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/*
 *
 * The CIP4 Software License, Version 1.0
 *
 *
 * Copyright (c) 2001-2007 The International Cooperation for the Integration of 
 * Processes in  Prepress, Press and Postpress (CIP4).  All rights 
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:  
 *       "This product includes software developed by the
 *        The International Cooperation for the Integration of 
 *        Processes in  Prepress, Press and Postpress (www.cip4.org)"
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "CIP4" and "The International Cooperation for the Integration of 
 *    Processes in  Prepress, Press and Postpress" must
 *    not be used to endorse or promote products derived from this
 *    software without prior written permission. For written 
 *    permission, please contact [email protected].
 *
 * 5. Products derived from this software may not be called "CIP4",
 *    nor may "CIP4" appear in their name, without prior written
 *    permission of the CIP4 organization
 *
 * Usage of this software in commercial products is subject to restrictions. For
 * details please consult [email protected].
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED.  IN NO EVENT SHALL THE INTERNATIONAL COOPERATION FOR
 * THE INTEGRATION OF PROCESSES IN PREPRESS, PRESS AND POSTPRESS OR
 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the The International Cooperation for the Integration 
 * of Processes in Prepress, Press and Postpress and was
 * originally based on software 
 * copyright (c) 1999-2001, Heidelberger Druckmaschinen AG 
 * copyright (c) 1999-2001, Agfa-Gevaert N.V. 
 *  
 * For more information on The International Cooperation for the 
 * Integration of Processes in  Prepress, Press and Postpress , please see
 * .
 *  
 * 
 */

/**
 * Copyright (c) 2001 Heidelberger Druckmaschinen AG, All Rights Reserved.
 * 
 * @author Elena Skobchenko
 *
 * JDFMatrixState.java
 *
 */

package org.cip4.jdflib.resource.devicecapability;

import java.util.Vector;
import java.util.zip.DataFormatException;

import org.apache.commons.lang.enums.ValuedEnum;
import org.apache.xerces.dom.CoreDocumentImpl;
import org.cip4.jdflib.auto.JDFAutoBasicPreflightTest.EnumListType;
import org.cip4.jdflib.auto.JDFAutoValue.EnumValueUsage;
import org.cip4.jdflib.core.AtrInfoTable;
import org.cip4.jdflib.core.AttributeInfo;
import org.cip4.jdflib.core.AttributeName;
import org.cip4.jdflib.core.ElemInfoTable;
import org.cip4.jdflib.core.ElementInfo;
import org.cip4.jdflib.core.ElementName;
import org.cip4.jdflib.core.JDFConstants;
import org.cip4.jdflib.core.JDFException;
import org.cip4.jdflib.core.VElement;
import org.cip4.jdflib.core.VString;
import org.cip4.jdflib.datatypes.JDFMatrix;
import org.cip4.jdflib.datatypes.JDFRectangle;
import org.cip4.jdflib.resource.JDFValue;
import org.cip4.jdflib.resource.devicecapability.JDFTerm.EnumTerm;
import org.cip4.jdflib.util.StringUtil;

public class JDFMatrixState extends JDFAbstractState
{
	private static final long serialVersionUID = 1L;

	private static AtrInfoTable[] atrInfoTable = new AtrInfoTable[8];
	static
	{
		atrInfoTable[0] = new AtrInfoTable(AttributeName.ALLOWEDROTATEMOD, 0x33333311, AttributeInfo.EnumAttributeType.double_, null, null);
		atrInfoTable[1] = new AtrInfoTable(AttributeName.ALLOWEDSHIFT, 0x33333311, AttributeInfo.EnumAttributeType.NumberList, null, null);
		atrInfoTable[2] = new AtrInfoTable(AttributeName.ALLOWEDTRANSFORMS, 0x33333311, AttributeInfo.EnumAttributeType.enumerations, EnumOrientation.getEnum(0), null);
		atrInfoTable[3] = new AtrInfoTable(AttributeName.CURRENTVALUE, 0x33333331, AttributeInfo.EnumAttributeType.matrix, null, null);
		atrInfoTable[4] = new AtrInfoTable(AttributeName.DEFAULTVALUE, 0x33333331, AttributeInfo.EnumAttributeType.matrix, null, null);
		atrInfoTable[5] = new AtrInfoTable(AttributeName.PRESENTROTATEMOD, 0x33333311, AttributeInfo.EnumAttributeType.double_, null, null);
		atrInfoTable[6] = new AtrInfoTable(AttributeName.PRESENTSHIFT, 0x33333311, AttributeInfo.EnumAttributeType.NumberList, null, null);
		atrInfoTable[7] = new AtrInfoTable(AttributeName.PRESENTTRANSFORMS, 0x44444431, AttributeInfo.EnumAttributeType.enumerations, EnumOrientation.getEnum(0), null);
	}

	@Override
	protected AttributeInfo getTheAttributeInfo()
	{
		return super.getTheAttributeInfo().updateReplace(atrInfoTable);
	}

	private static ElemInfoTable[] elemInfoTable = new ElemInfoTable[1];
	static
	{
		elemInfoTable[0] = new ElemInfoTable(ElementName.VALUE, 0x33333311);
	}

	@Override
	protected ElementInfo getTheElementInfo()
	{
		return new ElementInfo(super.getTheElementInfo(), elemInfoTable);
	}

	/**
	 * constructor for JDFMatrixState
	 * 
	 * @param myOwnerDocument
	 * @param qualifiedName
	 */
	public JDFMatrixState(CoreDocumentImpl myOwnerDocument, String qualifiedName)
	{
		super(myOwnerDocument, qualifiedName);
	}

	/**
	 * constructor for JDFMatrixState
	 * 
	 * @param myOwnerDocument
	 * @param myNamespaceURI
	 * @param qualifiedName
	 */
	public JDFMatrixState(CoreDocumentImpl myOwnerDocument, String myNamespaceURI, String qualifiedName)
	{
		super(myOwnerDocument, myNamespaceURI, qualifiedName);
	}

	/**
	 * @param myOwnerDocument
	 * @param myNamespaceURI
	 * @param qualifiedName
	 * @param myLocalName
	 */
	public JDFMatrixState(CoreDocumentImpl myOwnerDocument, String myNamespaceURI, String qualifiedName, String myLocalName)
	{
		super(myOwnerDocument, myNamespaceURI, qualifiedName, myLocalName);
	}

	// **************************************** Methods
	// *********************************************

	/**
	 * toString
	 * 
	 * @return String
	 */
	@Override
	public String toString()
	{
		return "JDFMatrixState[ --> " + super.toString() + " ]";
	}

	public void setCurrentValue(JDFMatrix value)
	{
		setAttribute(AttributeName.CURRENTVALUE, value.toString(), null);
	}

	public JDFMatrix getCurrentValue()
	{
		try
		{
			return new JDFMatrix(getAttribute(AttributeName.CURRENTVALUE));
		}
		catch (DataFormatException e)
		{
			throw new JDFException("JDFMatrixState.getCurrentValue: Attribute CURRENTVALUE is not capable to create JDFMatrix");
		}
	}

	public void setDefaultValue(JDFMatrix value)
	{
		setAttribute(AttributeName.DEFAULTVALUE, value.toString(), null);
	}

	public JDFMatrix getDefaultValue()
	{
		try
		{
			return new JDFMatrix(getAttribute(AttributeName.DEFAULTVALUE));
		}
		catch (DataFormatException e)
		{
			throw new JDFException("JDFMatrixState.getDefaultValue: Attribute DEFAULTVALUE is not capable to create JDFMatrix");
		}
	}

	public void setAllowedRotateMod(double value)
	{
		setAttribute(AttributeName.ALLOWEDROTATEMOD, value, null);
	}

	public double getAllowedRotateMod()
	{
		return getRealAttribute(AttributeName.ALLOWEDROTATEMOD, null, 0.0);
	}

	public void setPresentRotateMod(double value)
	{
		setAttribute(AttributeName.PRESENTROTATEMOD, value, null);
	}

	public double getPresentRotateMod()
	{
		if (hasAttribute(AttributeName.PRESENTROTATEMOD))
		{
			return getRealAttribute(AttributeName.PRESENTROTATEMOD, null, 0.0);
		}
		return getAllowedRotateMod();
	}

	public void setAllowedShift(JDFRectangle value)
	{
		setAttribute(AttributeName.ALLOWEDSHIFT, value.toString());
	}

	public JDFRectangle getAllowedShift()
	{

		try
		{
			return new JDFRectangle(getAttribute(AttributeName.ALLOWEDSHIFT, null, JDFConstants.EMPTYSTRING));
		}
		catch (DataFormatException e)
		{
			throw new JDFException("JDFMatrixState.getAllowedShift: AttributeValue not capable to create JDFRectangle");
		}
	}

	public void setPresentShift(JDFRectangle value)
	{
		setAttribute(AttributeName.PRESENTSHIFT, value.toString());
	}

	public JDFRectangle getPresentShift()
	{
		if (hasAttribute(AttributeName.PRESENTSHIFT))
		{
			try
			{
				return new JDFRectangle(getAttribute(AttributeName.PRESENTSHIFT, null, JDFConstants.EMPTYSTRING));
			}
			catch (DataFormatException e)
			{
				throw new JDFException("JDFMatrixState.getPresentShift: AttributeValue not capable to create JDFRectangle");
			}
		}
		return getAllowedShift();
	}

	public Vector getAllowedTransforms()
	{
		return getEnumerationsAttribute(AttributeName.ALLOWEDTRANSFORMS, null, EnumOrientation.getEnum(0), false);
	}

	public void setAllowedTransforms(Vector value)
	{
		setEnumerationsAttribute(AttributeName.ALLOWEDTRANSFORMS, value, null);
	}

	public Vector getPresentTransforms()
	{
		if (hasAttribute(AttributeName.PRESENTTRANSFORMS))
		{
			return getEnumerationsAttribute(AttributeName.PRESENTTRANSFORMS, null, EnumOrientation.getEnum(0), false);
		}
		return getAllowedTransforms();
	}

	public void setPresentTransforms(Vector value)
	{
		setEnumerationsAttribute(AttributeName.PRESENTTRANSFORMS, value, null);
	}

	/*
	 * // Element getter / setter
	 */

	public JDFValue getValue(int iSkip)
	{
		return (JDFValue) getElement(ElementName.VALUE, JDFConstants.EMPTYSTRING, iSkip);
	}

	public JDFValue appendValue()
	{
		return (JDFValue) appendElement(ElementName.VALUE, null);
	}

	/**
	 * Appends element Loc to the end of the iSkip'th subelement Value
	 * 
	 * @param iSkip
	 *            number of Value elements to skip (iSkip=0 - first Value
	 *            element)
	 * @return JDFLoc: newly created Loc element
	 */
	@Override
	public JDFLoc appendValueLocLoc(int iSkip)
	{
		JDFValue val = getValue(iSkip);
		if (val == null)
			return null;
		return val.appendLoc();
	}

	/*
	 * // Subelement attribute and element Getter / Setter
	 */

	/**
	 * Sets the AllowedValue attribute of the iSkip'th subelement Value
	 * 
	 * @param iSkip
	 *            the number of Value elements to skip
	 * @param value
	 *            value to set the attribute to
	 */
	public void setValueAllowedValue(int iSkip, JDFMatrix value)
	{
		JDFValue e = (JDFValue) getElement(ElementName.VALUE, null, iSkip);
		e.setAllowedValue(value.toString());
	}

	/**
	 * Gets the AllowedValue attribute of the iSkip'th subelement Value
	 * 
	 * @param iSkip
	 *            the number of Value elements to skip
	 * @return JDFMatrix: the attribute value
	 */
	public final JDFMatrix getValueAllowedValue(int iSkip)
	{
		JDFValue e = (JDFValue) getElement(ElementName.VALUE, null, iSkip);

		try
		{
			return new JDFMatrix(e.getAllowedValue());
		}
		catch (DataFormatException dfe)
		{
			throw new JDFException("JDFMatrixState.getValueAllowedValue: AttributeValue not capable to create JDFMatrix");
		}

	}

	/**
	 * Sets the ValueUsage attribute of the iSkip'th subelement Value
	 * 
	 * @param iSkip
	 *            the number of Value elements to skip
	 * @param value
	 *            value to set the attribute to
	 */
	public void setValueValueUsage(int iSkip, EnumFitsValue value)
	{
		JDFValue e = (JDFValue) getElement(ElementName.VALUE, null, iSkip);
		e.setValueUsage(EnumValueUsage.getEnum(value.getName()));
	}

	/**
	 * Gets the value of attribute ValueUsage of the iSkip'th subelement Value
	 * 
	 * @param iSkip
	 *            the number of Value elements to skip
	 * @return EnumFitsValue: the attribute value
	 */
	public final EnumFitsValue getValueValueUsage(int iSkip)
	{
		JDFValue e = (JDFValue) getElement(ElementName.VALUE, null, iSkip);
		return EnumFitsValue.getEnum(e.getValueUsage().getName());
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.cip4.jdflib.resource.devicecapability.JDFAbstractState#addValue(java
	 * .lang.String, org.cip4.jdflib.datatypes.JDFBaseDataTypes.EnumFitsValue)
	 */
	@Override
	public void addValue(String value, EnumFitsValue testlists)
	{
		if (fitsValue(value, testlists))
			return;

		try
		{
			new JDFMatrix(value);
		}
		catch (DataFormatException x)
		{
			return; // nop for bad values
		}
		if (testlists == null || EnumFitsValue.Allowed.equals(testlists))
		{
			JDFValue v = appendValue();
			v.setAllowedValue(value);
			if (testlists != null)
				v.setValueUsage(EnumValueUsage.Allowed);
		}
		if (EnumFitsValue.Present.equals(testlists))
		{
			JDFValue v = appendValue();
			v.setAllowedValue(value);
			if (testlists != null)
				v.setValueUsage(EnumValueUsage.Present);
		}
	}

	public void appendValue(JDFMatrix value, EnumFitsValue testlists)
	{
		if (testlists == null || EnumFitsValue.Allowed.equals(testlists))
		{
			JDFValue v = appendValue();
			v.setAllowedValue(value.toString());
			if (testlists != null)
				v.setValueUsage(EnumValueUsage.Allowed);
		}
		if (EnumFitsValue.Present.equals(testlists))
		{
			JDFValue v = appendValue();
			v.setAllowedValue(value.toString());
			if (testlists != null)
				v.setValueUsage(EnumValueUsage.Present);
		}
	}

	/*
	 * // FitsValue Methods
	 */

	/**
	 * fitsValue - checks whether value matches the Allowed test
	 * lists or Present test lists specified for this State
	 * 
	 * @param value
	 *            value to test
	 * @param testlists
	 *            the test lists the value has to match. In this State the test
	 *            lists are RotateMod, Shift, Transforms and ValueElem.

	 *            Choose one of two values: FitsValue_Allowed or
	 *            FitsValue_Present. (Defaults to Allowed)
	 * 
	 * @return boolean - true, if the value matches all test lists or if Allowed
	 *         test lists are not specified
	 */
	@Override
	public boolean fitsValue(String value, EnumFitsValue testlists)
	{
		VString vs = new VString(value, JDFConstants.BLANK);
		int siz = vs.size();
		if (siz % 6 != 0)
		{
			return false;
		}
		Vector matrixList = new Vector();

		for (int i = 0; i < siz; i += 6)
		{
			VString v = new VString();
			v.ensureCapacity(6);
			for (int j = 0; j < 6; j++)
				v.add(vs.get(i + j));

			try
			{
				JDFMatrix m = new JDFMatrix(StringUtil.setvString(vs, " ", null, null));
				matrixList.add(m);
			}
			catch (DataFormatException x)
			{
				return false;
			}
		}

		if (fitsListType(matrixList))
		{
			for (int k = 0; k < matrixList.size(); k++)
			{
				JDFMatrix matrix = matrixList.elementAt(k);
				if (!fitsRotateMod(matrix, testlists) || !fitsShift(matrix, testlists) || !fitsTransforms(matrix, testlists) || !fitsValueElem(matrix, testlists))
					return false;
			}
			return true;
		}
		return false;
	}

	/**
	 * fitsListType - checks whether matrixList matches the value
	 * of the ListType attribute specified for this State
	 * 
	 * @param matrixList
	 *            vector of matrices to test
	 * 
	 * @return boolean - true, if 'value' matches specified ListType
	 */
	private final boolean fitsListType(Vector matrixList)
	{
		EnumListType listType = getListType();

		int size = matrixList.size();

		if (listType.equals(EnumListType.SingleValue) || listType.equals(EnumListType.getEnum(0)))
		{// default ListType = SingleValue
			return (size == 1);
		}
		else if (listType.equals(EnumListType.List))
		{
			return true;
		}
		else if (listType.equals(EnumListType.UniqueList))
		{
			for (int i = 0; i < size; i++)
			{
				for (int j = i + 1; j < size; j++)
				{
					JDFMatrix mi = (JDFMatrix) matrixList.elementAt(i);
					JDFMatrix mj = (JDFMatrix) matrixList.elementAt(j);
					if (mi.equals(mj))
						return false;
				}
			}
			return true;
		}
		else
		{
			throw new JDFException("JDFMatrixState.fitsListType illegal ListType attribute");
		}
	}

	/**
	 * fitsValueElem - tests, if JDFMatrix matrix matches
	 * subelement Value, specified for this State
	 * 
	 * @param matrix
	 *            JDFMatrix to test
	 * @param valuelist
	 *            switches between Allowed and Present configuration in
	 *            subelement Value.
	 * 
	 * @return boolean - true, if matrix matches subelement Value
	 */
	private final boolean fitsValueElem(JDFMatrix matrix, EnumFitsValue valuelist)
	{

		VElement v = getChildElementVector(ElementName.VALUE, null, null, true, 0, false);
		int siz = v.size();
		boolean hasValue = false;
		for (int i = 0; i < siz; i++)
		{
			JDFValue elm = (JDFValue) v.elementAt(i);
			if (elm.hasAttribute(AttributeName.VALUEUSAGE))
			{
				EnumFitsValue valueUsage = getValueValueUsage(i);
				if (valuelist.equals(valueUsage))
				{
					hasValue = true;
					JDFMatrix value = getValueAllowedValue(i);
					if (value.equals(matrix))
						return true; // we have found it
				}
			}
			else
			{
				hasValue = true;
				JDFMatrix value = getValueAllowedValue(i);
				if (value.equals(matrix))
					return true; // we have found it
			}
		}
		return !hasValue; // if no matching, there was no filter
	}

	/**
	 * fitsRotateMod - checks whether matrix matches the AllowedRotateMod or
	 * PresentRotateMod, specified for this State
	 * 
	 * @param matrix
	 *            matrix to test
	 * @param rotatemod
	 *            switches between AllowedRotateMod and PresentRotateMod.
	 * @return boolean - true, if matrix matches the RotateMod or
	 *         if AllowedRotateMod is not specified
	 */
	private final boolean fitsRotateMod(JDFMatrix matrix, EnumFitsValue rotatemod)
	{
		if (rotatemod == null || rotatemod.equals(EnumFitsValue.Allowed))
		{
			if (!hasAttribute(AttributeName.ALLOWEDROTATEMOD))
				return true;
		}
		else
		{
			if (!hasAttribute(AttributeName.ALLOWEDROTATEMOD) && !hasAttribute(AttributeName.PRESENTROTATEMOD))
				return true;
		}

		double rm;
		if (rotatemod == null || rotatemod.equals(EnumFitsValue.Allowed))
		{
			rm = getAllowedRotateMod();
		}
		else
		{
			rm = getPresentRotateMod();
		}

		double a = matrix.getA();
		double b = matrix.getB();
		double c = matrix.getC();
		double d = matrix.getD();

		if ((a * d - b * c) == 0)
			return false;

		double param = a / java.lang.Math.sqrt(java.lang.Math.abs(a * d - b * c));

		if (((param - EPSILON) > 1) || ((param + EPSILON) < -1))
		{
			return false;
		}
		if (param > 1)
		{
			param = param - EPSILON;
		}
		if (param < -1)
		{
			param = param + EPSILON;
		}

		double fi = java.lang.Math.acos(param) * 180 / java.lang.Math.PI; //0~180

		double result = (fi + EPSILON) - (rm * (int) ((fi + EPSILON) / rm));
		double result180 = (fi + 180 + EPSILON) - (rm * (int) ((fi + 180 + EPSILON) / rm));

		return ((java.lang.Math.abs(result) <= 2 * EPSILON) || (java.lang.Math.abs(result180) <= 2 * EPSILON));

	}

	/**
	 * fitsShift - checks whether matrix matches the AllowedShift
	 * or PresentShift specified for this State
	 * 
	 * @param matrix
	 *            matrix to test
	 * @param shift
	 *            switches between AllowedShift and PresentShift.
	 * @return boolean - true, if matrix matches the Shift or if
	 *         AllowedShift is not specified
	 */
	private final boolean fitsShift(JDFMatrix matrix, EnumFitsValue shift)
	{

		if (shift == null || shift.equals(EnumFitsValue.Allowed))
		{
			if (!hasAttribute(AttributeName.ALLOWEDSHIFT))
				return true;
		}
		else
		{
			if (!hasAttribute(AttributeName.ALLOWEDSHIFT) && !hasAttribute(AttributeName.PRESENTSHIFT))
				return true;
		}

		JDFRectangle shiftValue;
		if (shift == null || shift.equals(EnumFitsValue.Allowed))
		{
			shiftValue = new JDFRectangle(getAllowedShift());
		}
		else
		{
			shiftValue = new JDFRectangle(getPresentShift());
		}

		double minTx = shiftValue.getLlx();
		double minTy = shiftValue.getLly();
		double maxTx = shiftValue.getUrx();
		double maxTy = shiftValue.getUry();

		double Tx = matrix.getTx();
		double Ty = matrix.getTy();

		return ((Tx >= minTx) && (Tx <= maxTx) && (Ty >= minTy) && (Ty <= maxTy));
	}

	// ////////////////////////////////////////////////////////////////////

	/**
	 * fitsTransforms - checks whether matrix matches the
	 * AllowedTransforms or PresentTransforms, specified for this State
	 * 
	 * @param matrix
	 *            matrix to test
	 * @param transforms
	 *            switches between AllowedTransforms and PresentTransforms.
	 * @return boolean - true, if matrix matches the Transforms or
	 *         if AllowedTransforms is not specified
	 */
	private final boolean fitsTransforms(JDFMatrix matrix, EnumFitsValue transforms)
	{
		if (transforms == null || transforms.equals(EnumFitsValue.Allowed))
		{
			if (!hasAttribute(AttributeName.ALLOWEDTRANSFORMS))
				return true;
		}
		else
		{
			if (!hasAttribute(AttributeName.ALLOWEDTRANSFORMS) && !hasAttribute(AttributeName.PRESENTTRANSFORMS))
				return true;
		}

		double nT = EPSILON; // negative tolerance
		double pT = EPSILON; // positive tolerance

		double a = matrix.getA();
		double b = matrix.getB();
		double c = matrix.getC();
		double d = matrix.getD();

		double det = (a * d - b * c);

		if (det == 0)
			return false;

		a = a / java.lang.Math.sqrt(java.lang.Math.abs(det));
		b = b / java.lang.Math.sqrt(java.lang.Math.abs(det));
		c = c / java.lang.Math.sqrt(java.lang.Math.abs(det));
		d = d / java.lang.Math.sqrt(java.lang.Math.abs(det));

		Vector vTransf;
		if (transforms == null || transforms.equals(EnumFitsValue.Allowed))
		{
			vTransf = getAllowedTransforms();
		}
		else
		{
			vTransf = getPresentTransforms();
		}
		int siz = vTransf.size();
		for (int i = 0; i < siz; i++)
		{
			EnumOrientation orientation = (EnumOrientation) vTransf.elementAt(i);

			if (orientation.equals(EnumOrientation.Flip0)) // a=1 b=0 c=0 d=-1
			{
				if ((a - 1 < pT) && (a - 1 > -nT) && (b < pT) && (b > -nT) && (c < pT) && (c > -nT) && (d + 1 < pT) && (d + 1 > -nT))
					return true;
				continue;
			}
			else if (orientation.equals(EnumOrientation.Flip90)) // a=0 b=-1
																	// c=-1 d=0
			{
				if ((a < pT) && (a > -nT) && (b + 1 < pT) && (b + 1 > -nT) && (c + 1 < pT) && (c + 1 > -nT) && (d < pT) && (d > -nT))
					return true;
				continue;
			}
			else if (orientation.equals(EnumOrientation.Flip180)) // a=-1 b=0
																	// c=0 d=1
			{
				if ((a + 1 < pT) && (a + 1 > -nT) && (b < pT) && (b > -nT) && (c < pT) && (c > -nT) && (d - 1 < pT) && (d - 1 > -nT))
					return true;
				continue;
			}
			else if (orientation.equals(EnumOrientation.Flip270)) // a=0 b=1
																	// c=1 d=0
			{
				if ((a < pT) && (a > -nT) && (b - 1 < pT) && (b - 1 > -nT) && (c - 1 < pT) && (c - 1 > -nT) && (d < pT) && (d > -nT))
					return true;
				continue;
			}
			else if (orientation.equals(EnumOrientation.Rotate0)) // a=1 b=0
																	// c=0 d=1
			{
				if ((a - 1 < pT) && (a - 1 > -nT) && (b < pT) && (b > -nT) && (c < pT) && (c > -nT) && (d - 1 < pT) && (d - 1 > -nT))
					return true;
				continue;
			}
			else if (orientation.equals(EnumOrientation.Rotate90)) // a=0 b=1
																	// c=-1
																	// d=0
			{
				if ((a < pT) && (a > -nT) && (b - 1 < pT) && (b - 1 > -nT) && (c + 1 < pT) && (c + 1 > -nT) && (d < pT) && (d > -nT))
					return true;
				continue;
			}
			else if (orientation.equals(EnumOrientation.Rotate180)) // a=-1
																	// b=0
																	// c=0
																	// d=-1
			{
				if ((a + 1 < pT) && (a + 1 > -nT) && (b < pT) && (b > -nT) && (c < pT) && (c > -nT) && (d + 1 < pT) && (d + 1 > -nT))
					return true;
				continue;
			}
			else if (orientation.equals(EnumOrientation.Rotate270)) // a=0
																	// b=-1
																	// c=1
																	// d=0
			{
				if ((a < pT) && (a > -nT) && (b + 1 < pT) && (b + 1 > -nT) && (c - 1 < pT) && (c - 1 > -nT) && (d < pT) && (d > -nT))
					return true;
				continue;
			}
			else
			{
				return true;
			}
		}
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.cip4.jdflib.ifaces.ICapabilityElement#getEvaluationType()
	 */
	@Override
	public EnumTerm getEvaluationType()
	{
		return EnumTerm.MatrixEvaluation;
	}

}