er.attachment.processors
Class ERAttachmentProcessor<T extends ERAttachment>

java.lang.Object
  er.attachment.processors.ERAttachmentProcessor<T>

Type Parameters:

T - the type of ERAttachment that this processor processes

Direct Known Subclasses:

ERDatabaseAttachmentProcessor, ERFileAttachmentProcessor, ERS3AttachmentProcessor

public abstract class ERAttachmentProcessor<T extends ERAttachment>
extends java.lang.Object

ERAttachmentProcessors provide the implementation of the communication with the attachment storage method, including import, URL generation, and stream generation.

ERAttachmentProcessors also provide support for path template variables. Read the er.attachment package.html for more information.

Author:

mschrag

Properties

er.attachment.maxSize	the maximum size of an uploaded attachment
er.attachment.[configurationName].maxSize	the maximum size of an uploaded attachment
er.attachment.[configurationName].storageType	er.attachment.[configurationName].storageType
er.attachment.storageType	er.attachment.storageType
er.attachment.[configurationName].proxyAsAttachment	er.attachment.[configurationName].proxyAsAttachment
er.attachment.proxyAsAttachment	er.attachment.proxyAsAttachment

Nested Class Summary

static class

ERAttachmentProcessor.ERXAttachmentExceedsLengthException ERXAttachmentExceedsLengthException thrown when an attachment exceeds the maximum attachment size.

Field Summary

static org.apache.log4j.Logger

log

Constructor Summary

ERAttachmentProcessor()

Method Summary

protected static java.lang.String	_parsePathTemplate(ERAttachment attachment, java.lang.String templatePath, java.lang.String recommendedFileName) Parses a path template with ${ext}, ${fileName}, ${hash}, ${uuid}, and ${pk} variables in it.
abstract T	_process(com.webobjects.eocontrol.EOEditingContext editingContext, java.io.File uploadedFile, java.lang.String recommendedFileName, java.lang.String mimeType, java.lang.String configurationName, java.lang.String ownerID, boolean pendingDelete) Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it.
static void	addAttachmentProcessorForType(ERAttachmentProcessor<?> processor, java.lang.String storageType) Adds a new attachment processor for the given storage type.
abstract java.io.InputStream	attachmentInputStream(T attachment) Returns an InputStream to the data of the given attachment.
void	attachmentInserted(T attachment) Called after an attachment has been inserted (from didInsert).
abstract java.lang.String	attachmentUrl(T attachment, com.webobjects.appserver.WORequest request, com.webobjects.appserver.WOContext context) Returns a URL to the attachment's data.
IERAttachmentProcessorDelegate	delegate() Returns the attachment processor delegate for this processor.
abstract void	deleteAttachment(T attachment) Deletes the attachment from the data store.
T	process(com.webobjects.eocontrol.EOEditingContext editingContext, ERPendingAttachment pendingAttachment) Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it.
T	process(com.webobjects.eocontrol.EOEditingContext editingContext, java.io.File uploadedFile) Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it.
T	process(com.webobjects.eocontrol.EOEditingContext editingContext, java.io.File uploadedFile, java.lang.String recommendedFilePath) Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it.
T	process(com.webobjects.eocontrol.EOEditingContext editingContext, java.io.File uploadedFile, java.lang.String recommendedFilePath, java.lang.String mimeType) Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it.
T	process(com.webobjects.eocontrol.EOEditingContext editingContext, java.io.File uploadedFile, java.lang.String recommendedFilePath, java.lang.String mimeType, int width, int height, java.lang.String configurationName, java.lang.String ownerID) Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it.
T	process(com.webobjects.eocontrol.EOEditingContext editingContext, java.io.File uploadedFile, java.lang.String recommendedFilePath, java.lang.String mimeType, java.lang.String configurationName, java.lang.String ownerID) Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it.
static <T extends ERAttachment> ERAttachmentProcessor<T>	processorForConfigurationName(java.lang.String configurationName) Returns the processor that corresponds to the given configuration name ("s3", "db", "file", etc).
static <T extends ERAttachment> ERAttachmentProcessor<T>	processorForType(java.lang.String storageType) Returns the processor that corresponds to the given storage type ("s3", "db", "file", etc).
static <T extends ERAttachment> ERAttachmentProcessor<T>	processorForType(T attachment) Returns the processor that corresponds to the given attachment.
static com.webobjects.foundation.NSMutableDictionary<java.lang.String,ERAttachmentProcessor<?>>	processors() Returns all of the processors mapped by storageType.
protected java.lang.String	proxiedUrl(T attachment, com.webobjects.appserver.WOContext context) Returns a URL to the given attachment that routes via the ERAttachmentRequestHandler.
boolean	proxyAsAttachment(T attachment) Returns whether or not the proxy request handler should return this as an attachment with a Content-Disposition.
void	setDelegate(IERAttachmentProcessorDelegate delegate) Sets the attachment processor delegate for this processor.

Methods inherited from class java.lang.Object

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

Field Detail

log

public static final org.apache.log4j.Logger log

Constructor Detail

ERAttachmentProcessor

public ERAttachmentProcessor()

Method Detail

processors

public static com.webobjects.foundation.NSMutableDictionary<java.lang.String,ERAttachmentProcessor<?>> processors()

Returns all of the processors mapped by storageType.

Returns:

all of the processors mapped by storageType

processorForType

public static <T extends ERAttachment> ERAttachmentProcessor<T> processorForType(T attachment)

Returns the processor that corresponds to the given attachment.

Type Parameters:

T - the attachment type

Parameters:

attachment - the attachment to lookup a processor for

Returns:

the attachment's processor

processorForType

public static <T extends ERAttachment> ERAttachmentProcessor<T> processorForType(java.lang.String storageType)

Returns the processor that corresponds to the given storage type ("s3", "db", "file", etc).

Parameters:

storageType - the type of processor to lookup

Returns:

the storage type's processor

processorForConfigurationName

public static <T extends ERAttachment> ERAttachmentProcessor<T> processorForConfigurationName(java.lang.String configurationName)

Returns the processor that corresponds to the given configuration name ("s3", "db", "file", etc).

Parameters:

configurationName - the configuration name to use to lookup the default storage type

Returns:

the storage type's processor

addAttachmentProcessorForType

public static void addAttachmentProcessorForType(ERAttachmentProcessor<?> processor,
                                                 java.lang.String storageType)

Adds a new attachment processor for the given storage type.

Parameters:

processor - the processor

storageType - the storage type that corresponds to the processor

_parsePathTemplate

protected static java.lang.String _parsePathTemplate(ERAttachment attachment,
                                                     java.lang.String templatePath,
                                                     java.lang.String recommendedFileName)

Parses a path template with ${ext}, ${fileName}, ${hash}, ${uuid}, and ${pk} variables in it. See the ERAttachment top level documentation for more information.

Parameters:

attachment - the attachment being processed

templatePath - the template path definition

recommendedFileName - the original file name recommended by the uploading user

setDelegate

public void setDelegate(IERAttachmentProcessorDelegate delegate)

Sets the attachment processor delegate for this processor.

Parameters:

delegate - the attachment processor delegate for this processor

delegate

public IERAttachmentProcessorDelegate delegate()

Returns the attachment processor delegate for this processor.

Returns:

the attachment processor delegate for this processor

proxiedUrl

protected java.lang.String proxiedUrl(T attachment,
                                      com.webobjects.appserver.WOContext context)

Returns a URL to the given attachment that routes via the ERAttachmentRequestHandler.

Parameters:

attachment - the attachment to proxy

context - the context

Returns:

an ERAttachmentRequestHandler URL

process

public T process(com.webobjects.eocontrol.EOEditingContext editingContext,
                 java.io.File uploadedFile)
                               throws java.io.IOException

Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it. uploadedFile will NOT be deleted after the import process is complete.

Parameters:

editingContext - the EOEditingContext to create the ERAttachment in

uploadedFile - the file to attach (which will NOT be deleted at the end)

Returns:

an ERAttachment that represents the file

Throws:

java.io.IOException - if the processing fails

process

public T process(com.webobjects.eocontrol.EOEditingContext editingContext,
                 java.io.File uploadedFile,
                 java.lang.String recommendedFilePath)
                               throws java.io.IOException

Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it. uploadedFile will be deleted after the import process is complete.

Parameters:

editingContext - the EOEditingContext to create the ERAttachment in

uploadedFile - the uploaded temporary file (which will be deleted at the end)

recommendedFilePath - the filename recommended by the user during import

Returns:

an ERAttachment that represents the file

Throws:

java.io.IOException - if the processing fails

process

public T process(com.webobjects.eocontrol.EOEditingContext editingContext,
                 java.io.File uploadedFile,
                 java.lang.String recommendedFilePath,
                 java.lang.String mimeType)
                               throws java.io.IOException

Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it. uploadedFile will be deleted after the import process is complete.

Parameters:

editingContext - the EOEditingContext to create the ERAttachment in

uploadedFile - the uploaded temporary file (which will be deleted at the end)

recommendedFilePath - the filename recommended by the user during import

mimeType - the mimeType to use (null = guess based on file extension)

Returns:

an ERAttachment that represents the file

Throws:

java.io.IOException - if the processing fails

process

public T process(com.webobjects.eocontrol.EOEditingContext editingContext,
                 java.io.File uploadedFile,
                 java.lang.String recommendedFilePath,
                 java.lang.String mimeType,
                 java.lang.String configurationName,
                 java.lang.String ownerID)
                               throws java.io.IOException

Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it. uploadedFile will be deleted after the import process is complete.

Parameters:

editingContext - the EOEditingContext to create the ERAttachment in

uploadedFile - the uploaded temporary file (which will be deleted at the end)

recommendedFilePath - the filename recommended by the user during import

mimeType - the mimeType to use (null = guess based on file extension)

configurationName - the name of the configuration settings to use for this processor (see top level docs)

ownerID - an arbitrary string that represents the ID of the "owner" of this thumbnail (Person.primaryKey, for instance)

Returns:

an ERAttachment that represents the file

Throws:

java.io.IOException - if the processing fails

process

public T process(com.webobjects.eocontrol.EOEditingContext editingContext,
                 java.io.File uploadedFile,
                 java.lang.String recommendedFilePath,
                 java.lang.String mimeType,
                 int width,
                 int height,
                 java.lang.String configurationName,
                 java.lang.String ownerID)
                               throws java.io.IOException

Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it. uploadedFile will be deleted after the import process is complete.

Parameters:

editingContext - the EOEditingContext to create the ERAttachment in

uploadedFile - the uploaded temporary file (which will be deleted at the end)

recommendedFilePath - the filename recommended by the user during import

mimeType - the mimeType to use (null = guess based on file extension)

configurationName - the name of the configuration settings to use for this processor (see top level docs)

ownerID - an arbitrary string that represents the ID of the "owner" of this thumbnail (Person.primaryKey, for instance)

width - the desired width of the attachment

height - the desired height of the attachment

Returns:

an ERAttachment that represents the file

Throws:

java.io.IOException - if the processing fails

process

public T process(com.webobjects.eocontrol.EOEditingContext editingContext,
                 ERPendingAttachment pendingAttachment)
                               throws java.io.IOException

Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it. uploadedFile will be deleted after the import process is complete.

Parameters:

editingContext - the EOEditingContext to create the ERAttachment in

pendingAttachment - the ERPendingAttachment that encapsulates the import information

Returns:

an ERAttachment that represents the file

Throws:

java.io.IOException - if the processing fails

attachmentInserted

public void attachmentInserted(T attachment)

Called after an attachment has been inserted (from didInsert).

Parameters:

attachment - the inserted attachment

proxyAsAttachment

public boolean proxyAsAttachment(T attachment)

Returns whether or not the proxy request handler should return this as an attachment with a Content-Disposition.

Returns:

true if the proxy should use a content-disposition

_process

public abstract T _process(com.webobjects.eocontrol.EOEditingContext editingContext,
                           java.io.File uploadedFile,
                           java.lang.String recommendedFileName,
                           java.lang.String mimeType,
                           java.lang.String configurationName,
                           java.lang.String ownerID,
                           boolean pendingDelete)
                                         throws java.io.IOException

Processes an uploaded file, imports it into the appropriate data store, and returns an ERAttachment that represents it. uploadedFile will be deleted after the import process is complete.

Parameters:

editingContext - the EOEditingContext to create the ERAttachment in

uploadedFile - the uploaded temporary file (which will be deleted at the end)

recommendedFileName - the filename recommended by the user during import

mimeType - the mimeType to use (null = guess based on file extension)

configurationName - the name of the configuration settings to use for this processor (see top level docs)

ownerID - an arbitrary string that represents the ID of the "owner" of this thumbnail (Person.primaryKey, for instance)

pendingDelete - if true, the uploadedFile will be deleted after import; if false, it will be left alone

Returns:

an ERAttachment that represents the file

Throws:

java.io.IOException - if the processing fails

attachmentInputStream

public abstract java.io.InputStream attachmentInputStream(T attachment)
                                                   throws java.io.IOException

Returns an InputStream to the data of the given attachment.

Parameters:

attachment - the attachment to retrieve the data for

Returns:

an InputStream onto the data

Throws:

java.io.IOException - if the stream cannot be created

attachmentUrl

public abstract java.lang.String attachmentUrl(T attachment,
                                               com.webobjects.appserver.WORequest request,
                                               com.webobjects.appserver.WOContext context)

Returns a URL to the attachment's data.

Parameters:

attachment - the attachment to generate a URL for

request - the current request

context - the current context

Returns:

a URL to the attachment's data

deleteAttachment

public abstract void deleteAttachment(T attachment)
                               throws java.io.IOException

Deletes the attachment from the data store.

Parameters:

attachment - the attachment to delete

Throws:

java.io.IOException - if the delete fails