/*
* GeoTools - The Open Source Java GIS Toolkit
* http://geotools.org
*
* (C) 2005-2008, Open Source Geospatial Foundation (OSGeo)
*
* 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;
* version 2.1 of the License.
*
* 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.
*/
package org.geotools.referencing.piecewise;
import org.geotools.geometry.GeneralDirectPosition;
import org.geotools.referencing.operation.matrix.Matrix1;
import org.geotools.renderer.i18n.ErrorKeys;
import org.geotools.renderer.i18n.Errors;
import org.geotools.util.Utilities;
import org.opengis.geometry.DirectPosition;
import org.opengis.geometry.MismatchedDimensionException;
import org.opengis.referencing.operation.MathTransform1D;
import org.opengis.referencing.operation.Matrix;
import org.opengis.referencing.operation.NoninvertibleTransformException;
import org.opengis.referencing.operation.TransformException;
/**
* Convenience implementation of the {@link PiecewiseTransform1D} interface which subclass the {@link DefaultDomain1D} class in order to provide a suitable framework to handle a list of {@link PiecewiseTransform1DElement} s. <p>
* @author Simone Giannecchini, GeoSolutions
*
*
* @source $URL$
*/
public class DefaultPiecewiseTransform1D<T extends DefaultPiecewiseTransform1DElement> extends DefaultDomain1D<T>
implements PiecewiseTransform1D<T> {
private boolean hasDefaultValue;
/**
* @uml.property name="defaultValue"
*/
private double defaultValue;
private int hashCode=-1;
public DefaultPiecewiseTransform1D(
final T[] domainElements,
final double defaultValue) {
super(domainElements);
this.hasDefaultValue=true;
this.defaultValue=defaultValue;
}
public DefaultPiecewiseTransform1D(final T[] domainElements) {
super(
domainElements != null && !(domainElements instanceof DefaultConstantPiecewiseTransformElement[]) ?
domainElements :
null);
}
/*
* (non-Javadoc)
*
* @see org.opengis.referencing.operation.MathTransform1D#transform(double)
*/
public double transform(final double value) throws TransformException {
final T piece = findDomainElement(value);
if (piece == null) {
//do we have a default value?
if(hasDefaultValue())
return getDefaultValue();
throw new TransformException(Errors.format(ErrorKeys.TRANSFORM_EVALUATION_$1,new Double(value)));
}
return piece.transform(value);
}
/**
* Gets the derivative of this transform at a point.
*/
public Matrix derivative(final DirectPosition point)
throws TransformException {
PiecewiseUtilities.checkDimension(point);
return new Matrix1(derivative(point.getOrdinate(0)));
}
/**
* Gets the derivative of this function at a value.
*
* @param value
* The value where to evaluate the derivative.
* @return The derivative at the specified point.
* @throws TransformException
* if the derivative can't be evaluated at the specified point.
*/
public double derivative(final double value)
throws TransformException {
throw new UnsupportedOperationException(Errors.format(ErrorKeys.UNSUPPORTED_OPERATION_$1, "derivate"));
}
/**
* Gets the dimension of input points, which is 1.
*/
public final int getSourceDimensions() {
return 1;
}
/**
* Gets the dimension of output points, which is 1.
*/
public final int getTargetDimensions() {
return 1;
}
/*
* (non-Javadoc)
*
* @see org.opengis.referencing.operation.MathTransform#inverse()
*/
public MathTransform1D inverse() throws NoninvertibleTransformException {
throw new UnsupportedOperationException(Errors.format(ErrorKeys.UNSUPPORTED_OPERATION_$1, "inverse"));
}
/*
* (non-Javadoc)
*
* @see org.opengis.referencing.operation.MathTransform#isIdentity()
*/
public boolean isIdentity() {
throw new UnsupportedOperationException(Errors.format(ErrorKeys.UNSUPPORTED_OPERATION_$1, "isIdentity"));
}
/*
* (non-Javadoc)
*
* @see org.opengis.referencing.operation.MathTransform#toWKT()
*/
public String toWKT() throws UnsupportedOperationException {
throw new UnsupportedOperationException(Errors.format(ErrorKeys.UNSUPPORTED_OPERATION_$1, "toWKT"));
}
/*
* (non-Javadoc)
*
* @see org.opengis.referencing.operation.MathTransform#transform(org.opengis.spatialschema.geometry.DirectPosition,
* org.opengis.spatialschema.geometry.DirectPosition)
*/
public DirectPosition transform(final DirectPosition ptSrc,
DirectPosition ptDst) throws MismatchedDimensionException,
TransformException {
// /////////////////////////////////////////////////////////////////////
//
// input checks
//
// /////////////////////////////////////////////////////////////////////
PiecewiseUtilities.ensureNonNull("ptSrc", ptSrc);
PiecewiseUtilities.checkDimension(ptSrc);
if (ptDst == null) {
ptDst = new GeneralDirectPosition(1);
} else {
PiecewiseUtilities.checkDimension(ptDst);
}
ptDst.setOrdinate(0, transform(ptSrc.getOrdinate(0)));
return ptDst;
}
/**
* Transforms a list of coordinate point ordinal values.
*/
public void transform(final double[] srcPts, final int srcOff, final double[] dstPts,
final int dstOff, final int numPts) throws TransformException {
throw new UnsupportedOperationException(Errors.format(ErrorKeys.UNSUPPORTED_OPERATION_$1, "transform"));
}
/**
* Transforms a list of coordinate point ordinal values.
*/
public void transform(final float[] srcPts, final int srcOff, final float[] dstPts,
final int dstOff, final int numPts) throws TransformException {
throw new UnsupportedOperationException(Errors.format(ErrorKeys.UNSUPPORTED_OPERATION_$1, "transform"));
}
/**
* Transforms a list of coordinate point ordinal values.
*/
public void transform(final float[] srcPts, final int srcOff, final double[] dstPts,
final int dstOff, final int numPts) throws TransformException {
throw new UnsupportedOperationException(Errors.format(ErrorKeys.UNSUPPORTED_OPERATION_$1, "transform"));
}
/**
* Transforms a list of coordinate point ordinal values.
*/
public void transform(final double[] srcPts, final int srcOff, final float[] dstPts,
final int dstOff, final int numPts) throws TransformException {
throw new UnsupportedOperationException(Errors.format(ErrorKeys.UNSUPPORTED_OPERATION_$1, "transform"));
}
public boolean hasDefaultValue() {
return hasDefaultValue;
}
/**
* @return
* @uml.property name="defaultValue"
*/
public double getDefaultValue() {
return defaultValue;
}
@Override
public int hashCode() {
if(hashCode>=0)
return hashCode;
hashCode = 37;
hashCode = Utilities.hash( defaultValue,hashCode );
hashCode = Utilities.hash( hasDefaultValue ,hashCode);
hashCode = Utilities.hash( super.hashCode(),hashCode );
return hashCode;
}
@SuppressWarnings("unchecked")
@Override
public boolean equals(Object object) {
if((object instanceof DefaultPiecewiseTransform1D))
{
final DefaultPiecewiseTransform1D<?> that = (DefaultPiecewiseTransform1D<?>) object;
if(this.hasDefaultValue!=that.hasDefaultValue)
return false;
if(Utilities.equals(defaultValue, that.defaultValue));
return false;
}
return super.equals(object);
}
protected Class<?> getEquivalenceClass(){
return DefaultPiecewiseTransform1D.class;
}
}