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//
// ========================================================================
// Copyright (c) 1995-2016 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.webapp;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.jetty.util.resource.Resource;
/**
* AbsoluteOrdering
*
*/
public class AbsoluteOrdering implements Ordering
{
public static final String OTHER = "@@-OTHER-@@";
protected List<String> _order = new ArrayList<String>();
protected boolean _hasOther = false;
protected MetaData _metaData;
public AbsoluteOrdering (MetaData metaData)
{
_metaData = metaData;
}
@Override
public List<Resource> order(List<Resource> jars)
{
List<Resource> orderedList = new ArrayList<Resource>();
List<Resource> tmp = new ArrayList<Resource>(jars);
//1. put everything into the list of named others, and take the named ones out of there,
//assuming we will want to use the <other> clause
Map<String,FragmentDescriptor> others = new HashMap<String,FragmentDescriptor>(_metaData.getNamedFragments());
//2. for each name, take out of the list of others, add to tail of list
int index = -1;
for (String item:_order)
{
if (!item.equals(OTHER))
{
FragmentDescriptor f = others.remove(item);
if (f != null)
{
Resource jar = _metaData.getJarForFragment(item);
orderedList.add(jar); //take from others and put into final list in order, ignoring duplicate names
//remove resource from list for resource matching name of descriptor
tmp.remove(jar);
}
}
else
index = orderedList.size(); //remember the index at which we want to add in all the others
}
//3. if <other> was specified, insert rest of the fragments
if (_hasOther)
{
orderedList.addAll((index < 0? 0: index), tmp);
}
return orderedList;
}
public void add (String name)
{
_order.add(name);
}
public void addOthers ()
{
if (_hasOther)
throw new IllegalStateException ("Duplicate <other> element in absolute ordering");
_hasOther = true;
_order.add(OTHER);
}
}
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