Package org.geotools.filter.expression

Class SimpleFeaturePropertyAccessorFactory

Object

SimpleFeaturePropertyAccessorFactory

All Implemented Interfaces:

PropertyAccessorFactory

public class SimpleFeaturePropertyAccessorFactory
extends Object
implements PropertyAccessorFactory

Creates a property accessor for simple features.

The created accessor handles a small subset of xpath expressions, a non-nested "name" which corresponds to a feature attribute, and "@id", corresponding to the feature id.

THe property accessor may be run against SimpleFeature, or against SimpleFeature. In the former case the feature property value is returned, in the latter the feature property type is returned.

Author:

Justin Deoliveira, The Open Planning Project

Field Summary

Fields

Modifier and Type	Field	Description
static PropertyAccessor	ATTRIBUTE_ACCESS	Single instance is fine - we are not stateful
static PropertyAccessor	DEFAULT_GEOMETRY_ACCESS
static String	DEFAULT_GEOMETRY_NAME	Conventional property name used to indicate the "efault gedometry" of a feature, that is, the one returned by Feature.getDefaultGeometryProperty() or {@link SimpleFeature.getDefaultGeometry()}.
static PropertyAccessor	FID_ACCESS

Fields inherited from interface PropertyAccessorFactory

NAMESPACE_CONTEXT

Constructor Summary

Constructors

Constructor	Description
SimpleFeaturePropertyAccessorFactory()

Method Summary

Modifier and Type	Method	Description
PropertyAccessor	createPropertyAccessor(Class type, String xpath, Class target, Hints hints)	Creates a property accessor for a particular class.

Methods inherited from class Object

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

Field Detail

ATTRIBUTE_ACCESS

public static final PropertyAccessor ATTRIBUTE_ACCESS

Single instance is fine - we are not stateful

DEFAULT_GEOMETRY_ACCESS

public static final PropertyAccessor DEFAULT_GEOMETRY_ACCESS

FID_ACCESS

public static final PropertyAccessor FID_ACCESS

DEFAULT_GEOMETRY_NAME

public static final String DEFAULT_GEOMETRY_NAME

Conventional property name used to indicate the "efault gedometry" of a feature, that is, the one returned by Feature.getDefaultGeometryProperty() or {@link SimpleFeature.getDefaultGeometry()}.

See Also:

Constant Field Values

Constructor Detail

SimpleFeaturePropertyAccessorFactory

public SimpleFeaturePropertyAccessorFactory()

Method Detail

createPropertyAccessor

public PropertyAccessor createPropertyAccessor(Class type,
                                               String xpath,
                                               Class target,
                                               Hints hints)

Description copied from interface: PropertyAccessorFactory

Creates a property accessor for a particular class.

Specified by:

createPropertyAccessor in interface PropertyAccessorFactory

Parameters:

type - The type of object to be accessed.

xpath - The xpath expression to evaluate.

target - The kind of result we are expecting (ie Geometry)

hints - Hints to be used when creatign the accessor.

Returns:

The property accessor, or null if this factory cannot create an accessor for the specified type.