| /******************************************************************************* |
| * Copyright (c) 2000, 2011 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.refactoring; |
| |
| import java.util.Arrays; |
| import java.util.HashSet; |
| import java.util.Set; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.jface.viewers.ITreeContentProvider; |
| import org.eclipse.jface.viewers.Viewer; |
| |
| import org.eclipse.jdt.core.dom.ITypeBinding; |
| |
| import org.eclipse.jdt.internal.corext.refactoring.structure.ChangeTypeRefactoring; |
| import org.eclipse.jdt.internal.corext.util.CollectionsUtil; |
| |
| class ChangeTypeContentProvider implements ITreeContentProvider { |
| |
| private ChangeTypeRefactoring fGeneralizeType; |
| |
| ChangeTypeContentProvider(ChangeTypeRefactoring gt){ |
| fGeneralizeType= gt; |
| } |
| |
| @Override |
| public Object[] getChildren(Object element) { |
| if (element instanceof RootType){ |
| return ((RootType)element).getChildren(); |
| } |
| ITypeBinding[] superTypes = CollectionsUtil.toArray(getDirectSuperTypes((ITypeBinding)element), ITypeBinding.class); |
| Arrays.sort(superTypes, (o1, o2) -> { |
| String name1 = o1.getQualifiedName(); |
| String name2 = o2.getQualifiedName(); |
| return name1.compareTo(name2); |
| }); |
| return superTypes; |
| } |
| |
| /** |
| * @param type a type |
| * @return the direct superclass and direct superinterfaces. Class Object is |
| * included in the result if the root of the hierarchy is a top-level |
| * interface. |
| */ |
| public Set<ITypeBinding> getDirectSuperTypes(ITypeBinding type){ |
| Set<ITypeBinding> result= new HashSet<>(); |
| if (type.getSuperclass() != null){ |
| result.add(type.getSuperclass()); |
| } |
| ITypeBinding[] interfaces= type.getInterfaces(); |
| result.addAll(Arrays.asList(interfaces)); |
| if (fGeneralizeType.getOriginalType().isInterface() && type != fGeneralizeType.getObject()){ |
| result.add(fGeneralizeType.getObject()); |
| } |
| return result; |
| } |
| |
| @Override |
| public Object[] getElements(Object element) { |
| Assert.isTrue(element instanceof RootType); |
| return ((RootType)element).getChildren(); |
| } |
| |
| @Override |
| public boolean hasChildren(Object element) { |
| return getChildren(element).length > 0; |
| } |
| |
| @Override |
| public Object getParent(Object element) { |
| return null; |
| } |
| |
| @Override |
| public void dispose() { |
| } |
| |
| @Override |
| public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { |
| } |
| |
| /** |
| * Artificial "root node" of the tree view. This is needed to handle situations where the replacement |
| * types do not have a single common supertype. Also, the tree view does not show the root node by |
| * default. |
| */ |
| static class RootType { |
| RootType(ITypeBinding root){ |
| fRoot = root; |
| } |
| public ITypeBinding[] getChildren(){ |
| return new ITypeBinding[]{ fRoot }; |
| } |
| private ITypeBinding fRoot; |
| } |
| } |