| /******************************************************************************* |
| * Copyright (c) 2000, 2008 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.core; |
| |
| /** |
| * A Java model region describes a hierarchical set of elements. |
| * Regions are often used to describe a set of elements to be considered |
| * when performing operations; for example, the set of elements to be |
| * considered during a search. A region may include elements from different |
| * projects. |
| * <p> |
| * When an element is included in a region, all of its children |
| * are considered to be included. Children of an included element |
| * <b>cannot</b> be selectively excluded. |
| * </p> |
| * <p> |
| * Instances can be created via the <code>JavaCore.newRegion</code>. |
| * </p> |
| * |
| * @see JavaCore#newRegion() |
| * @noimplement This interface is not intended to be implemented by clients. |
| */ |
| public interface IRegion { |
| /** |
| * Adds the given element and all of its descendents to this region. |
| * If the specified element is already included, or one of its |
| * ancestors is already included, this has no effect. If the element |
| * being added is an ancestor of an element already contained in this |
| * region, the ancestor subsumes the descendent. |
| * |
| * @param element the given element |
| */ |
| void add(IJavaElement element); |
| /** |
| * Returns whether the given element is contained in this region. |
| * |
| * @param element the given element |
| * @return true if the given element is contained in this region, false otherwise |
| */ |
| boolean contains(IJavaElement element); |
| /** |
| * Returns the top level elements in this region. |
| * All descendents of these elements are also included in this region. |
| * |
| * @return the top level elements in this region |
| */ |
| IJavaElement[] getElements(); |
| /** |
| * Removes the specified element from the region and returns |
| * <code>true</code> if successful, <code>false</code> if the remove |
| * fails. If an ancestor of the given element is included, the |
| * remove fails (in other words, it is not possible to selectively |
| * exclude descendants of included ancestors). |
| * |
| * @param element the given element |
| * @return <code>true</code> if successful, <code>false</code> if the remove fails |
| */ |
| boolean remove(IJavaElement element); |
| } |