1 files changed, 116 insertions, 0 deletions
diff --git a/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/filter/MessageRevFilter.java b/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/filter/MessageRevFilter.java
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index 0000000000..6ab3b1d3b0
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+++ b/org.eclipse.jgit/src/org/eclipse/jgit/revwalk/filter/MessageRevFilter.java
@@ -0,0 +1,116 @@
+/*
+ * 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 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("Cannot match on empty string.");
+		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);
+		}
+	}
+}