/*
* PreHitDiceParser.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 java.util.StringTokenizer;
import pcgen.core.prereq.Prerequisite;
import pcgen.core.prereq.PrerequisiteOperator;
import pcgen.persistence.PersistenceLayerException;
import pcgen.persistence.lst.prereq.AbstractPrerequisiteParser;
import pcgen.persistence.lst.prereq.PrerequisiteParserInterface;
import pcgen.util.Logging;
/**
* A prerequisite parser class that handles the parsing of pre HD tokens.
*
*/
public class PreHDParser extends AbstractPrerequisiteParser 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[]{"HD", "HDSILENT"};
}
/**
* 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
{
Prerequisite prereq = super.parse(kind, formula, invertResult, overrideQualify);
if(formula.contains("MIN") || formula.contains("MAX"))
{
StringTokenizer tok = new StringTokenizer(formula, ",");
Prerequisite maxPrereq = new Prerequisite();
Prerequisite minPrereq = new Prerequisite();
boolean hasMin = false;
boolean hasMax = false;
while(tok.hasMoreTokens())
{
String value = tok.nextToken();
String[] vals = value.split("=");
if (vals.length !=2)
{
throw new PersistenceLayerException(
"PREHD must be either 'MIN=x', 'MAX=y' or "
+ "'MIN=x,MAX=y' where 'x' and 'y' are integers. '"
+ formula + "' is not valid. ");
}
String token = vals[0];
String hdVal = vals[1];
try
{
Integer.parseInt(hdVal);
}
catch (NumberFormatException nfe)
{
throw new PersistenceLayerException(
"PREHD must be either 'MIN=x', 'MAX=y' or "
+ "'MIN=x,MAX=y' where 'x' and 'y' are integers. '"
+ formula + "' is not valid: " + hdVal
+ " is not an integer");
}
if (token.equals("MIN"))
{
minPrereq.setKind("hd");
minPrereq.setOperator(PrerequisiteOperator.GTEQ);
minPrereq.setOperand(hdVal);
hasMin = true;
}
if (token.equals("MAX"))
{
maxPrereq.setKind("hd");
maxPrereq.setOperator(PrerequisiteOperator.LTEQ);
maxPrereq.setOperand(hdVal);
hasMax = true;
}
}
if (hasMin && hasMax)
{
prereq.setKind(null); // PREMULT
prereq.setOperand("2");
prereq.addPrerequisite(minPrereq);
prereq.addPrerequisite(maxPrereq);
}
else if (hasMin)
{
prereq = minPrereq;
}
else if(hasMax)
{
prereq = maxPrereq;
}
}
else
{
if (!"HDSILENT".equals(kind))
{
Logging.errorPrint("Deprecated use of PREHD found: ");
Logging.errorPrint("The PREHD:+ or PREHD:x-y syntax is no longer supported. "
+"The new format is 'MIN=x', 'MAX=y', or 'MIN=x,MAX=y' where x and y are integers. "
+"Passed formala was: " + formula);
}
processOldSyntax(formula, prereq);
}
if (invertResult)
{
prereq.setOperator(prereq.getOperator().invert());
}
return prereq;
}
/**
* @param formula
* @param prereq
* @throws PersistenceLayerException
*/
private static void processOldSyntax(
String formula,
Prerequisite prereq) throws PersistenceLayerException
{
int plusLoc = formula.indexOf('+');
if (plusLoc == -1)
{
int minusLoc = formula.indexOf('-');
if (minusLoc == -1)
{
throw new PersistenceLayerException(
"PREHD must be either 'x+' or 'x-y' where 'x' and 'y' are integers. '"
+ formula
+ "' is not valid: It does not have either a + or a -");
}
if (minusLoc != formula.lastIndexOf('-'))
{
throw new PersistenceLayerException(
"PREHD must be either 'x+' or 'x-y' where 'x' and 'y' are integers. '"
+ formula + "' is not valid: It has more than one -");
}
String hd1String = formula.substring(0, minusLoc);
String hd2String = formula.substring(minusLoc + 1);
try
{
Integer.parseInt(hd1String);
}
catch (NumberFormatException nfe)
{
throw new PersistenceLayerException(
"PREHD must be either 'x+' or 'x-y' where 'x' and 'y' are integers. '"
+ formula + "' is not valid: " + hd1String
+ " is not an integer");
}
try
{
Integer.parseInt(hd2String);
}
catch (NumberFormatException nfe)
{
throw new PersistenceLayerException(
"PREHD must be either 'x+' or 'x-y' where 'x' and 'y' are integers. '"
+ formula + "' is not valid: " + hd2String
+ " is not an integer");
}
Prerequisite minPrereq = new Prerequisite();
minPrereq.setKind("hd");
minPrereq.setOperator(PrerequisiteOperator.GTEQ);
minPrereq.setOperand(hd1String);
Prerequisite maxPrereq = new Prerequisite();
maxPrereq.setKind("hd");
maxPrereq.setOperator(PrerequisiteOperator.LTEQ);
maxPrereq.setOperand(hd2String);
prereq.setKind(null); // PREMULT
prereq.setOperand("2");
prereq.addPrerequisite(minPrereq);
prereq.addPrerequisite(maxPrereq);
}
else
{
if (plusLoc != formula.length() - 1)
{
throw new PersistenceLayerException(
"PREHD must be either 'x+' or 'x-y' where 'x' and 'y' are integers. '"
+ formula
+ "' has a + but does not end with it: It is not valid");
}
String hdString = formula.substring(0, plusLoc);
try
{
int min = Integer.parseInt(hdString);
prereq.setOperand(Integer.toString(min));
prereq.setOperator(PrerequisiteOperator.GTEQ);
}
catch (NumberFormatException nfe)
{
throw new PersistenceLayerException(
"PREHD must be either 'x+' or 'x-y' where 'x' and 'y' are integers. '"
+ formula + "' is not valid: " + hdString
+ " is not an integer");
}
}
}
}