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org.alfresco.service.cmr.repository
Interface ContentAccessor
All Known Subinterfaces:
ContentReader, ContentWriter
All Known Implementing Classes:
AbstractContentReader, AbstractContentWriter, FileContentReader, FileContentWriter

public interface ContentAccessor
Interface for instances that provide read and write access to content.
Author:
Derek Hulley

Method Summary
void
addListener(ContentStreamListener listener)
          Use this method to register any interest in events against underlying content streams.
getContentData()
          Get the data representation of the content being accessed.
getContentUrl()
          Retrieve the URL that this accessor references
getEncoding()
          Get the encoding of the content being accessed
getLocale()
          Get the locale of the content being accessed
getMimetype()
          Get the content mimetype
long
getSize()
          Gets the size of the content that this reader references.
boolean
isChannelOpen()
          Gets the open/close state of the underlying IO Channel.
void
setEncoding(String encoding)
          Set the String encoding for this accessor
void
setLocale(Locale locale)
          Set the Locale for this accessor
void
setMimetype(String mimetype)
          Set the mimetype that must be used for accessing the content.
Method Detail
isChannelOpen
boolean isChannelOpen()
Gets the open/close state of the underlying IO Channel.
Returns:
Returns true if the underlying IO Channel is open

addListener
void addListener(ContentStreamListener listener)
Use this method to register any interest in events against underlying content streams.

This method can only be used before the content stream has been retrieved.

When the stream has been closed, all listeners will be called. The listener is responsible for using a retrying transaction to protect the implementation of the callback when required.

Parameters:
listener - a listener that will be called for output stream event notification

getSize
long getSize()
Gets the size of the content that this reader references.
Returns:
Returns the document byte length, or OL if the content doesn't exist.

getContentData
ContentData getContentData()
Get the data representation of the content being accessed.

The content mimetype must be set before this method is called as the content data requires a mimetype whenever the content URL is specified.

Returns:
Returns the content data
See Also:
ContentData.ContentData(String, String, long, String)

getContentUrl
String getContentUrl()
Retrieve the URL that this accessor references
Returns:
the content URL

getMimetype
String getMimetype()
Get the content mimetype
Returns:
Returns a content mimetype

setMimetype
void setMimetype(String mimetype)
Set the mimetype that must be used for accessing the content.

When dealing with a ContentWriter, you may wish to use ContentWriter.guessMimetype(String) to have this set for you based on the filename and contents.

Parameters:
mimetype - the content mimetype

getEncoding
String getEncoding()
Get the encoding of the content being accessed
Returns:
Returns a valid java String encoding

setEncoding
void setEncoding(String encoding)
Set the String encoding for this accessor

When dealing with a ContentWriter, you may wish to use ContentWriter.guessMimetype(String) to have this set for you based on the contents.

Parameters:
encoding - a java-recognised encoding format

getLocale
Locale getLocale()
Get the locale of the content being accessed
Returns:
Returns a valid java Locale

setLocale
void setLocale(Locale locale)
Set the Locale for this accessor
Parameters:
locale - a java-recognised locale

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