- package com.sun.org.apache.regexp.internal;
-
- /*
- * ====================================================================
- *
- * The Apache Software License, Version 1.1
- *
- * Copyright (c) 1999 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. 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.
- *
- * 3. The end-user documentation included with the redistribution, if
- * any, must include the following acknowlegement:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowlegement may appear in the software itself,
- * if and wherever such third-party acknowlegements normally appear.
- *
- * 4. The names "The Jakarta Project", "Jakarta-Regexp", and "Apache Software
- * Foundation" must not be used to endorse or promote products derived
- * from this software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 APACHE SOFTWARE FOUNDATION OR
- * ITS 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.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- *
- */
-
- 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>
- *
- * // 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);
- *
- * </pre>
- *
- * 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:
- *
- * <pre>
- *
- * RE r = new RE(re1);
- *
- * </pre>
- *
- * @see RE
- * @see RECompiler
- *
- * @author <a href="mailto:jonl@muppetlabs.com">Jonathan Locke</a>
- * @version $Id: recompile.java,v 1.1 2000/04/27 01:22:33 jon Exp $
- */
- 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 <patternname> <pattern>");
- System.exit(0);
- }
-
- // Loop through arguments, compiling each
- for (int i = 0; i < arg.length; i += 2)
- {
- try
- {
- // Compile regular expression
- String name = arg[i];
- String pattern = arg[i+1];
- String instructions = name + "PatternInstructions";
-
- // Output program as a nice, formatted character array
- System.out.print("\n // Pre-compiled regular expression '" + pattern + "'\n"
- + " private static char[] " + instructions + " = \n {");
-
- // Compile program for pattern
- REProgram program = r.compile(pattern);
-
- // Number of columns in output
- int numColumns = 7;
-
- // Loop through program
- char[] p = program.getInstructions();
- for (int j = 0; j < p.length; j++)
- {
- // End of column?
- if ((j % numColumns) == 0)
- {
- System.out.print("\n ");
- }
-
- // Print character as padded hex number
- String hex = Integer.toHexString(p[j]);
- while (hex.length() < 4)
- {
- hex = "0" + hex;
- }
- System.out.print("0x" + hex + ", ");
- }
-
- // End of program block
- System.out.println("\n };");
- System.out.println("\n private static RE " + name + "Pattern = new RE(new REProgram(" + instructions + "));");
- }
- catch (RESyntaxException e)
- {
- System.out.println("Syntax error in expression \"" + arg[i] + "\": " + e.toString());
- }
- catch (Exception e)
- {
- System.out.println("Unexpected exception: " + e.toString());
- }
- catch (Error e)
- {
- System.out.println("Internal error: " + e.toString());
- }
- }
- }
- }