Class semper.preferences.PrefStream 
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Class semper.preferences.PrefStream 

java.lang.Object
   |
   +----semper.preferences.PrefStream
public class PrefStream
extends Object
implements Streamable
This class is used by the Preferences class to produce a stream encoding the actual state of the preferences manager. This class is also used to retrieve the state of Preferences from a stream. This should not be used outside the Preferences manager directly.

Constructor Index

o PrefStream()
Constructor.

Method Index

o groupsRead()
Returns an enumeration of groupname read last time readObject has been called
o groupsReadCount()
Gives the number of groups read.
o myStreamSize()
Returns the size of the stream that would hold the externalized form of this field.
o readObject(StreamInputInterface)
Internalizes this Preferences environment.
o subGroupReadObject(StreamInputInterface)
Internalizes the subgroup structure.
o subGroupStreamSize()
Returns the size of the stream corresponding to the subgroup strcuture.
o subGroupWriteObject(StreamOutputInterface)
Externalizes the subgroup structure.
o writeObject(StreamOutputInterface)
Externalizes this Preferences environment.

Constructors

o PrefStream 
  public PrefStream()
Constructor. Used by Preferences manager and newInstance(). The new object is then used to write or read (from a stream) a Preferences manager state.
Returns:
a new empty object.
See Also:
Streamable

Methods

o groupsRead 
  protected Enumeration groupsRead()
Returns an enumeration of groupname read last time readObject has been called
Returns:
an enumeration of all groups.
o groupsReadCount 
  protected int groupsReadCount()
Gives the number of groups read.
Returns:
the number of groups.
o myStreamSize 
  public int myStreamSize() throws StreamIOException
Returns the size of the stream that would hold the externalized form of this field.
Returns:
the size of the stream in bytes
See Also:
Streamable
o readObject 
  public void readObject(StreamInputInterface stream) throws StreamIOException
Internalizes this Preferences environment.
Parameters:
stream - is the stream of data the object state is retrieved from
Returns:
none.
See Also:
Streamable
o writeObject 
  public void writeObject(StreamOutputInterface stream) throws StreamIOException
Externalizes this Preferences environment.
Parameters:
stream - is the stream of data the object state is recorded in
Returns:
none
See Also:
Streamable
o subGroupStreamSize 
  public int subGroupStreamSize() throws StreamIOException
Returns the size of the stream corresponding to the subgroup strcuture.
Returns:
the size of the stream in bytes
See Also:
Streamable
o subGroupReadObject 
  public void subGroupReadObject(StreamInputInterface stream) throws StreamIOException
Internalizes the subgroup structure.
Parameters:
stream - is the stream of data the object state is retrieved from
Returns:
none.
See Also:
Streamable
o subGroupWriteObject 
  public void subGroupWriteObject(StreamOutputInterface stream) throws StreamIOException
Externalizes the subgroup structure.
Parameters:
stream - is the stream of data the object state is recorded in
Returns:
none
See Also:
Streamable 
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