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Class w3c.jigsaw.pics.SampleLabelBureau 

java.lang.Object
   |
   +----w3c.jigsaw.pics.SampleLabelBureau
public class SampleLabelBureau
extends Object
implements LabelBureauInterface
This class implements a label bureau. The database for labels is provided by the underlying file system. The organisation is as follows:

The LabelBureau is attached to some directory D. For each service it handles, you have to create a subdirectory, according to the service name (its identifying URL). So for example, if you want to provide ratings as www.rating.com, you will have to create a D/www.rating.com directory.

Uner this service directory, for each site you want to label, you have to create a sub-directory. In our example, if our rating service wants to label www.w3.org, you will have to create a D/www.rating.com/www.w3.org directory. This directory should reflect the space of the labeled server (ie having the same file hierarchy), and each file should be the label itself (as transmited).

In our example, if the LabelBureau wants to find the label by www.rating.com for http://www.w3.org/pub/WWW/Overview.html, it will look for the file D/www.rating.com/http/www.w3.org/pub/WWW/Overview.html-label .

So, we really use the underlying file system as a database for labels.

FIXME: the LabelBureau should be an interface, same stands for the LabelService and Label classes.

Constructor Index

o SampleLabelBureau(File)
Create a new LabelBureau.

Method Index

o getIdentifier()
Get this label bureau directory.
o getLabelService(String)
Lookup for the given service in this bureau.

Constructors

o SampleLabelBureau 
 public SampleLabelBureau(File directory)
Create a new LabelBureau. The configuration files from the label bureau (the place were it takes its labels from), is given by the provided directory.

Parameters:
directory - This bureau root directory.
See Also:
LabelService

Methods

o getIdentifier 
 public String getIdentifier()
Get this label bureau directory.

o getLabelService 
 public LabelServiceInterface getLabelService(String url)
Lookup for the given service in this bureau.

Parameters:
name - The service name.
Returns:
A LabelService instance, or null if none was found. 
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