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- /*
- * 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.revwalk.filter;
-
- import java.util.regex.Pattern;
-
- import org.eclipse.jgit.internal.JGitText;
- import org.eclipse.jgit.revwalk.RevCommit;
- import org.eclipse.jgit.util.RawCharSequence;
- import org.eclipse.jgit.util.RawParseUtils;
-
- /**
- * Matches only commits whose message matches the pattern.
- */
- public class MessageRevFilter {
- /**
- * Create a message filter.
- * <p>
- * An optimized substring search may be automatically selected if the
- * pattern does not contain any regular expression meta-characters.
- * <p>
- * The search is performed using a case-insensitive comparison. The
- * character encoding of the commit message itself is not respected. The
- * filter matches on raw UTF-8 byte sequences.
- *
- * @param pattern
- * regular expression pattern to match.
- * @return a new filter that matches the given expression against the
- * message body of the commit.
- */
- public static RevFilter create(String pattern) {
- if (pattern.length() == 0)
- throw new IllegalArgumentException(JGitText.get().cannotMatchOnEmptyString);
- if (SubStringRevFilter.safe(pattern))
- return new SubStringSearch(pattern);
- return new PatternSearch(pattern);
- }
-
- private MessageRevFilter() {
- // Don't permit us to be created.
- }
-
- static RawCharSequence textFor(final RevCommit cmit) {
- final byte[] raw = cmit.getRawBuffer();
- final int b = RawParseUtils.commitMessage(raw, 0);
- if (b < 0)
- return RawCharSequence.EMPTY;
- return new RawCharSequence(raw, b, raw.length);
- }
-
- private static class PatternSearch extends PatternMatchRevFilter {
- PatternSearch(final String patternText) {
- super(patternText, true, true, Pattern.CASE_INSENSITIVE
- | Pattern.DOTALL);
- }
-
- @Override
- protected CharSequence text(final RevCommit cmit) {
- return textFor(cmit);
- }
-
- @Override
- public RevFilter clone() {
- return new PatternSearch(pattern());
- }
- }
-
- private static class SubStringSearch extends SubStringRevFilter {
- SubStringSearch(final String patternText) {
- super(patternText);
- }
-
- @Override
- protected RawCharSequence text(final RevCommit cmit) {
- return textFor(cmit);
- }
- }
- }
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