org.deegree.model.filterencoding
Class PropertyName

java.lang.Object
  org.deegree.model.filterencoding.Expression
      org.deegree.model.filterencoding.PropertyName

public class PropertyName
extends Expression

Encapsulates the information of a PropertyName element.

Version:

$Revision: 7862 $, $Date: 2007-07-26 17:11:11 +0200 (Do, 26 Jul 2007) $

Author:

Markus Schneider, last edited by: $Author: jmays $

Field Summary

Fields inherited from class org.deegree.model.filterencoding.Expression

id

Constructor Summary

PropertyName(PropertyPath value)
Creates a new instance of PropertyName.

PropertyName(QualifiedName elementName)
Creates a new instance of PropertyName.

PropertyName(String value)
Deprecated. use #PropertyName(QualifiedName) instead

Method Summary

static Expression	buildFromDOM(Element element) Given a DOM-fragment, a corresponding Expression-object is built.
boolean	equals(Object other) Indicates whether some other object is "equal to" this one.
Object	evaluate(Feature feature) Returns the PropertyName's value (to be used in the evaluation of a complexer Expression).
PropertyPath	getValue() Returns the PropertyName's value.
void	setValue(PropertyPath value)
String	toString() Returns a string representation of the object.
StringBuffer	toXML() Produces an indented XML representation of this object.

Methods inherited from class org.deegree.model.filterencoding.Expression

getExpressionId, getExpressionName

Methods inherited from class java.lang.Object

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

Constructor Detail

PropertyName

@Deprecated
public PropertyName(String value)

Deprecated. use #PropertyName(QualifiedName) instead

Creates a new instance of PropertyName.

Parameters:

value -

PropertyName

public PropertyName(QualifiedName elementName)

Creates a new instance of PropertyName.

Parameters:

elementName -

PropertyName

public PropertyName(PropertyPath value)

Creates a new instance of PropertyName.

Parameters:

value -

Method Detail

buildFromDOM

public static Expression buildFromDOM(Element element)
                               throws FilterConstructionException

Given a DOM-fragment, a corresponding Expression-object is built.

Parameters:

element -

Returns:

the Expression object for the passed element

Throws:

FilterConstructionException - if the structure of the DOM-fragment is invalid

getValue

public PropertyPath getValue()

Returns the PropertyName's value.

Returns:

the PropertyName's value.

setValue

public void setValue(PropertyPath value)

Parameters:

value -

See Also:

getValue()

toXML

public StringBuffer toXML()

Produces an indented XML representation of this object.

Specified by:

toXML in class Expression

Returns:

XML representation of this object

evaluate

public Object evaluate(Feature feature)
                throws FilterEvaluationException

Returns the PropertyName's value (to be used in the evaluation of a complexer Expression). If the value is a geometry, an instance of Geometry is returned, if it appears to be numerical, a Double, else a String.

TODO: Improve datatype handling.

Specified by:

evaluate in class Expression

Parameters:

feature - that determines the value of this PropertyName

Returns:

the resulting value

Throws:

FilterEvaluationException - if the has no Property with a matching name

equals

public boolean equals(Object other)

Indicates whether some other object is "equal to" this one.

Overrides:

equals in class Object

Returns:

true if this object is the same as the obj argument; false otherwise

toString

public String toString()

Returns a string representation of the object.

Overrides:

toString in class Object

Returns:

a string representation of the object