The interface for objects whose state can be undone or redone by a
StateEdit action.
The following example shows how to write a class that implements
this interface.
class Foo
implements StateEditable
{
private String name;
public void setName(String n) { name = n; }
public void restoreState(Hashtable h)
{
if (h.containsKey("name"))
setName((String) h.get("name"));
}
public void storeState(Hashtable s)
{
s.put("name", name);
}
}
The ID of the Java source file in Sun’s Revision Control
System (RCS). This certainly should not be part of the API
specification. But in order to be API-compatible with
Sun’s reference implementation, GNU Classpath also has to
provide this field and match its value. The value used here has
been in every JDK release at least from 1.2 to 1.5.
Performs an edit action, taking any editable state information
from the specified hash table.
Note to implementors of this interface: To increase
efficiency, the StateEdit class StateEdit.removeRedundantState() removes redundant state
information. Therefore, implementations of this interface must be
prepared for the case where certain keys were stored into the
table by storeState(Hashtable), but are not present anymore
when the restoreState method gets called.
Parameters:
state - a hash table containing the relevant state
information.
Stores any editable state information into the specified hash
table.
Parameters:
state - a hash table for storing relevant state
information.
StateEditable.java -- Interface for collaborating with StateEdit.
Copyright (C) 2002, 2003, 2006, Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
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As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
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