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- /*
- * Copyright (C) 2009, Christian Halstrick <christian.halstrick@sap.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.diff;
-
- public class DiffTestDataGenerator {
- /**
- * Generate sequence of characters in ascending order. The first character
- * is a space. All subsequent characters have an ASCII code one greater then
- * the ASCII code of the preceding character. On exception: the character
- * following which follows '~' is again a ' '.
- *
- * @param len
- * length of the String to be returned
- * @return the sequence of characters as String
- */
- public static String generateSequence(int len) {
- return generateSequence(len, 0, 0);
- }
-
- /**
- * Generate sequence of characters similar to the one returned by
- * {@link #generateSequence(int)}. But this time in each chunk of
- * <skipPeriod> characters the last <skipLength> characters are left out. By
- * calling this method twice with two different prime skipPeriod values and
- * short skipLength values you create test data which is similar to what
- * programmers do to their source code - huge files with only few
- * insertions/deletions/changes.
- *
- * @param len
- * length of the String to be returned
- * @param skipPeriod
- * @param skipLength
- * @return the sequence of characters as String
- */
- public static String generateSequence(int len, int skipPeriod,
- int skipLength) {
- StringBuilder text = new StringBuilder(len);
- int skipStart = skipPeriod - skipLength;
- int skippedChars = 0;
- for (int i = 0; i - skippedChars < len; ++i) {
- if (skipPeriod == 0 || i % skipPeriod < skipStart) {
- text.append((char) (32 + i % 95));
- } else {
- skippedChars++;
- }
- }
- return text.toString();
- }
- }
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