org.geotools.filter
Interface NullFilter

All Superinterfaces:

Filter, org.opengis.filter.Filter, FilterType, org.opengis.filter.PropertyIsNull

All Known Implementing Classes:

NullFilterImpl

public interface NullFilter

extends Filter, org.opengis.filter.PropertyIsNull

Defines a null filter, which checks to see if an attribute is null.

Version:

$Id: NullFilter.java 18021 2006-02-14 20:36:18Z jdeolive $

Author:

Rob Hranac, Vision for New York, Chris Holmes, TOPP

Field Summary

Fields inherited from interface org.geotools.filter.Filter

ALL, NONE

Fields inherited from interface org.geotools.filter.FilterType

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, NULL

Method Summary

boolean	contains(Feature feature) Deprecated. use org.opengis.filter.Filter#evaluate(Feature)
Expression	getNullCheckValue() Deprecated. use PropertyIsNull.getExpression()
void	nullCheckValue(Expression nullCheck) Deprecated. use PropertyIsNull.setExpression(Expression)

Methods inherited from interface org.geotools.filter.Filter

accept, and, evaluate, getFilterType, not, or

Methods inherited from interface org.opengis.filter.Filter

accept, evaluate

Methods inherited from interface org.opengis.filter.PropertyIsNull

getExpression, setExpression

Method Detail

nullCheckValue

public void nullCheckValue(Expression nullCheck)
                    throws IllegalFilterException

Deprecated. use PropertyIsNull.setExpression(Expression)

Determines whether or not a given feature is 'inside' this filter.

Parameters:

nullCheck - The attribute expression to null check.

Throws:

IllegalFilterException - If attempting to add a non-attribute expression.

Task:

REVISIT: change arg to AttributeExpression?, REVISIT: change name to setNullCheckValue.

getNullCheckValue

public Expression getNullCheckValue()

Deprecated. use PropertyIsNull.getExpression()

Returns the expression being checked for null.

Returns:

the Expression to null check.

contains

public boolean contains(Feature feature)

Deprecated. use org.opengis.filter.Filter#evaluate(Feature)

Determines whether or not a given feature is null for the nullCheck attribute.

Specified by:

contains in interface Filter

Parameters:

feature - Specified feature to examine.

Returns:

Flag confirming whether or not this feature is inside the filter.