/* * reserved comment block * DO NOT REMOVE OR ALTER! */ /* * Copyright 1999-2004 The Apache Software Foundation. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.sun.org.apache.regexp.internal; import com.sun.org.apache.regexp.internal.RECompiler; import com.sun.org.apache.regexp.internal.RESyntaxException; /** * 'recompile' is a command line tool that pre-compiles one or more regular expressions * for use with the regular expression matcher class 'RE'. For example, the command * "java recompile a*b" produces output like this: * *
* * // Pre-compiled regular expression "a*b" * char[] re1Instructions = * { * 0x007c, 0x0000, 0x001a, 0x007c, 0x0000, 0x000d, 0x0041, * 0x0001, 0x0004, 0x0061, 0x007c, 0x0000, 0x0003, 0x0047, * 0x0000, 0xfff6, 0x007c, 0x0000, 0x0003, 0x004e, 0x0000, * 0x0003, 0x0041, 0x0001, 0x0004, 0x0062, 0x0045, 0x0000, * 0x0000, * }; * * REProgram re1 = new REProgram(re1Instructions); * ** * By pasting this output into your code, you can construct a regular expression matcher * (RE) object directly from the pre-compiled data (the character array re1), thus avoiding * the overhead of compiling the expression at runtime. For example: * *
* * RE r = new RE(re1); * ** * @see RE * @see RECompiler * * @author Jonathan Locke */ public class recompile { /** * Main application entrypoint. * @param arg Command line arguments */ static public void main(String[] arg) { // Create a compiler object RECompiler r = new RECompiler(); // Print usage if arguments are incorrect if (arg.length <= 0 || arg.length % 2 != 0) { System.out.println("Usage: recompile