org.geotools.data.complex.filter

Class FeatureChainedAttributeVisitor.FeatureChainLink

Object

FeatureChainedAttributeVisitor.FeatureChainLink

Enclosing class:

FeatureChainedAttributeVisitor

public static class FeatureChainedAttributeVisitor.FeatureChainLink
extends Object

Represents a single link in the "chain" of feature types that need to be linked to go from the root type to a nested attribute.

The class is public as its purpose is to convey information to clients, but instantiation and manipulation of its internal state is private.

Author:

Stefano Costa, GeoSolutions

Method Summary

Modifier and Type	Method and Description
String	getAlias() Unique identifier of a link in the chain; mainly useful when SQL encoding the feature chained attribute.
FeatureTypeMapping	getFeatureTypeMapping() Gets the mapping configuration of the linked feature type.
NestedAttributeMapping	getNestedFeatureAttribute() Gets the mapping configuration of the attribute holding the next nested feature in the chain.
<T extends NestedAttributeMapping> T	getNestedFeatureAttribute(Class<T> attributeMappingClass) Gets the mapping configuration of the attribute holding the next nested feature in the chain, cast to the specified NestedAttributeMapping subclass.
boolean	hasNestedFeature() Returns true if this link refers to a nested feature type which in turn contains another nested feature.
boolean	isChainingByReference() Returns true if this FeatureChainedAttributeVisitor.FeatureChainLink instance represents a chaining-by-reference mapping, i.e. nested feature is not fully encoded inline, only xlink:href attribute is set.
boolean	isJoiningNestedMapping() Returns true if joining support is enabled for the nested attribute mapping.
FeatureChainedAttributeVisitor.FeatureChainLink	next() Returns the next link in the chain.
FeatureChainedAttributeVisitor.FeatureChainLink	previous() Returns the previous link in the chain.

Methods inherited from class Object

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

Method Detail

getFeatureTypeMapping

public FeatureTypeMapping getFeatureTypeMapping()

Gets the mapping configuration of the linked feature type.

Returns:

the linked feature type mapping

getNestedFeatureAttribute

public NestedAttributeMapping getNestedFeatureAttribute()

Gets the mapping configuration of the attribute holding the next nested feature in the chain.

Returns:

the nested attribute mapping, or null if there are no more nested features in the chain

getNestedFeatureAttribute

public <T extends NestedAttributeMapping> T getNestedFeatureAttribute(Class<T> attributeMappingClass)

Gets the mapping configuration of the attribute holding the next nested feature in the chain, cast to the specified NestedAttributeMapping subclass.

Parameters:

attributeMappingClass - the NestedAttributeMapping subclass to cast to

See Also:

getNestedFeatureAttribute()

isChainingByReference

public boolean isChainingByReference()

Returns true if this FeatureChainedAttributeVisitor.FeatureChainLink instance represents a chaining-by-reference mapping, i.e. nested feature is not fully encoded inline, only xlink:href attribute is set.

Returns:

true if this is chaining by reference, false otherwise

isJoiningNestedMapping

public boolean isJoiningNestedMapping()

Returns true if joining support is enabled for the nested attribute mapping.

Returns:

true if joining support is enabled for this chain link, false otherwise

hasNestedFeature

public boolean hasNestedFeature()

Returns true if this link refers to a nested feature type which in turn contains another nested feature.

Returns:

true if there is another nested feature in the chain, false otherwise

getAlias

public String getAlias()

Unique identifier of a link in the chain; mainly useful when SQL encoding the feature chained attribute.

Returns:

a unique identifier of the link

next

public FeatureChainedAttributeVisitor.FeatureChainLink next()

Returns the next link in the chain.

Returns:

the next link, or null if none exists

previous

public FeatureChainedAttributeVisitor.FeatureChainLink previous()

Returns the previous link in the chain.

Returns:

the previous link, or null if none exists