Package org.alfresco.repo.content

Class AbstractContentAccessor

java.lang.Object

org.alfresco.repo.content.AbstractContentAccessor

All Implemented Interfaces:

ContentAccessor

Direct Known Subclasses:

AbstractContentReader, AbstractContentWriter

public abstract class AbstractContentAccessor
extends Object
implements ContentAccessor

Provides basic support for content accessors.

Author:

Derek Hulley

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	AbstractContentAccessor.CallbackFileChannel	Wraps a FileChannel to provide callbacks to listeners when the channel is closed.
protected class	AbstractContentAccessor.ChannelCloseCallbackAdvise	Advise that listens for the completion of specific methods on the ByteChannel interface.

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractContentAccessor(String contentUrl)

Method Summary

Modifier and Type	Method	Description
protected void	channelOpened()	Derived classes can call this method to ensure that necessary trace logging is performed when the IO Channel is opened.
protected void	finalize()
protected FileChannel	getCallbackFileChannel(FileChannel directChannel, List<ContentStreamListener> listeners)	Generate a callback instance of the FileChannel.
ContentData	getContentData()
String	getContentUrl()
String	getEncoding()
Locale	getLocale()
String	getMimetype()
protected void	setContentUrl(String contentUrl)	Allow derived implementations to set the Content URL.
void	setEncoding(String encoding)
void	setLocale(Locale locale)
void	setMimetype(String mimetype)
String	toString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.alfresco.service.cmr.repository.ContentAccessor

addListener, getSize, isChannelOpen

Constructor Detail

AbstractContentAccessor

protected AbstractContentAccessor(String contentUrl)

Parameters:

contentUrl - the content URL

Method Detail

finalize

protected void finalize()
                 throws Throwable

Overrides:

finalize in class Object

Throws:

Throwable

toString

public String toString()

Overrides:

toString in class Object

getContentData

public ContentData getContentData()

Specified by:

getContentData in interface ContentAccessor

channelOpened

protected final void channelOpened()

Derived classes can call this method to ensure that necessary trace logging is performed when the IO Channel is opened.

getContentUrl

public String getContentUrl()

Specified by:

getContentUrl in interface ContentAccessor

setContentUrl

protected void setContentUrl(String contentUrl)

Allow derived implementations to set the Content URL. This allows for implementations where the URL is not known when the accessor is first constructed.

Parameters:

contentUrl - the new content URL

getMimetype

public String getMimetype()

Specified by:

getMimetype in interface ContentAccessor

setMimetype

public void setMimetype(String mimetype)

Specified by:

setMimetype in interface ContentAccessor

Parameters:

mimetype - the underlying content's mimetype - null if unknown

getEncoding

public String getEncoding()

Specified by:

getEncoding in interface ContentAccessor

Returns:

Returns the content encoding - null if unknown

setEncoding

public void setEncoding(String encoding)

Specified by:

setEncoding in interface ContentAccessor

Parameters:

encoding - the underlying content's encoding - null if unknown

getLocale

public Locale getLocale()

Specified by:

getLocale in interface ContentAccessor

Returns:

Returns the content locale or null if unkown

setLocale

public void setLocale(Locale locale)

Specified by:

setLocale in interface ContentAccessor

Parameters:

locale - the content's locale, if known.

getCallbackFileChannel

protected FileChannel getCallbackFileChannel(FileChannel directChannel,
                                             List<ContentStreamListener> listeners)
                                      throws ContentIOException

Generate a callback instance of the FileChannel.

Parameters:

directChannel - the delegate that to perform the actual operations

listeners - the listeners to call

Returns:

Returns a new channel that functions just like the original, except that it issues callbacks to the listeners

Throws:

ContentIOException