| /******************************************************************************* |
| * Copyright (c) 2011 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.ant.internal.ui.model; |
| |
| import java.util.Hashtable; |
| |
| import org.apache.tools.ant.UnknownElement; |
| |
| /** |
| * This class has been copied in its entirety from the static |
| * inner class AntRefTable from {@link org.apache.tools.ant.Project} |
| */ |
| public class AntRefTable extends Hashtable { |
| |
| private static final long serialVersionUID = 1L; |
| |
| AntRefTable() { |
| super(); |
| } |
| |
| /** |
| * Returns the unmodified original object. |
| * This method should be called internally to |
| * get the "real" object. |
| * The normal get method will do the replacement |
| * of UnknownElement (this is similar with the JDNI |
| * refs behavior). |
| */ |
| private Object getReal(Object key) { |
| return super.get(key); |
| } |
| |
| /** |
| * Get method for the reference table. |
| * It can be used to hook dynamic references and to modify |
| * some references on the fly--for example for delayed |
| * evaluation. |
| * |
| * It is important to make sure that the processing that is |
| * done inside is not calling get indirectly. |
| * |
| * @param key lookup key. |
| * @return mapped value. |
| */ |
| public synchronized Object get(Object key) { |
| Object o = getReal(key); |
| if (o instanceof UnknownElement) { |
| // Make sure that |
| UnknownElement ue = (UnknownElement) o; |
| ue.maybeConfigure(); |
| o = ue.getRealThing(); |
| } |
| return o; |
| } |
| } |
