[JGIT PATCH v2 17/24] Added the class TreeFilePattern.

@@ -0,0 +1,75 @@
+/*
+ *  Copyright (C) 2008 Florian Köberle
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU General Public
+ *  License, version 2, as published by the Free Software Foundation.
+ *
+ *  This library is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ *  General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301
+ */
+package org.spearce.jgit.treewalk.rules;
+
+import java.util.List;
+
+/**
+ * Represents a pattern like "documents/*.txt" which matches all *.txt files in
+ * the tree documents.
+ * 
+ */
+class TreeFilePattern implements FilePattern {
+
+	private final List<String> path;
+
+	private final int offset;
+
+	private final GlobalFilePattern globalFilePattern;
+
+	public boolean canMatchAtThisDirectoryLevel() {
+		return false;
+	}
+
+	TreeFilePattern(List<String> path, GlobalFilePattern globalFilePattern) {
+		this.path = path;
+		this.offset = 0;
+		this.globalFilePattern = globalFilePattern;
+	}
+
+	private TreeFilePattern(List<String> path, int offset,
+			GlobalFilePattern globalFilePattern) {
+		this.path = path;
+		this.offset = offset;
+		this.globalFilePattern = globalFilePattern;
+	}
+
+	public FilePattern getPatternForSubDirectory(String directoryName) {
+		try {
+			if (!path.get(offset).equals(directoryName)) {
+				return FilePattern.MATCH_NEVER;
+			}
+		} catch (IndexOutOfBoundsException e) {
+			throw new IllegalStateException(
+					"The offset of this class doesn't refer to a valid position in path");
+		}
+		if (offset == path.size() - 1) {
+			return globalFilePattern;
+		} else {
+			return new TreeFilePattern(path, offset + 1, globalFilePattern);
+		}
+	}
+
+	public boolean isSameForSubDirectories() {
+		return false;
+	}
+
+	public boolean match(String fileName, boolean fileIsDirectory) {
+		return false;
+	}
+
+}