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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.revwalk.RevCommit;
import org.eclipse.jgit.util.RawCharSequence;
import org.eclipse.jgit.util.RawParseUtils;
/** Matches only commits whose committer name matches the pattern. */
public class CommitterRevFilter {
/**
* Create a new committer 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 author
* name and address of a commit.
*/
public static RevFilter create(String pattern) {
if (pattern.length() == 0)
throw new IllegalArgumentException("Cannot match on empty string.");
if (SubStringRevFilter.safe(pattern))
return new SubStringSearch(pattern);
return new PatternSearch(pattern);
}
private CommitterRevFilter() {
// Don't permit us to be created.
}
static RawCharSequence textFor(final RevCommit cmit) {
final byte[] raw = cmit.getRawBuffer();
final int b = RawParseUtils.committer(raw, 0);
if (b < 0)
return RawCharSequence.EMPTY;
final int e = RawParseUtils.nextLF(raw, b, '>');
return new RawCharSequence(raw, b, e);
}
private static class PatternSearch extends PatternMatchRevFilter {
PatternSearch(final String patternText) {
super(patternText, true, true, Pattern.CASE_INSENSITIVE);
}
@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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