/*
* PreRaceParser.java
*
* Copyright 2003 (C) Chris Ward <frugal@purplewombat.co.uk>
*
* This library 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 library 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 library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Created on 18-Dec-2003
*
* Current Ver: $Revision$
*
*
*
*/
package plugin.pretokens.parser;
import pcgen.core.prereq.Prerequisite;
import pcgen.persistence.PersistenceLayerException;
import pcgen.persistence.lst.prereq.AbstractPrerequisiteListParser;
import pcgen.persistence.lst.prereq.PrerequisiteParserInterface;
/**
* A prerequisite parser class that handles the parsing of pre reach tokens.
*
*/
public class PreRaceParser extends AbstractPrerequisiteListParser implements
PrerequisiteParserInterface
{
/**
* Get the type of prerequisite handled by this token.
* @return the type of prerequisite handled by this token.
*/
@Override
public String[] kindsHandled()
{
return new String[]{"RACE"};
}
/**
* Parse the pre req list
*
* @param kind The kind of the prerequisite (less the "PRE" prefix)
* @param formula The body of the prerequisite.
* @param invertResult Whether the prerequisite should invert the result.
* @param overrideQualify
* if set true, this prerequisite will be enforced in spite
* of any "QUALIFY" tag that may be present.
* @return PreReq
* @throws PersistenceLayerException
*/
@Override
public Prerequisite parse(String kind,
String formula,
boolean invertResult,
boolean overrideQualify) throws PersistenceLayerException
{
final Prerequisite prereq = super.parse(kind, formula, invertResult, overrideQualify);
//
// Negate the race names wrapped in []'s. Then need to bump up the required number of matches
//
if (formula.indexOf('[') >= 0)
{
NegateRaceChoice(prereq);
}
return prereq;
}
private void NegateRaceChoice(Prerequisite prereq)
{
int modified = 0;
for (Prerequisite p : prereq.getPrerequisites())
{
if (p.getKind() == null) // PREMULT
{
NegateRaceChoice(p);
}
else
{
String preKey = p.getKey();
if (preKey.startsWith("[") && preKey.endsWith("]"))
{
preKey = preKey.substring(1, preKey.length() - 1);
p.setKey(preKey);
p.setOperator(p.getOperator().invert());
++modified;
}
}
}
if (modified > 0)
{
String oper = prereq.getOperand();
try
{
oper = Integer.toString(Integer.parseInt(oper) + modified);
}
catch (NumberFormatException nfe)
{
oper = "(" + oper + ")+" + Integer.toString(modified);
}
prereq.setOperand(oper);
}
}
@Override
protected boolean allowsNegate()
{
return true;
}
}