Package org.geotools.filter

Class DefaultExpression

Object

ExpressionAbstract

DefaultExpression

All Implemented Interfaces:

Expression

Direct Known Subclasses:

AttributeExpressionImpl, ClassificationFunction, FunctionExpressionImpl, LiteralExpressionImpl, MathExpressionImpl

public abstract class DefaultExpression
extends ExpressionAbstract

Implements a default expression, with helpful variables and static methods.

Author:

Rob Hranac, Vision for New York

Field Summary

Fields inherited from interface Expression

NIL

Constructor Summary

Constructors

Constructor	Description
DefaultExpression()

Method Summary

Modifier and Type	Method	Description
protected static boolean	isAttributeExpression(short expressionType)	Checks to see if passed type is attribute.
static boolean	isExpression(short expressionType)	Checks to see if passed type is geometry.
protected static boolean	isFunctionExpression(short expressionType)
protected static boolean	isGeometryExpression(short expressionType)	Checks to see if passed type is geometry.
protected static boolean	isLiteralExpression(short expressionType)	Checks to see if passed type is geometry.
protected static boolean	isMathExpression(short expressionType)	Checks to see if passed type is math.

Methods inherited from class ExpressionAbstract

evaluate, evaluate

Methods inherited from class Object

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

Methods inherited from interface Expression

accept

Constructor Detail

DefaultExpression

public DefaultExpression()

Method Detail

isAttributeExpression

protected static boolean isAttributeExpression(short expressionType)

Checks to see if passed type is attribute.

Parameters:

expressionType - Type of expression for check.

Returns:

Whether or not this is an attribute expression type.

isMathExpression

protected static boolean isMathExpression(short expressionType)

Checks to see if passed type is math.

Parameters:

expressionType - Type of expression for check.

Returns:

Whether or not this is a math expression type.

isLiteralExpression

protected static boolean isLiteralExpression(short expressionType)

Checks to see if passed type is geometry.

Parameters:

expressionType - Type of expression for check.

Returns:

Whether or not this is a geometry expression type.

isGeometryExpression

protected static boolean isGeometryExpression(short expressionType)

Checks to see if passed type is geometry.

Parameters:

expressionType - Type of expression for check.

Returns:

Whether or not this is a geometry expression type.

isExpression

public static boolean isExpression(short expressionType)

Checks to see if passed type is geometry.

Parameters:

expressionType - Type of expression for check.

Returns:

Whether or not this is a geometry expression type.

isFunctionExpression

protected static boolean isFunctionExpression(short expressionType)