Package org.geotools.filter
Class IsNilImpl
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- All Implemented Interfaces:
Filter
,MultiValuedFilter
,PropertyIsNil
,FilterType
public class IsNilImpl extends CompareFilterImpl implements PropertyIsNil
JD: PropertyIsNil requires us to return true if a property is "nil" in the xml schema sense. But we don't really have notion of schema in our filters. So for now we just make it an alias of PropertyIsNull. When someone (app-schema) has a need for this we can revisit.
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Nested Class Summary
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Nested classes/interfaces inherited from interface MultiValuedFilter
MultiValuedFilter.MatchAction
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Field Summary
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Fields inherited from class BinaryComparisonAbstract
expression1, expression2
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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
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Fields inherited from interface PropertyIsNil
NAME
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Constructor Summary
Constructors Constructor Description IsNilImpl(Expression e1, Object nilReason)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Object
accept(FilterVisitor visitor, Object extraData)
Used by FilterVisitors to perform some action on this filter instance.boolean
evaluate(Object object)
Give an object, this method determines if the test(s) represented by this filter object are passed.Expression
getExpression()
Returns the expression whose value will be checked fornull
.Object
getNilReason()
The nil reason.-
Methods inherited from class CompareFilterImpl
compare, equals, hashCode, setExpression1, setExpression2, toString
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Methods inherited from class BinaryComparisonAbstract
comparable, eval, eval, getExpression1, getExpression2, getMatchAction, isMatchingCase
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Methods inherited from class AbstractFilter
isCompareFilter, isGeometryDistanceFilter, isGeometryFilter, isLogicFilter, isMathFilter, isSimpleFilter
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Methods inherited from class FilterAbstract
accepts, eval, eval
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Constructor Detail
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IsNilImpl
public IsNilImpl(Expression e1, Object nilReason)
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Method Detail
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evaluate
public boolean evaluate(Object object)
Description copied from interface:Filter
Give an object, this method determines if the test(s) represented by this filter object are passed.This ability is used to allow Queries against both Features and and non spatial data (such as Record) and to express constraints on permissable data values.
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getExpression
public Expression getExpression()
Description copied from interface:PropertyIsNil
Returns the expression whose value will be checked fornull
.- Specified by:
getExpression
in interfacePropertyIsNil
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getNilReason
public Object getNilReason()
Description copied from interface:PropertyIsNil
The nil reason.- Specified by:
getNilReason
in interfacePropertyIsNil
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accept
public Object accept(FilterVisitor visitor, Object extraData)
Description copied from class:CompareFilterImpl
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 interfaceFilter
- Specified by:
accept
in classCompareFilterImpl
- Parameters:
visitor
- The visitor which requires access to this filter, the method must call visitor.visit(this);
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