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- /*
- * Copyright (C) 2008, Google Inc.
- * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org>
- * and other copyright owners as documented in the project's IP log.
- *
- * This program and the accompanying materials are made available
- * under the terms of the Eclipse Distribution License v1.0 which
- * accompanies this distribution, is reproduced below, and is
- * available at http://www.eclipse.org/org/documents/edl-v10.php
- *
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or
- * without modification, are permitted provided that the following
- * conditions are met:
- *
- * - Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * - Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following
- * disclaimer in the documentation and/or other materials provided
- * with the distribution.
- *
- * - Neither the name of the Eclipse Foundation, Inc. nor the
- * names of its contributors may be used to endorse or promote
- * products derived from this software without specific prior
- * written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
- * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
- * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
- * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
- 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(final TreeFilter a) {
- return new NotTreeFilter(a);
- }
-
- private final TreeFilter a;
-
- private NotTreeFilter(final TreeFilter one) {
- a = one;
- }
-
- @Override
- public TreeFilter negate() {
- return a;
- }
-
- @Override
- public boolean include(final 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(); //$NON-NLS-1$
- }
- }
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