| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code 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 |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| public class TransformUtil { |
| public static final String BeforePattern = "this-should-be-transformed"; |
| public static final String AfterPattern = "this-has-been--transformed"; |
| public static final String ParentCheckPattern = "parent-transform-check: "; |
| public static final String ChildCheckPattern = "child-transform-check: "; |
| |
| /** |
| * @return the number of occurrences of the <code>from</code> string that |
| * have been replaced. |
| */ |
| public static int replace(byte buff[], String from, String to) { |
| if (to.length() != from.length()) { |
| throw new RuntimeException("bad strings"); |
| } |
| byte f[] = asciibytes(from); |
| byte t[] = asciibytes(to); |
| byte f0 = f[0]; |
| |
| int numReplaced = 0; |
| int max = buff.length - f.length; |
| for (int i = 0; i < max; ) { |
| if (buff[i] == f0 && replace(buff, f, t, i)) { |
| i += f.length; |
| numReplaced++; |
| } else { |
| i++; |
| } |
| } |
| return numReplaced; |
| } |
| |
| public static boolean replace(byte buff[], byte f[], byte t[], int i) { |
| for (int x = 0; x < f.length; x++) { |
| if (buff[x+i] != f[x]) { |
| return false; |
| } |
| } |
| for (int x = 0; x < f.length; x++) { |
| buff[x+i] = t[x]; |
| } |
| return true; |
| } |
| |
| static byte[] asciibytes(String s) { |
| byte b[] = new byte[s.length()]; |
| for (int i = 0; i < b.length; i++) { |
| b[i] = (byte)s.charAt(i); |
| } |
| return b; |
| } |
| } |
