PreVariableTester.java

/*
 * PreVariable.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 19-Dec-2003
 *
 * Current Ver: $Revision$
 *
 *
 *
 */
package plugin.pretokens.test;

import pcgen.cdom.base.CDOMObject;
import pcgen.cdom.base.Constants;
import pcgen.core.Equipment;
import pcgen.core.PlayerCharacter;
import pcgen.core.prereq.AbstractPrerequisiteTest;
import pcgen.core.prereq.Prerequisite;
import pcgen.core.prereq.PrerequisiteException;
import pcgen.core.prereq.PrerequisiteTest;
import pcgen.core.prereq.PrerequisiteTestFactory;
import pcgen.core.utils.CoreUtility;

/**
 * Prerequisite test for the presence of a variable.
 */
public class PreVariableTester extends AbstractPrerequisiteTest implements PrerequisiteTest
{

	/**
	 * Get the type of prerequisite handled by this token.
	 * @return the type of prerequisite handled by this token.
	 */
    @Override
	public String kindHandled()
	{
		return "VAR"; //$NON-NLS-1$
	}

	/* (non-Javadoc)
	 * @see pcgen.core.prereq.PrerequisiteTest#passes(pcgen.core.prereq.Prerequisite, pcgen.core.Equipment)
	 */
	@Override
	public int passes(final Prerequisite prereq, final Equipment equipment,
		PlayerCharacter aPC) throws PrerequisiteException
	{
		if (aPC == null)
		{
			return 0;
		}
		final String eqVar = "EQ:" + equipment.getNonHeadedName(); //$NON-NLS-1$
		final float aVar =
			equipment.getVariableValue(prereq.getKey(), eqVar, aPC); //$NON-NLS-1$
		final float aTarget =
			equipment.getVariableValue(prereq.getOperand(), eqVar, aPC); //$NON-NLS-1$

		float runningTotal = prereq.getOperator().compare(aVar, aTarget);
		if (CoreUtility.doublesEqual(runningTotal, 0.0))
		{
			return 0;
		}
		for (Prerequisite element : prereq.getPrerequisites())
		{
			final PrerequisiteTestFactory factory =
					PrerequisiteTestFactory.getInstance();
			final PrerequisiteTest test = factory.getTest(element.getKind());
			if (test != null)
			{
				// all of the tests must pass, so just
				// assign the value here, don't add
				runningTotal = test.passes(element, equipment, aPC);
				if (CoreUtility.doublesEqual(runningTotal, 0.0))
				{
					return 0;
				}
			}
		}
		// The test has passed, but only pass 1 rather than the runningTotal 
		// as the total could be negative, and isn't running...
		return countedTotal(prereq, 1);
	}

	/* (non-Javadoc)
	 * @see pcgen.core.prereq.PrerequisiteTest#passes(pcgen.core.prereq.Prerequisite, pcgen.core.PlayerCharacter)
	 */
	@Override
	public int passes(final Prerequisite prereq, final PlayerCharacter character, CDOMObject source)
		throws PrerequisiteException
	{
		String src = (source == null) ? Constants.EMPTY_STRING : source.getQualifiedKey();
		final float aVar =
			character.getVariableValue(prereq.getKey(), src); //$NON-NLS-1$
		final float aTarget =
			character.getVariableValue(prereq.getOperand(), src); //$NON-NLS-1$

		float runningTotal = prereq.getOperator().compare(aVar, aTarget);
		if (CoreUtility.doublesEqual(runningTotal, 0.0))
		{
			return 0;
		}
		for (Prerequisite element : prereq.getPrerequisites())
		{
			final PrerequisiteTestFactory factory =
					PrerequisiteTestFactory.getInstance();
			final PrerequisiteTest test = factory.getTest(element.getKind());

			if (test != null)
			{
				// all of the tests must pass, so just
				// assign the value here, don't add
				runningTotal = test.passes(element, character, source);
				if (CoreUtility.doublesEqual(runningTotal, 0.0))
				{
					return 0;
				}
			}
		}

		// The test has passed, but only pass 1 rather than the runningTotal 
		// as the total could be negative, and isn't running...
		return countedTotal(prereq, 1);
	}

}