Package org.geotools.data.complex.filter

Class FeatureChainedAttributeVisitor.FeatureChainLink

Object
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 Details

    • 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:

    • 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