core/plugins/org.eclipse.dltk.ui/ui refactoring/org/eclipse/dltk/internal/ui/refactoring/UserInterfaceManager.java

/*******************************************************************************
 * Copyright (c) 2000, 2017 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
 *

 *******************************************************************************/
package org.eclipse.dltk.internal.ui.refactoring;

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.ltk.core.refactoring.Refactoring;
import org.eclipse.ltk.core.refactoring.participants.RefactoringProcessor;
import org.eclipse.ltk.ui.refactoring.RefactoringWizard;

public class UserInterfaceManager {

	private Map fMap = new HashMap();

	private static class Tuple {
		private Class starter;
		private Class wizard;

		public Tuple(Class s, Class w) {
			starter = s;
			wizard = w;
		}
	}

	protected void put(Class processor, Class starter, Class wizard) {
		fMap.put(processor, new Tuple(starter, wizard));
	}

	public UserInterfaceStarter getStarter(Refactoring refactoring) {
		RefactoringProcessor processor = refactoring
				.getAdapter(RefactoringProcessor.class);
		if (processor == null)
			return null;
		Tuple tuple = null;
		Class clazz = processor.getClass();
		do {
			tuple = (Tuple) fMap.get(clazz);
			clazz = clazz.getSuperclass();
		} while (tuple == null);
		try {
			UserInterfaceStarter starter = (UserInterfaceStarter) tuple.starter
					.newInstance();
			Class wizardClass = tuple.wizard;
			Constructor constructor = wizardClass
					.getConstructor(new Class[] { Refactoring.class });
			RefactoringWizard wizard = (RefactoringWizard) constructor
					.newInstance(new Object[] { refactoring });
			starter.initialize(wizard);
			return starter;
		} catch (NoSuchMethodException e) {
			return null;
		} catch (IllegalAccessException e) {
			return null;
		} catch (InstantiationException e) {
			return null;
		} catch (IllegalArgumentException e) {
			return null;
		} catch (InvocationTargetException e) {
			return null;
		}
	}
}