Package com.esri.core.geometry
Class ListeningGeometryCursor
java.lang.Object
com.esri.core.geometry.GeometryCursor
com.esri.core.geometry.ListeningGeometryCursor
A GeometryCursor implementation that allows pushing geometries into it.
To be used with aggregating operations, OperatorUnion and OperatorConvexHull,
when the geometries are not available at the time of the execute method call,
but are coming in a stream.
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Field Summary
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionint
Returns the ID of the current geometry.next()
Moves the cursor to the next Geometry.void
Call this method to add geometry to the cursor.Methods inherited from class com.esri.core.geometry.GeometryCursor
tock
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Field Details
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m_geomList
LinkedList<Geometry> m_geomList -
m_index
int m_index
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Constructor Details
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ListeningGeometryCursor
public ListeningGeometryCursor()
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Method Details
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getGeometryID
public int getGeometryID()Description copied from class:GeometryCursor
Returns the ID of the current geometry. The ID is propagated across the operations (when possible). Returns an ID associated with the current Geometry. The ID is passed along and is returned by some operators to preserve relationship between the input and output geometry classes. It is not always possible to preserve an ID during an operation.- Specified by:
getGeometryID
in classGeometryCursor
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next
Description copied from class:GeometryCursor
Moves the cursor to the next Geometry. Returns null when reached the end. The behavior of the cursor is undefined after the method returns null.- Specified by:
next
in classGeometryCursor
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tick
Call this method to add geometry to the cursor. After this method is called, call immediately the tock() method on the GeometryCursor returned by the OperatorUnion (or OperatorConvexHull with b_merge == true). Call next() on the GeometryCursor returned by the OperatorUnion when done listening to incoming geometries to finish the union operation.- Parameters:
geom
- The geometry to be pushed into the cursor.
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