org.geotools.filter

Class FidFilterImpl

Object

FilterAbstract

AbstractFilter

FidFilterImpl

All Implemented Interfaces:

FilterType, Filter, Id

public class FidFilterImpl
extends AbstractFilter
implements Id

Defines a ID filter, which holds a list of IDs ( usually feature id;s ). This filter stores a series of IDs, which are used to distinguish features uniquely.

Please note that addAllFids( Collection ) may be a performance hog; uDig makes use of its own implementation of FidFilter in order to reuse the internal set of fids between uses.

Author:

Rob Hranac, TOPP, Justin Deoliveira, TOPP

TODO: this class shoul be renamed to IdFilterImpl

Field Summary

Fields inherited from interface Filter

EXCLUDE, INCLUDE

Fields inherited from interface FilterType

ALL, BETWEEN, COMPARE_EQUALS, COMPARE_GREATER_THAN, COMPARE_GREATER_THAN_EQUAL, COMPARE_LESS_THAN, COMPARE_LESS_THAN_EQUAL, COMPARE_NOT_EQUALS, FID, GEOMETRY_BBOX, GEOMETRY_BEYOND, GEOMETRY_CONTAINS, GEOMETRY_CROSSES, GEOMETRY_DISJOINT, GEOMETRY_DWITHIN, GEOMETRY_EQUALS, GEOMETRY_INTERSECTS, GEOMETRY_OVERLAPS, GEOMETRY_TOUCHES, GEOMETRY_WITHIN, LIKE, LOGIC_AND, LOGIC_NOT, LOGIC_OR, NONE, NULL

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FidFilterImpl(Set<? extends Identifier> fids) Constructor which takes Identifier, not String.

Method Summary

Modifier and Type	Method and Description
Object	accept(FilterVisitor visitor, Object extraData) Used by FilterVisitors to perform some action on this filter instance.
void	addAllFids(Collection fidsToAdd) Adds a collection of feature IDs to the filter.
void	addFid(String fid) Adds a feature ID to the filter.
boolean	equals(Object filter) Returns a flag indicating object equality.
boolean	evaluate(Object feature) Determines whether or not the given feature's ID matches this filter.
Set<String>	getFidsSet() Accessor method for fid set as Strings.
Set<Identifier>	getIdentifiers() Returns the set of identifiers used by this filter.
Set<Object>	getIDs() Set of IDs representing the Identifiers used by this filter.
int	hashCode() Override of hashCode method.
void	removeAllFids(Collection fidsToRemove) Removes a collection of feature IDs from the filter.
void	removeFid(String fid) Removes a feature ID from the filter.
void	setIDs(Set ids)
String	toString() Returns a string representation of this filter.

Methods inherited from class AbstractFilter

isCompareFilter, isGeometryDistanceFilter, isGeometryFilter, isLogicFilter, isMathFilter, isSimpleFilter

Methods inherited from class FilterAbstract

accepts, eval, eval

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

FidFilterImpl

protected FidFilterImpl(Set<? extends Identifier> fids)

Constructor which takes Identifier, not String.

Method Detail

getIDs

public Set<Object> getIDs()

Description copied from interface: Id

Set of IDs representing the Identifiers used by this filter.

Specified by:

getIDs in interface Id

See Also:

Id.getIDs()

getIdentifiers

public Set<Identifier> getIdentifiers()

Description copied from interface: Id

Returns the set of identifiers used by this filter.

Specified by:

getIdentifiers in interface Id

See Also:

Id.getIdentifiers()

setIDs

public void setIDs(Set ids)

See Also:

org.opengis.filter.identity.FeatureId#setIDs(Set)

getFidsSet

public Set<String> getFidsSet()

Accessor method for fid set as Strings.

Returns:

the internally stored fids.

addFid

public final void addFid(String fid)

Adds a feature ID to the filter.

Parameters:

fid - A single feature ID.

addAllFids

public void addAllFids(Collection fidsToAdd)

Adds a collection of feature IDs to the filter.

Parameters:

fidsToAdd - A collection of feature IDs as strings.

removeFid

public final void removeFid(String fid)

Removes a feature ID from the filter.

Parameters:

fid - A single feature ID.

removeAllFids

public void removeAllFids(Collection fidsToRemove)

Removes a collection of feature IDs from the filter.

Parameters:

fidsToRemove - A collection of feature IDs.

evaluate

public boolean evaluate(Object feature)

Determines whether or not the given feature's ID matches this filter.

In order to get the object's ID, the PropertyAccessor capable of dealing with feature has to support the request of the expression "@id"

Specified by:

evaluate in interface Filter

Parameters:

feature - Specified feature to examine.

Returns:

true if the feature's ID matches an fid held by this filter, false otherwise.

See Also:

SimpleFeaturePropertyAccessorFactory

toString

public String toString()

Returns a string representation of this filter.

Overrides:

toString in class Object

Returns:

String representation of the compare filter.

accept

public Object accept(FilterVisitor visitor,
                     Object extraData)

Used by FilterVisitors to perform some action on this filter instance. Typicaly used by Filter decoders, but may also be used by any thing which needs infomration from filter structure. Implementations should always call: visitor.visit(this); It is importatant that this is not left to a parent class unless the parents API is identical.

Specified by:

accept in interface Filter

Parameters:

visitor - The visitor which requires access to this filter, the method must call visitor.visit(this);

equals

public boolean equals(Object filter)

Returns a flag indicating object equality.

Overrides:

equals in class Object

Parameters:

filter - the filter to test equality on.

Returns:

String representation of the compare filter.

hashCode

public int hashCode()

Override of hashCode method.

Overrides:

hashCode in class Object

Returns:

a hash code value for this fid filter object.