org.apache.openjpa.kernel.exps
Interface Path

All Superinterfaces:

Serializable, Value

public interface Path
extends Value

A path represents a traversal into fields of a candidate object. Equivalent paths should compare equal.

Author:

Abe White

Method Summary

void	get(FieldMetaData field, boolean nullTraversal) Traverse into the given field of the current object, and update the current object to that field value.
void	get(FieldMetaData fmd, XMLMetaData meta) Traverse into the given field that maps to xml column, and update the current object to that field value.
void	get(XMLMetaData meta, String name) Traverse into the gevin xpath name of the current object, and update the current object to that xpath field.
XMLMetaData	getXmlMapping() Return the current XPath's xmlmapping metadata.
FieldMetaData	last() Return the last field in the path, or null if the path does not not contain a final field.

Methods inherited from interface org.apache.openjpa.kernel.exps.Value

acceptVisit, getMetaData, getType, isAggregate, isVariable, isXPath, setImplicitType, setMetaData

Method Detail

get

void get(FieldMetaData field,
         boolean nullTraversal)

Traverse into the given field of the current object, and update the current object to that field value.

Parameters:

nullTraversal - if true, allow traversal through a null field

last

FieldMetaData last()

Return the last field in the path, or null if the path does not not contain a final field.

get

void get(FieldMetaData fmd,
         XMLMetaData meta)

Traverse into the given field that maps to xml column, and update the current object to that field value.

Parameters:

fmd - field maps to xml column

meta - associated xml mapping

get

void get(XMLMetaData meta,
         String name)

Traverse into the gevin xpath name of the current object, and update the current object to that xpath field.

Parameters:

meta -

name -

getXmlMapping

XMLMetaData getXmlMapping()

Return the current XPath's xmlmapping metadata.

Returns:

Return xmlmapping