com.esri.arcgis.geometry
Interface IRing

All Superinterfaces:

ICurve, IGeometry, IPath, java.io.Serializable

All Known Subinterfaces:

IRing2

All Known Implementing Classes:

IRing2Proxy, IRingProxy, Ring

public interface IRing

extends IPath, java.io.Serializable

Provides access to members that identify a ring and define its behavior.

Product Availability

Available with ArcGIS Engine, ArcGIS Desktop, and ArcGIS Server.

Supported Platforms

Windows, Solaris, Linux

Description

A Ring is Closed Path that defines a Two Dimensional Area. A valid Ring consists of a valid Path such that the From and To Points of the Ring have the same X and Y coordinates. A clockwise Ring is an Exterior Ring and a counterclockwise Ring defines an Interior Ring.

See Also:

IPath, IGeometry

Method Summary

void	close() Makes sure that this ring is closed by adding a line segment between the ring's 'to' and 'from' points if necessary.
ICurve	getSubcurveEx(double fromDistance, double toDistance, boolean asRatio, boolean isCCW, boolean useRingOrientation) Extracts a portion of this curve into a new curve.
boolean	isExterior() Indicates if this ring can function as the exterior ring in a polygon (ring orientation is clockwise, area > 0).
boolean	reshape(IPath reshapeSource) Modifies this ring by replacing some of its segments with some segments from reshapeSource.

Methods inherited from interface com.esri.arcgis.geometry.IPath

generalize, queryChordLengthTangents, setChordLengthTangents, smooth, smoothLocal

Methods inherited from interface com.esri.arcgis.geometry.ICurve

getFromPoint, getLength, getSubcurve, getToPoint, isClosed, queryFromPoint, queryNormal, queryPoint, queryPointAndDistance, queryTangent, queryToPoint, reverseOrientation, setFromPoint, setToPoint

Methods inherited from interface com.esri.arcgis.geometry.IGeometry

geoNormalize, geoNormalizeFromLongitude, getDimension, getEnvelope, getGeometryType, getSpatialReference, isEmpty, project, queryEnvelope, setEmpty, setSpatialReferenceByRef, snapToSpatialReference

Method Detail

isExterior

public boolean isExterior()
                   throws java.io.IOException,
                          AutomationException

Indicates if this ring can function as the exterior ring in a polygon (ring orientation is clockwise, area > 0).

Returns:

The isExterior

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

reshape

public boolean reshape(IPath reshapeSource)
                throws java.io.IOException,
                       AutomationException

Modifies this ring by replacing some of its segments with some segments from reshapeSource.

Supported Platforms

Windows, Solaris, Linux

Description

Reshape replaces the Segments in the Ring between consecutive Intersections with the input Path segments that connect those intersections. Reshape returns a boolean indicating whether or not a modification to the Ring occurred.

Remarks

To Reshape a Polygon, the Polygon must be Reshaped one Ring at a time.

Parameters:

reshapeSource - A reference to a com.esri.arcgis.geometry.IPath (in)

Returns:

The reshapeHappened

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

close

public void close()
           throws java.io.IOException,
                  AutomationException

Makes sure that this ring is closed by adding a line segment between the ring's 'to' and 'from' points if necessary.

Supported Platforms

Windows, Solaris, Linux

Description

Checks whether or not the From and To Points of the Path occur at the same Point. If the From and To Point have the same X and Y coordinates, the Ring is considered closed, and no action is taken. However, if the From and To Points are not at the same X and Y coordinates, a Line segment is added at the end of the Ring between the To Point and the From Point. This Line segment completes the Ring making it closed.

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.

getSubcurveEx

public ICurve getSubcurveEx(double fromDistance,
                            double toDistance,
                            boolean asRatio,
                            boolean isCCW,
                            boolean useRingOrientation)
                     throws java.io.IOException,
                            AutomationException

Extracts a portion of this curve into a new curve. The interior of the new curve may contain the from/to point of the ring when useRingOrientation is true.

Supported Platforms

Windows, Solaris, Linux

Description

The GetSubCurveEx method creates a subcurve of a ring. The subcurve may include the ring origin. The result is always a path object which may be closed.

Remarks

Parameters description:

fromDistance: (Input) A double that represents the distance along the curve which will define one of the subcurve's endpoints. The value can be positive or negative.

toDistance: (Input) A double that represents the distance along the curve which will define the other endpoint of the subcurve. The value can be positive or negative.

If the fromDistance and toDistance values are equal, the output is a closed path with fromPoint and toPoint of the path at the specified distance. The orientation may be reversed, depending upon the other parameter settings.

asRatio: (Input) A boolean value that determines whether or not the input distances are interpreted as a ratio of the total length. If 'True', a fromDistance of 0 is at the beginning of the curve and a toDistance of 1 represents the end of the curve.

isCCW: (Input) A boolean expression that decides which of the two possible paths fromfromDistance to toDistance is chosen for output: counter-clockwise or not. This does not decide the orientation of the output path.

useRingOrientation: (Input) A boolean that determines whether the output path should follow the ring orientation or not. If bUseRingOrientation is true, the output subcurve must have the same orientation as the ring, even if it means that the subcurve starts at toDistance and ends at fromDistance. If bUseRingOrientation is false, the output subcurve always starts at fromDistance and ends at toDistance; it may have the opposite orientation as the original ring.

Parameters:

fromDistance - The fromDistance (in)

toDistance - The toDistance (in)

asRatio - The asRatio (in)

isCCW - The isCCW (in)

useRingOrientation - The useRingOrientation (in)

Returns:

A reference to a com.esri.arcgis.geometry.ICurve

Throws:

java.io.IOException - If there are interop problems.

AutomationException - If the ArcObject component throws an exception.