Deprecated. Helper setter of the mimetype service.
void	setRegistry(ContentTransformerRegistry registry) Deprecated. The registry to auto-register with
String	toString() Deprecated.
void	transform(org.alfresco.service.cmr.repository.ContentReader reader, org.alfresco.service.cmr.repository.ContentWriter writer) Deprecated.
void	transform(org.alfresco.service.cmr.repository.ContentReader reader, org.alfresco.service.cmr.repository.ContentWriter writer, Map<String,Object> options) Deprecated. Performs the following: Times the transformation Ensures that the transformation is allowed Calls the subclass implementation of transformInternal(ContentReader, ContentWriter, Map) Transforms any exceptions generated Logs a successful transformation Subclass need only be concerned with performing the transformation.
void	transform(org.alfresco.service.cmr.repository.ContentReader reader, org.alfresco.service.cmr.repository.ContentWriter writer, TransformationOptions options) Deprecated. Transforms the content provided by the reader and source mimetype to the writer and target mimetype with the provided transformation options.
protected abstract void	transformInternal(org.alfresco.service.cmr.repository.ContentReader reader, org.alfresco.service.cmr.repository.ContentWriter writer, Map<String,Object> options) Deprecated. Method to be implemented by subclasses wishing to make use of the common infrastructural code provided by this class.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.alfresco.repo.content.transform.ContentTransformer

getComments

Constructor Detail

AbstractContentTransformer

protected AbstractContentTransformer()

Deprecated.

All transformers start with an average transformation time of 0.0ms.

Method Detail

setRegistry

public void setRegistry(ContentTransformerRegistry registry)

Deprecated.

The registry to auto-register with

Parameters:

registry - the transformer registry

setMimetypeService

public void setMimetypeService(org.alfresco.service.cmr.repository.MimetypeService mimetypeService)

Deprecated.

Helper setter of the mimetype service. This is not always required.

Parameters:

mimetypeService - MimetypeService

getMimetypeService

protected org.alfresco.service.cmr.repository.MimetypeService getMimetypeService()

Deprecated.

Returns:

Returns the mimetype helper

getExplicitTransformations

protected List<ContentTransformerRegistry.TransformationKey> getExplicitTransformations()

Deprecated.

Returns:

Returns the explicit transformations that were enabled for this transformer

setExplicitTransformations

public void setExplicitTransformations(List<ContentTransformerRegistry.TransformationKey> explicitTransformations)

Deprecated.

Set the transformations that this transformer can do regardless of what it returns via the reliability check.

Parameters:

explicitTransformations - explicit key mappings

toString

public String toString()

Deprecated.

Overrides:

toString in class Object

register

public void register()

Deprecated.

Registers this instance with the registry if it is present.

getMimetype

protected String getMimetype(org.alfresco.service.cmr.repository.ContentAccessor content)

Deprecated.

Convenience to fetch and check the mimetype for the given content

Parameters:

content - the reader/writer for the content

Returns:

Returns the mimetype for the content

Throws:

org.alfresco.error.AlfrescoRuntimeException - if the content doesn't have a mimetype

getReliability

protected abstract double getReliability(String sourceMimetype,
                                         String targetMimetype)

Deprecated.

Added for backward compatibility of existing content transformers

Parameters:

sourceMimetype - the source mimetype

targetMimetype - the target mimetype

Returns:

double the reliability value of the content transformer ranging from 0 to 1

checkReliability

protected void checkReliability(org.alfresco.service.cmr.repository.ContentReader reader,
                                org.alfresco.service.cmr.repository.ContentWriter writer)

Deprecated.

Convenience method to check the reliability of a transformation

Parameters:

reader - ContentReader

writer - ContentWriter

Throws:

org.alfresco.error.AlfrescoRuntimeException - if the reliability isn't > 0

isTransformable

public boolean isTransformable(String sourceMimetype,
                               long sourceSize,
                               String targetMimetype,
                               TransformationOptions options)

Deprecated.

Indicates whether the provided source mimetype can be transformed into the target mimetype with the options specified by this content transformer.

Implementation calls the deprecated overloaded method without the sourceSize parameter. Note: source size checked has not been added to this deprecated class.

Specified by:

isTransformable in interface ContentTransformer

Parameters:

sourceMimetype - the source mimetype

sourceSize - the size (bytes) of the source. If negative it is unknown.

targetMimetype - the target mimetype

options - the transformation options

Returns:

boolean true if this content transformer can satify the mimetypes and options specified, false otherwise

isTransformable

public boolean isTransformable(String sourceMimetype,
                               String targetMimetype,
                               TransformationOptions options)

Deprecated. use version with extra sourceSize parameter.

Specified by:

isTransformable in interface ContentTransformer

isTransformableMimetype

public boolean isTransformableMimetype(String sourceMimetype,
                                       String targetMimetype,
                                       TransformationOptions options)

Deprecated.

Checks the supplied mimetypes are supported by calling the deprecated isTransformable(String, String, TransformationOptions) method.

Specified by:

isTransformableMimetype in interface ContentTransformer

Parameters:

sourceMimetype - the source mimetype

targetMimetype - the target mimetype

options - the transformation options

Returns:

boolean true if this content transformer can satify the mimetypes, false otherwise

isTransformableSize

public boolean isTransformableSize(String sourceMimetype,
                                   long sourceSize,
                                   String targetMimetype,
                                   TransformationOptions options)

Deprecated.

Always returns true to indicate size is not an issue.

Specified by:

isTransformableSize in interface ContentTransformer

Parameters:

sourceMimetype - the source mimetype

sourceSize - the size (bytes) of the source. If negative it is unknown.

targetMimetype - the target mimetype

options - the transformation options

Returns:

boolean true if this content transformer can satify the mimetypes, false otherwise

getMaxSourceSizeKBytes

public long getMaxSourceSizeKBytes(String sourceMimetype,
                                   String targetMimetype,
                                   TransformationOptions options)

Deprecated.

Always returns -1 to indicate an unlimited size.

Specified by:

getMaxSourceSizeKBytes in interface ContentTransformer

Returns:

0 if the the transformation is disabled, -1 if there is no limit, otherwise the size in KBytes.

isExplicitTransformation

public boolean isExplicitTransformation(String sourceMimetype,
                                        String targetMimetype,
                                        TransformationOptions options)

Deprecated.

Specified by:

isExplicitTransformation in interface ContentTransformer

Parameters:

sourceMimetype - the source mimetype

targetMimetype - the target mimetype

options - the transformation options

Returns:

boolean true if it is an explicit transformation, false otherwise

See Also:

ContentTransformer.isTransformable(java.lang.String, java.lang.String, org.alfresco.service.cmr.repository.TransformationOptions)

transformInternal

protected abstract void transformInternal(org.alfresco.service.cmr.repository.ContentReader reader,
                                          org.alfresco.service.cmr.repository.ContentWriter writer,
                                          Map<String,Object> options)
                                   throws Exception

Deprecated.

Method to be implemented by subclasses wishing to make use of the common infrastructural code provided by this class.

Parameters:

reader - the source of the content to transform

writer - the target to which to write the transformed content

options - a map of options to use when performing the transformation. The map will never be null.

Throws:

Exception - exceptions will be handled by this class - subclasses can throw anything

transform

public final void transform(org.alfresco.service.cmr.repository.ContentReader reader,
                            org.alfresco.service.cmr.repository.ContentWriter writer)
                     throws org.alfresco.service.cmr.repository.ContentIOException

Deprecated.

Specified by:

transform in interface ContentTransformer

Throws:

org.alfresco.service.cmr.repository.ContentIOException

See Also:

transform(ContentReader, ContentWriter, Map), transformInternal(ContentReader, ContentWriter, Map)

transform

public final void transform(org.alfresco.service.cmr.repository.ContentReader reader,
                            org.alfresco.service.cmr.repository.ContentWriter writer,
                            TransformationOptions options)
                     throws org.alfresco.service.cmr.repository.ContentIOException

Deprecated.

Description copied from interface: ContentTransformer

Transforms the content provided by the reader and source mimetype to the writer and target mimetype with the provided transformation options.

The transformation viability can be determined by an up front call to ContentTransformer.isTransformable(String, String, TransformationOptions).

The source and target mimetypes must be available on the ContentAccessor.getMimetype() methods of both the reader and the writer.

Both reader and writer will be closed after the transformation completes.

The provided options can be null.

Specified by:

transform in interface ContentTransformer

Parameters:

reader - the source of the content

writer - the destination of the transformed content

options - transformation options, these can be null

Throws:

org.alfresco.service.cmr.repository.ContentIOException - if an IO exception occurs

See Also:

ContentTransformer.transform(org.alfresco.service.cmr.repository.ContentReader, org.alfresco.service.cmr.repository.ContentWriter, org.alfresco.service.cmr.repository.TransformationOptions)

transform

public final void transform(org.alfresco.service.cmr.repository.ContentReader reader,
                            org.alfresco.service.cmr.repository.ContentWriter writer,
                            Map<String,Object> options)
                     throws org.alfresco.service.cmr.repository.ContentIOException

Deprecated.

Performs the following:

• Times the transformation
• Ensures that the transformation is allowed
• Calls the subclass implementation of transformInternal(ContentReader, ContentWriter, Map)
• Transforms any exceptions generated
• Logs a successful transformation

Subclass need only be concerned with performing the transformation.

If the options provided are null, then an empty map will be created.

Specified by:

transform in interface ContentTransformer

Parameters:

reader - the source of the content

writer - the destination of the transformed content

options - options to pass to the transformer. These are transformer dependent and may be null.

Throws:

org.alfresco.service.cmr.repository.ContentIOException - if an IO exception occurs

getTransformationTime

public long getTransformationTime()

Deprecated.

Specified by:

getTransformationTime in interface ContentTransformer

Returns:

Returns the calculated running average of the current transformations

getTransformationTime

public long getTransformationTime(String sourceMimetype,
                                  String targetMimetype)

Deprecated.

Description copied from interface: ContentTransformer

Provides an estimate, usually a worst case guess, of how long a transformation will take. Null mimetype values provide the overall value for the transformer.

This method is used to determine, up front, which of a set of equally reliant transformers will be used for a specific transformation.

Specified by:

getTransformationTime in interface ContentTransformer

Parameters:

sourceMimetype - the source mimetype

targetMimetype - the target mimetype

Returns:

Returns the approximate number of milliseconds per transformation

recordTime

protected final void recordTime(long transformationTime)

Deprecated.

Records and updates the average transformation time for this transformer.

Subclasses should call this after every transformation in order to keep the running average of the transformation times up to date.

This method is thread-safe. The time spent in this method is negligible so the impact will be minor.

Parameters:

transformationTime - the time it took to perform the transformation. The value may be 0.

setBeanName

public void setBeanName(String beanName)

Deprecated.

Sets the Spring bean name.

Specified by:

setBeanName in interface org.springframework.beans.factory.BeanNameAware

getBeanName

public String getBeanName()

Deprecated.

Returns the Spring bean name.

getName

public String getName()

Deprecated.

Returns transformer name. Uses the Spring bean name, but if null uses the class name.

Specified by:

getName in interface ContentTransformer

hashCode

public int hashCode()

Deprecated.

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Deprecated.

Overrides:

equals in class Object