org.geotools.filter
Interface EnvironmentVariable
- All Superinterfaces:
- Expression, ExpressionType
- All Known Subinterfaces:
- MapScaleDenominator
- All Known Implementing Classes:
- MapScaleDenominatorImpl
public interface EnvironmentVariable
- extends Expression
Represents a reference to an environmental variable.
The environmental variables are expected to be "understood" by the service making
use of the Expression. As an example when evaluating an SLD file you can often
refer to an environmental variable "DPI", for details review the SLD specification.
- Author:
- James
- Module:
modules/library/api (gt-api.jar)
Fields inherited from interface ExpressionType |
ATTRIBUTE, ATTRIBUTE_DOUBLE, ATTRIBUTE_GEOMETRY, ATTRIBUTE_INTEGER, ATTRIBUTE_STRING, ATTRIBUTE_UNDECLARED, FUNCTION, LITERAL_DOUBLE, LITERAL_GEOMETRY, LITERAL_INTEGER, LITERAL_LONG, LITERAL_STRING, LITERAL_UNDECLARED, MATH_ADD, MATH_DIVIDE, MATH_MULTIPLY, MATH_SUBTRACT |
Fields inherited from interface Expression |
NIL |
Method Summary |
Object |
getValue(SimpleFeature feature)
Deprecated. use Expression.evaluate(Object) |
Methods inherited from interface Expression |
accept, evaluate, evaluate |
getValue
Object getValue(SimpleFeature feature)
- Deprecated. use
Expression.evaluate(Object)
- Gets the attribute value at the path held by this expression from the
feature.
- Parameters:
feature
- the feature to get this attribute from.
- Returns:
- the value of the attribute found by this expression.
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