org.geotools.filter.text.commons

Class ExpressionToText

Object

ExpressionToText

All Implemented Interfaces:

ExpressionVisitor

public class ExpressionToText
extends Object
implements ExpressionVisitor

This class is responsible to convert an expression to a CQL/ECQL valid expression.

Warning: This component is not published. It is part of module implementation. Client module should not use this feature.

Author:

Mauricio Pazos

Constructor Summary

Constructors

Constructor and Description
ExpressionToText() Default constructor.
ExpressionToText(boolean encodeEWKT) Builds an ExpressionToText

Method Summary

Modifier and Type	Method and Description
StringBuilder	dateToText(Date date, StringBuilder output) Uses the format yyyy-MM-dd'T'HH:mm:ss'[+|-]##:##' for output the provided date.
protected boolean	propertyNeedsDelimiters(PropertyName name)
Object	visit(Add expression, Object extraData)
Object	visit(Divide expression, Object extraData)
Object	visit(Function function, Object extraData)
Object	visit(Literal expression, Object extraData)
Object	visit(Multiply expression, Object extraData)
Object	visit(NilExpression expression, Object extraData) Used to visit a Expression.NIL, also called for null where an expression is expected.
Object	visit(PropertyName expression, Object extraData)
Object	visit(Subtract expression, Object extraData)

Methods inherited from class Object

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

Constructor Detail

ExpressionToText

public ExpressionToText()

Default constructor. The behavior of EWKT encoding is controlled by the Hints.ENCODE_EWKT hint

ExpressionToText

public ExpressionToText(boolean encodeEWKT)

Builds an ExpressionToText

Parameters:

encodeEWKT - When true, it will encode Geometry as EWKT when a CoordinateReferenceSystem object is found as the geometry user data

Method Detail

dateToText

public StringBuilder dateToText(Date date,
                                StringBuilder output)

Uses the format yyyy-MM-dd'T'HH:mm:ss'[+|-]##:##' for output the provided date.

Returns:

output

visit

public Object visit(NilExpression expression,
                    Object extraData)

Description copied from interface: ExpressionVisitor

Used to visit a Expression.NIL, also called for null where an expression is expected.

This is particularly useful when doing data transformations, as an example when using a StyleSymbolizer Expression.NIL can be used to represent the default stroke color.

Specified by:

visit in interface ExpressionVisitor

Returns:

implementation specific

visit

public Object visit(Add expression,
                    Object extraData)

Specified by:

visit in interface ExpressionVisitor

visit

public Object visit(Divide expression,
                    Object extraData)

Specified by:

visit in interface ExpressionVisitor

visit

public Object visit(Function function,
                    Object extraData)

Specified by:

visit in interface ExpressionVisitor

visit

public Object visit(Literal expression,
                    Object extraData)

Specified by:

visit in interface ExpressionVisitor

visit

public Object visit(Multiply expression,
                    Object extraData)

Specified by:

visit in interface ExpressionVisitor

visit

public Object visit(PropertyName expression,
                    Object extraData)

Specified by:

visit in interface ExpressionVisitor

propertyNeedsDelimiters

protected boolean propertyNeedsDelimiters(PropertyName name)

visit

public Object visit(Subtract expression,
                    Object extraData)

Specified by:

visit in interface ExpressionVisitor