| /* |
| * Copyright (C) 2008, Google Inc. |
| * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> and others |
| * |
| * This program and the accompanying materials are made available under the |
| * terms of the Eclipse Distribution License v. 1.0 which is available at |
| * https://www.eclipse.org/org/documents/edl-v10.php. |
| * |
| * SPDX-License-Identifier: BSD-3-Clause |
| */ |
| |
| package org.eclipse.jgit.treewalk.filter; |
| |
| import java.io.IOException; |
| |
| import org.eclipse.jgit.errors.IncorrectObjectTypeException; |
| import org.eclipse.jgit.errors.MissingObjectException; |
| import org.eclipse.jgit.treewalk.TreeWalk; |
| |
| /** |
| * Includes an entry only if the subfilter does not include the entry. |
| */ |
| public class NotTreeFilter extends TreeFilter { |
| /** |
| * Create a filter that negates the result of another filter. |
| * |
| * @param a |
| * filter to negate. |
| * @return a filter that does the reverse of <code>a</code>. |
| */ |
| public static TreeFilter create(TreeFilter a) { |
| return new NotTreeFilter(a); |
| } |
| |
| private final TreeFilter a; |
| |
| private NotTreeFilter(TreeFilter one) { |
| a = one; |
| } |
| |
| @Override |
| public TreeFilter negate() { |
| return a; |
| } |
| |
| @Override |
| public boolean include(TreeWalk walker) |
| throws MissingObjectException, IncorrectObjectTypeException, |
| IOException { |
| return matchFilter(walker) == 0; |
| } |
| |
| @Override |
| public int matchFilter(TreeWalk walker) |
| throws MissingObjectException, IncorrectObjectTypeException, |
| IOException { |
| final int r = a.matchFilter(walker); |
| // switch 0 and 1, keep -1 as that defines a subpath that must be |
| // traversed before a final verdict can be made. |
| if (r == 0) { |
| return 1; |
| } |
| if (r == 1) { |
| return 0; |
| } |
| return -1; |
| } |
| |
| @Override |
| public boolean shouldBeRecursive() { |
| return a.shouldBeRecursive(); |
| } |
| |
| @Override |
| public TreeFilter clone() { |
| final TreeFilter n = a.clone(); |
| return n == a ? this : new NotTreeFilter(n); |
| } |
| |
| @Override |
| public String toString() { |
| return "NOT " + a.toString(); //$NON-NLS-1$ |
| } |
| } |