org.deegree.crs.transformations
Class ConcatenatedTransform

java.lang.Object
  org.deegree.crs.Identifiable
      org.deegree.crs.transformations.CRSTransformation
          org.deegree.crs.transformations.ConcatenatedTransform

public class ConcatenatedTransform
extends CRSTransformation

The ConcatenatedTransform class allows the connection of two transformations.

Calling inverse on this transformation will invert the whole underlying transformation chain. For example, if A * (B *C)=D and D is this transformation calling D.inverse() will result in (C.inverse * B.inverse) * A.inverse.

Version:

$Revision:$, $Date:$

Author:

Rutger Bezema, last edited by: $Author:$

Field Summary

(package private) boolean

isIdentitiy

Fields inherited from class org.deegree.crs.transformations.CRSTransformation

isInverse

Constructor Summary

ConcatenatedTransform(CRSTransformation first, CRSTransformation second)
Creates a transformation by concatenating two existing transforms.

ConcatenatedTransform(CRSTransformation first, CRSTransformation second, String identifier)
Creates a transform by concatenating two existing transforms.

Method Summary

List<javax.vecmath.Point3d>	doTransform(List<javax.vecmath.Point3d> srcPts) Do a transformation, e.g. the incoming data comes from the sourceCRS and must be transformed to the targetCRS.
CRSTransformation	getFirstTransform()
CRSTransformation	getSecondTransform()
void	inverse() Call this method to indicate the transform should be inverse (or not).
boolean	isIdentity()

Methods inherited from class org.deegree.crs.transformations.CRSTransformation

areInverse, createFromTo, doTransform, doTransform, getSourceCRS, getSourceDimension, getTargetCRS, getTargetDimension, getTransformationName, getTransformationPath, isInverseTransform

Methods inherited from class org.deegree.crs.Identifiable

checkForNullObject, checkForNullObject, getAreaOfUse, getAreasOfUse, getDescription, getDescriptions, getIdAndName, getIdentifier, getIdentifiers, getName, getNames, getVersion, getVersions, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

isIdentitiy

boolean isIdentitiy

Constructor Detail

ConcatenatedTransform

public ConcatenatedTransform(CRSTransformation first,
                             CRSTransformation second,
                             String identifier)

Creates a transform by concatenating two existing transforms. A concatenated transform applies two transforms, one after the other. The dimension of the output space of the first transform must match the dimension of the input space in the second transform.

Parameters:

first - The first transformation to apply to given points.

second - The second transformation to apply to given points.

identifier -

ConcatenatedTransform

public ConcatenatedTransform(CRSTransformation first,
                             CRSTransformation second)

Creates a transformation by concatenating two existing transforms. A concatenated transform applies two transforms, one after the other. The dimension of the output space of the first transform must match the dimension of the input space in the second transform. This constructor creates an identifier with following form: FROM_id1_TO_id2. The name will be generated the same way (with getName() instead).

Parameters:

first - The first transformation to apply to given points.

second - The second transformation to apply to given points.

identifier -

name -

Method Detail

doTransform

public List<javax.vecmath.Point3d> doTransform(List<javax.vecmath.Point3d> srcPts)

Description copied from class: CRSTransformation

Do a transformation, e.g. the incoming data comes from the sourceCRS and must be transformed to the targetCRS.

Specified by:

doTransform in class CRSTransformation

Parameters:

srcPts - the points which must be transformed, expected are following values either, long_1, lat_1, height_1, long_2, lat_2, height_2. or long_1, lat_1, long_2, lat_2

Returns:

the transformed points

inverse

public void inverse()

Description copied from class: CRSTransformation

Call this method to indicate the transform should be inverse (or not).

Overrides:

inverse in class CRSTransformation

isIdentity

public boolean isIdentity()

Specified by:

isIdentity in class CRSTransformation

Returns:

true if this transformation doesn't transform the incoming points. (e.g. is the id. matrix)

getFirstTransform

public final CRSTransformation getFirstTransform()

Returns:

the firstTransform, which is the second transformation if this transform is inverse.

getSecondTransform

public final CRSTransformation getSecondTransform()

Returns:

the secondTransform, which is the first transformation if this transform is inverse.