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/*******************************************************************************
* Copyright (c) 2005 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.wst.command.internal.env.core.fragment;
import java.util.Vector;
import org.eclipse.wst.command.internal.env.core.CommandFactory;
import org.eclipse.wst.command.internal.env.core.ICommandFactory;
import org.eclipse.wst.command.internal.env.core.data.DataMappingRegistry;
import org.eclipse.wst.common.frameworks.datamodel.AbstractDataModelOperation;
public abstract class CommandFactoryFragment implements CommandFragment
{
private Vector commands_;
/**
* Subclasses should override this method and return
* an CommandFactory.
* @return
*/
public abstract ICommandFactory getICommandFactory();
/**
* All wizard fragments need to be cloneable.
**/
public abstract Object clone();
protected CommandFactoryFragment( CommandFactoryFragment frag )
{
commands_ = frag.commands_;
}
public CommandFactoryFragment()
{
}
/**
*
* @return Returns a unique identifier for this fragment.
*/
public String getId()
{
return "";
}
/**
* Gets executable command associated with this fragment.
*
* @return returns the first child fragment for this fragment. Returns
* null when there is no first child.
**/
public CommandFactory getCommandFactory()
{
return null;
}
/**
* Gets the first child fragment for this fragment.
*
* @return returns the first child fragment for this fragment. Returns
* null when there is no first child.
**/
public CommandFragment getFirstSubFragment()
{
CommandFragment result = null;
commands_ = createCommands();
if( commands_.size() > 0 )
{
result = (ChildFragment)commands_.elementAt(0);
}
return result;
}
/**
* Gets the next child fragment for this fragment.
*
* @return returns the next child fragment for this fragment. Returns null
* when there is no next child.
**/
public CommandFragment getNextSubFragment( CommandFragment fragment )
{
CommandFragment result = null;
if( commands_ != null && fragment instanceof ChildFragment )
{
ChildFragment child = (ChildFragment)fragment;
int index = child.index_;
if( index != -1 )
{
index++;
if( index < commands_.size() )
{
result = (CommandFragment)commands_.elementAt( index );
}
}
}
return result;
}
/*
* This method is called to retrieve the data mappings for this command fragment.
*/
public void registerDataMappings( DataMappingRegistry registry )
{
}
/**
*
* @return If the commands for this fragment should not be run within a transaction then
* this method should return true. If the fragment does not care if it is run in a transaction
* or not it should return false.
*/
public boolean doNotRunInTransaction()
{
return false;
}
private Vector createCommands()
{
Vector commands = new Vector();
ICommandFactory factory = getICommandFactory();
int index = 0;
while( factory != null && factory.hasNext() )
{
AbstractDataModelOperation command = factory.getNextCommand();
commands.add( new ChildFragment( command, index++ ) );
}
return commands;
}
private class ChildFragment extends SimpleFragment
{
int index_;
public ChildFragment( AbstractDataModelOperation command, int index )
{
super( command, command.getID() );
index_ = index;
}
}
}
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