PreparedPolygonCovers

java.lang.Object
- org.locationtech.jts.geom.prep.PreparedPolygonPredicate
- - org.locationtech.jts.geom.prep.AbstractPreparedPolygonContains
  - - org.locationtech.jts.geom.prep.PreparedPolygonCovers

```
class PreparedPolygonCovers
extends AbstractPreparedPolygonContains
```
Computes the covers spatial relationship predicate for a PreparedPolygon relative to all other Geometry classes. Uses short-circuit tests and indexing to improve performance.
It is not possible to short-circuit in all cases, in particular in the case where the test geometry touches the polygon linework. In this case full topology must be computed.

Field Summary
- Fields inherited from class org.locationtech.jts.geom.prep.AbstractPreparedPolygonContains
  requireSomePointInInterior
- Fields inherited from class org.locationtech.jts.geom.prep.PreparedPolygonPredicate
  prepPoly

Constructor Summary

Constructors
Constructor Description

PreparedPolygonCovers(PreparedPolygon prepPoly)
Creates an instance of this operation.

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`boolean`	`covers(Geometry geom)`	Tests whether this PreparedPolygon `covers` a given geometry.
`static boolean`	`covers(PreparedPolygon prep, Geometry geom)`	Computes the covers predicate between a `PreparedPolygon` and a `Geometry`.
`protected boolean`	`fullTopologicalPredicate(Geometry geom)`	Computes the full topological `covers` predicate.

Methods inherited from class org.locationtech.jts.geom.prep.AbstractPreparedPolygonContains
eval

Methods inherited from class org.locationtech.jts.geom.prep.PreparedPolygonPredicate
isAllTestComponentsInTarget, isAllTestComponentsInTargetInterior, isAnyTargetComponentInAreaTest, isAnyTestComponentInTarget, isAnyTestComponentInTargetInterior

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - PreparedPolygonCovers
```
public PreparedPolygonCovers(PreparedPolygon prepPoly)
```
    Creates an instance of this operation.
    
    Parameters:
    
    prepPoly - the PreparedPolygon to evaluate
- Method Detail
  - covers
```
public static boolean covers(PreparedPolygon prep,
                             Geometry geom)
```
    Computes the covers predicate between a PreparedPolygon and a Geometry.
    
    Parameters:
    
    prep - the prepared polygon
    
    geom - a test geometry
    
    Returns:
    
    true if the polygon covers the geometry
  - covers
```
public boolean covers(Geometry geom)
```
    Tests whether this PreparedPolygon covers a given geometry.
    
    Parameters:
    
    geom - the test geometry
    
    Returns:
    
    true if the test geometry is covered
  - fullTopologicalPredicate
```
protected boolean fullTopologicalPredicate(Geometry geom)
```
    Computes the full topological covers predicate. Used when short-circuit tests are not conclusive.
    
    Specified by:
    
    fullTopologicalPredicate in class AbstractPreparedPolygonContains
    
    Parameters:
    
    geom - the test geometry
    
    Returns:
    
    true if this prepared polygon covers the test geometry