Package org.geotools.api.filter.expression

Interface Literal

All Superinterfaces:
Expression
All Known Implementing Classes:
ConstantExpression, LiteralExpressionImpl, OverlapBehaviorImpl
public interface Literal extends Expression
Instances of this interface provide a constant, literal value that can be used in expressions.

The evaluate method of this class must return the same value as getValue().

It should be noted that content of getValue() may be persisted with with XML based technologies. As an example a geoapi Geometry may be written out uding GML3, while a JTS Geometry may be written out using GML2. You should not assume that the same instance will be made available to all callers, please limit your self to pure data objects and don't use Literal to pass state or operations between systems.

Since:
GeoAPI 2.0
Author:
Chris Dillard (SYS Technologies)

  • Field Summary

    Fields inherited from interface Expression

    NIL

  • Method Summary

    Modifier and Type
    Method
    Description
    Object
    getValue()
    Returns the constant value held by this object.

    Methods inherited from interface Expression

    accept, evaluate, evaluate

  • Method Details

    • getValue

      Object getValue()
      Returns the constant value held by this object.