001 /* 002 * Copyright (C) 2012 eXo Platform SAS. 003 * 004 * This is free software; you can redistribute it and/or modify it 005 * under the terms of the GNU Lesser General Public License as 006 * published by the Free Software Foundation; either version 2.1 of 007 * the License, or (at your option) any later version. 008 * 009 * This software is distributed in the hope that it will be useful, 010 * but WITHOUT ANY WARRANTY; without even the implied warranty of 011 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 012 * Lesser General Public License for more details. 013 * 014 * You should have received a copy of the GNU Lesser General Public 015 * License along with this software; if not, write to the Free 016 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 017 * 02110-1301 USA, or see the FSF site: http://www.fsf.org. 018 */ 019 package org.crsh.lang.impl.script; 020 021 import org.crsh.shell.ErrorKind; 022 import org.crsh.shell.impl.command.spi.CommandException; 023 import org.crsh.util.Utils; 024 025 /** 026 * @author Julien Viet 027 */ 028 public class Token { 029 030 /** . */ 031 public final String value; 032 033 /** . */ 034 public final Token next; 035 036 public Token(String value, Token next) { 037 if (value == null) { 038 throw new NullPointerException("No null value"); 039 } 040 this.value = value; 041 this.next = next; 042 } 043 044 public PipeLineFactory createFactory() throws CommandException { 045 if (next != null) { 046 PipeLineFactory nextFactory = next.createFactory(); 047 if (nextFactory != null) { 048 return new PipeLineFactory(value, nextFactory); 049 } else { 050 throw new CommandException(ErrorKind.SYNTAX, ""); 051 } 052 } else { 053 return Utils.notBlank(value) ? new PipeLineFactory(value, null) : null; 054 } 055 } 056 057 public Token getLast() { 058 return next != null ? next.getLast() : this; 059 } 060 061 public static Token parse(CharSequence s) { 062 return parse(s, 0); 063 } 064 065 public static Token parse(final CharSequence s, final int index) { 066 Character lastQuote = null; 067 int pos = index; 068 while (pos < s.length()) { 069 char c = s.charAt(pos); 070 if (lastQuote == null) { 071 if (c == '|') { 072 break; 073 } else if (c == '"' || c == '\'') { 074 lastQuote = c; 075 } 076 } else { 077 if (lastQuote == c) { 078 lastQuote = null; 079 } } 080 pos++; 081 } 082 Token next = pos < s.length() ? parse(s, pos + 1) : null; 083 return new Token(s.subSequence(index, pos).toString(), next); 084 } 085 }