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Difference between revisions of "EclipseLink/DesignDocs/293925/MOXyExtensions/XMLDirectMapping"
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=== The following information must be configurable via XML metadata === | === The following information must be configurable via XML metadata === | ||
<source lang="xml"> | <source lang="xml"> | ||
− | <xml-direct-mapping | + | <xml-direct-mapping xmlns="http://www.eclipse.org/eclipselink/xsds/persistence"> |
− | + | ||
<attribute-name>String</attribute-name> | <attribute-name>String</attribute-name> | ||
<read-only>false</read-only> | <read-only>false</read-only> |
Revision as of 12:58, 5 February 2010
XMLDirectMapping (page under construction)
Requirements
Provide support for XML direct mappings. The following structures are to be extended to support XML direct mapping configuration:
-
xml-attribute
-
xml-element
The following information must be configurable via XML metadata
<xml-direct-mapping xmlns="http://www.eclipse.org/eclipselink/xsds/persistence"> <attribute-name>String</attribute-name> <read-only>false</read-only> <get-method>String</get-method> <set-method>String</set-method> <properties> <property name="String"> <value>Text</value> </property> <property name="String"> <value>Text</value> </property> </properties> <field name="String"/> <null-value>String</null-value> <converter/> <attribute-classification>String</attribute-classification> <is-cdata>1</is-cdata> <null-policy> <xsi-nil-represents-null>false</xsi-nil-represents-null> <empty-node-represents-null>false</empty-node-represents-null> <null-representation-for-xml>XSI_NIL</null-representation-for-xml> </null-policy> </xml-direct-mapping>
Example: Attribute mapping
The following example will demonstrate how to configure an XML direct mapping for an attribute via XML metadata.
org.example.Employee.java
package org.example; public class Employee { public int empId; }
Deployment XML
<class-mapping-descriptor xsi:type="xml-class-mapping-descriptor"> <class>org.example.Employee</class> <alias>Employee</alias> <attribute-mappings> <attribute-mapping xsi:type="xml-direct-mapping"> <attribute-name>empId</attribute-name> <field name="@id" xsi:type="node"/> </attribute-mapping> </attribute-mappings> <descriptor-type>aggregate</descriptor-type> <default-root-element>employee</default-root-element> <default-root-element-field name="employee" xsi:type="node"/> </class-mapping-descriptor>
XML Metadata
org/example/eclipselink-oxm.xml
This XML file represents metadata overrides for the "org.example.Employee" class.
<?xml version="1.0" encoding="US-ASCII"?> <xml-bindings xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm"> <java-types> <java-type name="org.example.Employee"> <xml-root-element name="employee" /> <java-attributes> <xml-attribute java-attribute="empId" name="id" /> </java-attributes> </java-type> </java-types> </xml-bindings>