org.geotools.xml.filter

Class FilterEncodingPreProcessor

Object

FilterEncodingPreProcessor

All Implemented Interfaces:

FilterVisitor

public class FilterEncodingPreProcessor
extends Object
implements FilterVisitor

Prepares a filter for XML encoded for interoperability with another system. It will behave differently depending on the compliance level chosen. A new request will have to be made and the features will have to be tested again on the client side if there are any FidFilters in the filter. Consider the following to understand why:

 and {
   nullFilter
   or{
    fidFilter
    nullFilter
   }
 }
 

for strict it would throw an exception, for low it would be left alone, but for Medium it would end up as:

 and{
         nullFilter
         nullFilter
 }
 

and getFids() would return the fids in the fidFilter.

So the final filter would (this is not standard but a common implementation) return the results of the and filter as well as all the features that match the fids. Which is more than the original filter would accept.

The XML Document writer can operate at different levels of compliance. The geotools level is extremely flexible and forgiving.

All NOT(FidFilter) are changed to Filter.INCLUDE. So make sure that the filter is processed again on the client with the original filter For a description of the difference Compliance levels that can be used see

• XMLHandlerHints.VALUE_FILTER_COMPLIANCE_LOW
• XMLHandlerHints.VALUE_FILTER_COMPLIANCE_MEDIUM
• XMLHandlerHints.VALUE_FILTER_COMPLIANCE_HIGH

Author:

Jesse Eichar

Constructor Summary

Constructors

Constructor and Description
FilterEncodingPreProcessor(Integer complianceLevel)

Method Summary

Modifier and Type	Method and Description
Id	getFidFilter() Gets the fid filter that contains all the fids.
Filter	getFilter() Returns the filter that can be encoded.
boolean	requiresPostProcessing() Returns true if the filter was one where the request to the server is more general than the actual filter.
Object	visit(After after, Object extraData)
Object	visit(And filter, Object extraData)
Object	visit(AnyInteracts anyInteracts, Object extraData)
Object	visit(BBOX filter, Object extraData)
Object	visit(Before before, Object extraData)
Object	visit(Begins begins, Object extraData)
Object	visit(BegunBy begunBy, Object extraData)
Object	visit(Beyond filter, Object extraData)
void	visit(BinaryComparisonOperator filter)
void	visit(BinaryLogicOperator filter)
void	visit(BinarySpatialOperator filter)
Object	visit(Contains filter, Object extraData)
Object	visit(Crosses filter, Object extraData)
Object	visit(Disjoint filter, Object extraData)
Object	visit(During during, Object extraData)
Object	visit(DWithin filter, Object extraData)
Object	visit(EndedBy endedBy, Object extraData)
Object	visit(Ends ends, Object extraData)
Object	visit(Equals filter, Object extraData)
void	visit(ExcludeFilter filter)
Object	visit(ExcludeFilter filter, Object extraData) Visit Filter.EXCLUDE (often used during data structure transformations).
void	visit(Filter filter)
void	visit(Id filter)
Object	visit(Id filter, Object extraData)
void	visit(IncludeFilter filter)
Object	visit(IncludeFilter filter, Object extraData) Visit Filter.INCLUDE (often used during data structure transformations).
Object	visit(Intersects filter, Object extraData)
Object	visit(Meets meets, Object extraData)
Object	visit(MetBy metBy, Object extraData)
void	visit(Not filter)
Object	visit(Not filter, Object extraData)
Object	visit(Or filter, Object extraData)
Object	visit(OverlappedBy overlappedBy, Object extraData)
Object	visit(Overlaps filter, Object extraData)
void	visit(PropertyIsBetween filter)
Object	visit(PropertyIsBetween filter, Object extraData)
Object	visit(PropertyIsEqualTo filter, Object extraData)
Object	visit(PropertyIsGreaterThan filter, Object extraData)
Object	visit(PropertyIsGreaterThanOrEqualTo filter, Object extraData)
Object	visit(PropertyIsLessThan filter, Object extraData)
Object	visit(PropertyIsLessThanOrEqualTo filter, Object extraData)
void	visit(PropertyIsLike filter)
Object	visit(PropertyIsLike filter, Object extraData)
Object	visit(PropertyIsNil filter, Object extraData)
Object	visit(PropertyIsNotEqualTo filter, Object extraData)
void	visit(PropertyIsNull filter)
Object	visit(PropertyIsNull filter, Object extraData)
Object	visit(TContains contains, Object extraData)
Object	visit(TEquals equals, Object extraData)
Object	visit(Touches filter, Object extraData)
Object	visit(TOverlaps contains, Object extraData)
Object	visit(Within filter, Object extraData)
protected void	visitCompareFilter(Filter filter)
protected void	visitGeometryFilter(SpatialOperator filter)
protected void	visitLogicFilter(Filter filter)
void	visitLogicFilter(Not filter)
Object	visitNullFilter(Object extraData) Used to account for a null filter value.
protected Object	visitTemporalFilter(BinaryTemporalOperator filter)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface FilterVisitor

visit

Constructor Detail

FilterEncodingPreProcessor

public FilterEncodingPreProcessor(Integer complianceLevel)

Method Detail

getFidFilter

public Id getFidFilter()

Gets the fid filter that contains all the fids.

Returns:

the fid filter that contains all the fids.

getFilter

public Filter getFilter()

Returns the filter that can be encoded.

Returns:

the filter that can be encoded.

visit

public void visit(Filter filter)

visit

public void visit(PropertyIsBetween filter)

visit

public void visit(BinaryComparisonOperator filter)

visit

public void visit(Not filter)

visit

public void visit(BinarySpatialOperator filter)

visit

public void visit(PropertyIsLike filter)

visitLogicFilter

public void visitLogicFilter(Not filter)

visit

public void visit(BinaryLogicOperator filter)

visit

public void visit(PropertyIsNull filter)

visit

public void visit(Id filter)

visit

public void visit(IncludeFilter filter)

visit

public void visit(ExcludeFilter filter)

requiresPostProcessing

public boolean requiresPostProcessing()

Returns true if the filter was one where the request to the server is more general than the actual filter. See XMLHandlerHints.VALUE_FILTER_COMPLIANCE_MEDIUM and example of when this can happen.

Returns:

true if the filter was one where the request to the server is more general than the actual filter.

visitLogicFilter

protected void visitLogicFilter(Filter filter)

visitCompareFilter

protected void visitCompareFilter(Filter filter)

visitGeometryFilter

protected void visitGeometryFilter(SpatialOperator filter)

visit

public Object visit(And filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Id filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visitNullFilter

public Object visitNullFilter(Object extraData)

Description copied from interface: FilterVisitor

Used to account for a null filter value.

This is particularly used during data structure transofrmations, however the use of null is not recommended. Please make use of Filter.NONE and Filter.ALL as placeholder objects that communicate intent.

Specified by:

visitNullFilter in interface FilterVisitor

Parameters:

extraData - Value object provided to visitor

Returns:

subclass defined

visit

public Object visit(IncludeFilter filter,
                    Object extraData)

Description copied from interface: FilterVisitor

Visit Filter.INCLUDE (often used during data structure transformations).

Specified by:

visit in interface FilterVisitor

Parameters:

filter - Filter.INCLUDE.

extraData - Value object provided to visitor

Returns:

subclass supplied

visit

public Object visit(ExcludeFilter filter,
                    Object extraData)

Description copied from interface: FilterVisitor

Visit Filter.EXCLUDE (often used during data structure transformations).

Specified by:

visit in interface FilterVisitor

Parameters:

filter - Filter.EXCLUDE.

extraData - Value object provided to visitor

Returns:

subclass supplied

visit

public Object visit(Not filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Or filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsBetween filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsEqualTo filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsNotEqualTo filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsGreaterThan filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsGreaterThanOrEqualTo filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsLessThan filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsLessThanOrEqualTo filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsLike filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsNull filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(PropertyIsNil filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(BBOX filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Beyond filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Contains filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Crosses filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Disjoint filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(DWithin filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Equals filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Intersects filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Overlaps filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Touches filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Within filter,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(After after,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(AnyInteracts anyInteracts,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Before before,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Begins begins,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(BegunBy begunBy,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(During during,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(EndedBy endedBy,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Ends ends,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(Meets meets,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(MetBy metBy,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(OverlappedBy overlappedBy,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(TContains contains,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(TEquals equals,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visit

public Object visit(TOverlaps contains,
                    Object extraData)

Specified by:

visit in interface FilterVisitor

visitTemporalFilter

protected Object visitTemporalFilter(BinaryTemporalOperator filter)