org.deegree.feature.persistence.sql.rules
Class Mapping

java.lang.Object
  org.deegree.feature.persistence.sql.rules.Mapping

Direct Known Subclasses:

CompoundMapping, ConstantMapping, FeatureMapping, GeometryMapping, PrimitiveMapping

public abstract class Mapping
extends Object

A Mapping describes how a particle of a feature type is mapped to a relational model (tables/columns).

The mapping is defined by identifying a relative XPath-expression in the feature model with a column mapping/join rule in the relational model.

Version:

$Revision: 31658 $, $Date: 2011-08-25 20:09:40 +0200 (Thu, 25 Aug 2011) $

Author:

Markus Schneider, last edited by: $Author: mschneider $

Constructor Summary

protected

Mapping(ValueReference path, boolean voidable, List<TableJoin> tableChange) Creates a new Mapping instance.

Method Summary

List<TableJoin>	getJoinedTable() Returns the table joins that have to be performed in the relational model to follow the particle path.
ValueReference	getPath() Returns a relative XPath-expression that describes the path from the parent particle to the particle(s) that are affected by this rule.
boolean	isVoidable() Returns whether the particle can be omitted from the parent particle without violating the schema.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Mapping

protected Mapping(ValueReference path,
                  boolean voidable,
                  List<TableJoin> tableChange)

Creates a new Mapping instance.

Parameters:

path - relative xpath expression, must not be null

voidable - true, if the particle can be omitted from the parent particle (i.e. be null), false otherwise

tableChange - table joins, can be null (no joins involved)

Method Detail

getPath

public ValueReference getPath()

Returns a relative XPath-expression that describes the path from the parent particle to the particle(s) that are affected by this rule.

Returns:

a relative xpath expression, never null

isVoidable

public boolean isVoidable()

Returns whether the particle can be omitted from the parent particle without violating the schema.

Returns:

true, if the particle can be omitted from the parent particle (i.e. be null), false otherwise

getJoinedTable

public List<TableJoin> getJoinedTable()

Returns the table joins that have to be performed in the relational model to follow the particle path.

Returns:

the table joins, can be null (no joins involved)

toString

public String toString()

Overrides:

toString in class Object