/*
* Copyright (C) 2012 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.crsh.lang.impl.script;
import org.crsh.shell.ErrorKind;
import org.crsh.shell.impl.command.spi.CommandException;
import org.crsh.util.Utils;
/**
* @author Julien Viet
*/
public class Token {
/** . */
public final String value;
/** . */
public final Token next;
public Token(String value, Token next) {
if (value == null) {
throw new NullPointerException("No null value");
}
this.value = value;
this.next = next;
}
public PipeLineFactory createFactory() throws CommandException {
if (next != null) {
PipeLineFactory nextFactory = next.createFactory();
if (nextFactory != null) {
return new PipeLineFactory(value, nextFactory);
} else {
throw new CommandException(ErrorKind.SYNTAX, "");
}
} else {
return Utils.notBlank(value) ? new PipeLineFactory(value, null) : null;
}
}
public Token getLast() {
return next != null ? next.getLast() : this;
}
public static Token parse(CharSequence s) {
return parse(s, 0);
}
public static Token parse(final CharSequence s, final int index) {
Character lastQuote = null;
int pos = index;
while (pos < s.length()) {
char c = s.charAt(pos);
if (lastQuote == null) {
if (c == '|') {
break;
} else if (c == '"' || c == '\'') {
lastQuote = c;
}
} else {
if (lastQuote == c) {
lastQuote = null;
} }
pos++;
}
Token next = pos < s.length() ? parse(s, pos + 1) : null;
return new Token(s.subSequence(index, pos).toString(), next);
}
}