| /* |
| * Copyright (c) 1997, 2012, 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. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * 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. |
| */ |
| |
| package com.sun.tools.internal.xjc.util; |
| |
| import java.text.ParseException; |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * Utility class to parse a string |
| * |
| * @author Kohsuke Kawaguchi |
| */ |
| public final class StringCutter { |
| private final String original; |
| private String s; |
| private boolean ignoreWhitespace; |
| |
| public StringCutter(String s, boolean ignoreWhitespace) { |
| this.s = this.original = s; |
| this.ignoreWhitespace = ignoreWhitespace; |
| } |
| |
| public void skip(String regexp) throws ParseException { |
| next(regexp); |
| } |
| |
| public String next(String regexp) throws ParseException { |
| trim(); |
| Pattern p = Pattern.compile(regexp); |
| Matcher m = p.matcher(s); |
| if(m.lookingAt()) { |
| String r = m.group(); |
| s = s.substring(r.length()); |
| trim(); |
| return r; |
| } else |
| throw error(); |
| } |
| |
| private ParseException error() { |
| return new ParseException(original,original.length()-s.length()); |
| } |
| |
| public String until(String regexp) throws ParseException { |
| Pattern p = Pattern.compile(regexp); |
| Matcher m = p.matcher(s); |
| if(m.find()) { |
| String r = s.substring(0,m.start()); |
| s = s.substring(m.start()); |
| if(ignoreWhitespace) |
| r = r.trim(); |
| return r; |
| } else { |
| // return everything left |
| String r = s; |
| s = ""; |
| return r; |
| } |
| } |
| |
| public char peek() { |
| return s.charAt(0); |
| } |
| |
| private void trim() { |
| if(ignoreWhitespace) |
| s = s.trim(); |
| } |
| |
| public int length() { |
| return s.length(); |
| } |
| } |