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// **********************************************************************
//
// Copyright (c) 2003-2006 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
package IceGrid.TreeNode;
import IceGrid.Model;
//
// A parent that holds a list of children
//
abstract class ListParent extends Parent
{
protected ListParent(String id, Model model, boolean root)
{
super(id, model, root);
}
protected ListParent(String id, Model model)
{
this(id, model, false);
}
protected void addDescriptor(Object descriptor)
{
_descriptors.add(descriptor);
}
protected void removeDescriptor(Object descriptor)
{
//
// A straight remove uses equals(), which is not the desired behavior
//
java.util.Iterator p = _descriptors.iterator();
while(p.hasNext())
{
if(descriptor == p.next())
{
p.remove();
break;
}
}
}
//
// Try to add this new element
//
void tryAdd(Object descriptor)
throws UpdateFailedException
{
_descriptors.add(descriptor);
java.util.List newChildren = new java.util.LinkedList();
java.util.List list = _parent.findAllInstances(this);
java.util.Iterator p = list.iterator();
while(p.hasNext())
{
ListParent container = (ListParent)p.next();
try
{
newChildren.add(container.addNewChild(descriptor));
}
catch(UpdateFailedException e)
{
//
// Rollback
//
java.util.Iterator q = newChildren.iterator();
p = list.iterator();
while(q.hasNext())
{
container = (ListParent)p.next();
container.removeChild((CommonBase)q.next());
}
removeDescriptor(descriptor);
throw e;
}
}
}
//
// Try to update this child
//
void tryUpdate(CommonBase child)
throws UpdateFailedException
{
java.util.List list = _parent.findAllInstances(this);
Object descriptor = child.getDescriptor();
java.util.List backupList = new java.util.Vector();
java.util.List children = new java.util.Vector();
java.util.List editables = new java.util.LinkedList();
java.util.Iterator p = list.iterator();
while(p.hasNext())
{
ListParent parent = (ListParent)p.next();
try
{
child = parent.findChildWithDescriptor(descriptor);
backupList.add(parent.rebuildChild(child, editables));
children.add(child);
}
catch(UpdateFailedException e)
{
for(int i = backupList.size() - 1; i >= 0; --i)
{
parent = (ListParent)list.get(i);
child = (CommonBase)children.get(i);
parent.restoreChild(child, backupList.get(i));
}
throw e;
}
}
//
// Success
//
p = editables.iterator();
while(p.hasNext())
{
Editable editable = (Editable)p.next();
editable.markModified();
}
}
boolean destroyChild(CommonBase child)
{
if(child.isEphemeral())
{
removeChild(child, true);
return true;
}
else
{
if(_model.canUpdate())
{
Object descriptor = child.getDescriptor();
removeDescriptor(descriptor);
getEditable().markModified();
//
// List of Services, Adapters etc
//
java.util.List list = _parent.findAllInstances(this);
java.util.Iterator p = list.iterator();
while(p.hasNext())
{
ListParent parent = (ListParent)p.next();
parent.removeChild(
parent.findChildWithDescriptor(descriptor),
true);
}
return true;
}
else
{
return false;
}
}
}
protected java.util.List _descriptors;
}
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