org.geotools.filter
Class GeometryExpressionImpl

java.lang.Object
  org.geotools.filter.expression.ExpressionAbstract
      org.geotools.filter.DefaultExpression
          org.geotools.filter.GeometryExpressionImpl

All Implemented Interfaces:

org.opengis.filter.expression.Expression, Expression, ExpressionType

public class GeometryExpressionImpl

extends DefaultExpression

Defines a complex filter (could also be called logical filter). This filter holds one or more filters together and relates them logically in an internally defined manner.

Version:

$Id: GeometryExpressionImpl.java 18028 2006-02-15 10:53:47Z desruisseaux $

Author:

Rob Hranac, TOPP

Field Summary

protected java.lang.String	attPath Holds all sub filters of this filter.
protected java.lang.String	colName Holds all sub filters of this filter.

Fields inherited from class org.geotools.filter.DefaultExpression

expressionType, permissiveConstruction

Fields inherited from interface org.geotools.filter.expression.ExpressionType

ATTRIBUTE, ATTRIBUTE_DOUBLE, ATTRIBUTE_GEOMETRY, ATTRIBUTE_INTEGER, ATTRIBUTE_STRING, ATTRIBUTE_UNDECLARED, FUNCTION, LITERAL_DOUBLE, LITERAL_GEOMETRY, LITERAL_INTEGER, LITERAL_STRING, MATH_ADD, MATH_DIVIDE, MATH_MULTIPLY, MATH_SUBTRACT

Constructor Summary

protected

GeometryExpressionImpl(java.lang.String colName) Constructor with the schema for this attribute.

Method Summary

java.lang.Object	evaluate(Feature feature) Gets the value of this attribute from the passed feature.
java.lang.String	toString() Return this expression as a string.

Methods inherited from class org.geotools.filter.DefaultExpression

accept, evaluate, getType, getValue, isAttributeExpression, isExpression, isGeometryExpression, isLiteralExpression, isMathExpression, isMathExpression

Methods inherited from class org.geotools.filter.expression.ExpressionAbstract

accept, eval

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.opengis.filter.expression.Expression

accept

Field Detail

attPath

protected java.lang.String attPath

Holds all sub filters of this filter.

colName

protected java.lang.String colName

Holds all sub filters of this filter.

Constructor Detail

GeometryExpressionImpl

protected GeometryExpressionImpl(java.lang.String colName)

Constructor with the schema for this attribute.

Method Detail

evaluate

public java.lang.Object evaluate(Feature feature)

Gets the value of this attribute from the passed feature.

Specified by:

evaluate in interface Expression

Overrides:

evaluate in class DefaultExpression

Parameters:

feature - Feature from which to extract attribute value.

Returns:

The value of this expression based on the feature.

toString

public java.lang.String toString()

Return this expression as a string.

Returns:

String representation of this attribute expression.