CreateNewTopLevelSuperClass.java

/**
 * Copyright (c) 2008-2012 University of Illinois at Urbana-Champaign.
 * 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 edu.illinois.compositerefactorings.steps;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.jdt.core.IType;
import org.eclipse.jdt.core.dom.ASTNode;
import org.eclipse.jdt.core.dom.BodyDeclaration;
import org.eclipse.jdt.core.dom.ITypeBinding;
import org.eclipse.jdt.core.dom.TypeDeclaration;
import org.eclipse.jdt.ui.text.java.IInvocationContext;
import org.eclipse.ltk.core.refactoring.RefactoringDescriptor;

public class CreateNewTopLevelSuperClass extends RefactoringBasedStep {

	public CreateNewTopLevelSuperClass(IInvocationContext context, ASTNode coveringNode, boolean problemsAtLocation) {
		super(context, coveringNode, problemsAtLocation);
	}

	@Override
	protected Collection<? extends TypeDeclaration> getInputs() {
		Collection<TypeDeclaration> inputs= new ArrayList<TypeDeclaration>();
		TypeDeclaration typeDeclaration= null;

		if (context.getCoveredNode() instanceof TypeDeclaration) {
			typeDeclaration= (TypeDeclaration)context.getCoveredNode();
		} else if (coveringNode instanceof TypeDeclaration) {
			typeDeclaration= (TypeDeclaration)coveringNode;
		} else if (!(coveringNode instanceof BodyDeclaration) && coveringNode.getParent() != null && coveringNode.getParent() instanceof TypeDeclaration) {
			typeDeclaration= (TypeDeclaration)coveringNode.getParent();
		}

		if (typeDeclaration != null) {
			inputs.add(typeDeclaration);
		}

		return inputs;
	}

	@Override
	protected Collection<RefactoringDescriptor> getDescriptors(Object input) throws CoreException {
		TypeDeclaration typeDeclaration= (TypeDeclaration)input;
		ITypeBinding typeBinding= typeDeclaration.resolveBinding();
		IType type= (IType)typeBinding.getJavaElement();
		Collection<RefactoringDescriptor> descriptors= new ArrayList<RefactoringDescriptor>();
		descriptors.add(CreateNewSuperclassCommandHandler.createRefactoringDescriptor(Arrays.asList(type)));
		return descriptors;
	}

}