public class FeatureChainedAttributeVisitor extends DefaultExpressionVisitor
FeatureTypeMapping
object to determine which nested feature types / attributes must be traversed
to reach the attribute identified by the provided PropertyName
expression.
The provided FeatureTypeMapping
object is regarded as the root mapping against which
the expression is evaluated.
The nested attribute mappings are returned as a list of FeatureChainedAttributeVisitor.FeatureChainLink
objects; the
first one in the list always refers to the root mapping.
Modifier and Type | Class and Description |
---|---|
static class |
FeatureChainedAttributeVisitor.FeatureChainedAttributeDescriptor
Descriptor class holding information about a feature chained attribute, i.e. an attribute
belonging to a feature type that is linked to a root feature type via feature chaining.
|
static class |
FeatureChainedAttributeVisitor.FeatureChainLink
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.
|
Constructor and Description |
---|
FeatureChainedAttributeVisitor(FeatureTypeMapping root) |
Modifier and Type | Method and Description |
---|---|
boolean |
conditionalMappingWasFound()
Tells clients whether or not a conditional mapping was found in the feature chain when the
latest expression was visited.
|
List<FeatureChainedAttributeVisitor.FeatureChainedAttributeDescriptor> |
getFeatureChainedAttributes()
Returns an object describing the sequence of feature chaining links that must be traversed to
reach the attribute specified by the visited expression.
|
protected boolean |
startsWith(XPathUtil.StepList one,
XPathUtil.StepList other) |
Object |
visit(PropertyName expression,
Object data) |
public FeatureChainedAttributeVisitor(FeatureTypeMapping root)
public Object visit(PropertyName expression, Object data)
visit
in interface ExpressionVisitor
visit
in class DefaultExpressionVisitor
public List<FeatureChainedAttributeVisitor.FeatureChainedAttributeDescriptor> getFeatureChainedAttributes()
null
if none was foundpublic boolean conditionalMappingWasFound()
true
if a conditional mapping was found in the feature chain, false
otherwiseprotected boolean startsWith(XPathUtil.StepList one, XPathUtil.StepList other)
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