org.jaitools.imageutils.shape
Class GeomCollectionIterator

java.lang.Object
  extended by org.jaitools.imageutils.shape.AbstractLiteIterator
      extended by org.jaitools.imageutils.shape.GeomCollectionIterator
All Implemented Interfaces:
PathIterator

public final class GeomCollectionIterator
extends AbstractLiteIterator

A path iterator for the LiteShape class, specialized to iterate over a geometry collection. It can be seen as a composite, since uses in fact other, simpler iterator to carry on its duties. This class was ported back and simplified from GeoTools, with permission from the author(s)

Author:
Andrea Aime

Field Summary
 
Fields inherited from class org.jaitools.imageutils.shape.AbstractLiteIterator
dcoords
 
Fields inherited from interface java.awt.geom.PathIterator
SEG_CLOSE, SEG_CUBICTO, SEG_LINETO, SEG_MOVETO, SEG_QUADTO, WIND_EVEN_ODD, WIND_NON_ZERO
 
Constructor Summary
GeomCollectionIterator()
           
GeomCollectionIterator(com.vividsolutions.jts.geom.GeometryCollection gc, AffineTransform at)
          Creates a new instance of GeomCollectionIterator
 
Method Summary
 int currentSegment(double[] coords)
          Returns the coordinates and type of the current path segment in the iteration.
 int currentSegment(float[] coords)
          Returns the coordinates and type of the current path segment in the iteration.
 int getWindingRule()
          Returns the winding rule for determining the interior of the path.
 void init(com.vividsolutions.jts.geom.GeometryCollection gc, AffineTransform at)
           
 boolean isDone()
          Tests if the iteration is complete.
 void next()
          Moves the iterator to the next segment of the path forwards along the primary direction of traversal as long as there are more points in that direction.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

GeomCollectionIterator

public GeomCollectionIterator()

GeomCollectionIterator

public GeomCollectionIterator(com.vividsolutions.jts.geom.GeometryCollection gc,
                              AffineTransform at)
Creates a new instance of GeomCollectionIterator

Parameters:
gc - The geometry collection the iterator will use
at - The affine transform applied to coordinates during iteration distance from the previous is less than maxDistance
Method Detail

init

public void init(com.vividsolutions.jts.geom.GeometryCollection gc,
                 AffineTransform at)
Parameters:
gc -
at -

currentSegment

public int currentSegment(double[] coords)
Returns the coordinates and type of the current path segment in the iteration. The return value is the path-segment type: SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE. A double array of length 6 must be passed in and can be used to store the coordinates of the point(s). Each point is stored as a pair of double x,y coordinates. SEG_MOVETO and SEG_LINETO types returns one point, SEG_QUADTO returns two points, SEG_CUBICTO returns 3 points and SEG_CLOSE does not return any points.

Parameters:
coords - an array that holds the data returned from this method
Returns:
the path-segment type of the current path segment.
See Also:
PathIterator.SEG_MOVETO, PathIterator.SEG_LINETO, PathIterator.SEG_QUADTO, PathIterator.SEG_CUBICTO, PathIterator.SEG_CLOSE

currentSegment

public int currentSegment(float[] coords)
Returns the coordinates and type of the current path segment in the iteration. The return value is the path-segment type: SEG_MOVETO, SEG_LINETO, SEG_QUADTO, SEG_CUBICTO, or SEG_CLOSE. A float array of length 6 must be passed in and can be used to store the coordinates of the point(s). Each point is stored as a pair of float x,y coordinates. SEG_MOVETO and SEG_LINETO types returns one point, SEG_QUADTO returns two points, SEG_CUBICTO returns 3 points and SEG_CLOSE does not return any points.

Specified by:
currentSegment in interface PathIterator
Overrides:
currentSegment in class AbstractLiteIterator
Parameters:
coords - an array that holds the data returned from this method
Returns:
the path-segment type of the current path segment.
See Also:
PathIterator.SEG_MOVETO, PathIterator.SEG_LINETO, PathIterator.SEG_QUADTO, PathIterator.SEG_CUBICTO, PathIterator.SEG_CLOSE

getWindingRule

public int getWindingRule()
Returns the winding rule for determining the interior of the path.

Returns:
the winding rule.
See Also:
PathIterator.WIND_EVEN_ODD, PathIterator.WIND_NON_ZERO

isDone

public boolean isDone()
Tests if the iteration is complete.

Returns:
true if all the segments have been read; false otherwise.

next

public void next()
Moves the iterator to the next segment of the path forwards along the primary direction of traversal as long as there are more points in that direction.



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