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- /*
- * Copyright (C) 2013, Robin Rosenberg <robin.rosenberg@dewire.com>
- * 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 org.eclipse.jgit.dircache.DirCacheEntry;
- import org.eclipse.jgit.dircache.DirCacheIterator;
- import org.eclipse.jgit.treewalk.TreeWalk;
-
- /**
- * A filter for extracting changes between two versions of the dircache. In
- * addition to what {@link TreeFilter#ANY_DIFF} would do, it also detects
- * changes that will affect decorations and show up in an attempt to commit.
- */
- public final class InterIndexDiffFilter extends TreeFilter {
- private static final int baseTree = 0;
-
- /**
- * Predefined InterIndexDiffFilter for finding changes between two dircaches
- */
- public static final TreeFilter INSTANCE = new InterIndexDiffFilter();
-
- @Override
- public boolean include(final TreeWalk walker) {
- final int n = walker.getTreeCount();
- if (n == 1) // Assume they meant difference to empty tree.
- return true;
-
- final int m = walker.getRawMode(baseTree);
- for (int i = 1; i < n; i++) {
- DirCacheIterator baseDirCache = walker.getTree(baseTree,
- DirCacheIterator.class);
- DirCacheIterator newDirCache = walker.getTree(i,
- DirCacheIterator.class);
- if (baseDirCache != null && newDirCache != null) {
- DirCacheEntry baseDci = baseDirCache.getDirCacheEntry();
- DirCacheEntry newDci = newDirCache.getDirCacheEntry();
- if (baseDci != null && newDci != null) {
- if (baseDci.isAssumeValid() != newDci.isAssumeValid())
- return true;
- if (baseDci.isAssumeValid()) // && newDci.isAssumeValid()
- return false;
- }
- }
- if (walker.getRawMode(i) != m || !walker.idEqual(i, baseTree))
- return true;
- }
- return false;
- }
-
- @Override
- public boolean shouldBeRecursive() {
- return false;
- }
-
- @Override
- public TreeFilter clone() {
- return this;
- }
-
- @Override
- public String toString() {
- return "INTERINDEX_DIFF"; //$NON-NLS-1$
- }
- }
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