Notice: This Wiki is now read only and edits are no longer possible. Please see: https://gitlab.eclipse.org/eclipsefdn/helpdesk/-/wikis/Wiki-shutdown-plan for the plan.
Difference between revisions of "EclipseLink/UserGuide/MOXy/Relationships/Privately Owned/One-to-Many"
m |
m |
||
Line 39: | Line 39: | ||
[[Image:Ccxm.gif|XML Composite Collection Mapping]]<br><br> | [[Image:Ccxm.gif|XML Composite Collection Mapping]]<br><br> | ||
− | + | ||
+ | == With Java== | ||
+ | '''''Java for XML Composite Collection Mapping for a Collection Attribute''''' <source lang="java"> | ||
XMLCompositeCollectionMapping phoneNumbersMapping = new XMLCompositeCollectionMapping(); | XMLCompositeCollectionMapping phoneNumbersMapping = new XMLCompositeCollectionMapping(); | ||
phoneNumbersMapping.setAttributeName("phoneNumbers"); | phoneNumbersMapping.setAttributeName("phoneNumbers"); | ||
Line 46: | Line 48: | ||
</source> | </source> | ||
− | + | '''''Java for XML Composite Collection Mapping for a Map Attribute''''' <source lang="java"> | |
XMLCompositeCollectionMapping phoneNumbersMapping = new XMLCompositeCollectionMapping(); | XMLCompositeCollectionMapping phoneNumbersMapping = new XMLCompositeCollectionMapping(); | ||
phoneNumbersMapping.setAttributeName("phoneNumbers"); | phoneNumbersMapping.setAttributeName("phoneNumbers"); | ||
Line 54: | Line 56: | ||
</source> | </source> | ||
− | + | == With EclipseLink Annotations == | |
Use the '''@OneToMany''' annotation: | Use the '''@OneToMany''' annotation: | ||
<source lang="java"> | <source lang="java"> |
Revision as of 12:07, 10 December 2010
EclipseLink | |
Website | |
Download | |
Community | |
Mailing List • Forums • IRC • mattermost | |
Issues | |
Open • Help Wanted • Bug Day | |
Contribute | |
Browse Source |
One-to-Many Composite Collection Mapping
Use XML composite collection mappings to represent one-to-many relationships. Composite collection XML mappings can reference any class that has an EclipseLink descriptor. The attribute in the object mapped must implement either the Java Collection interface (for example, Vector or HashSet) or Map interface (for example, Hashtable or TreeMap). The CompositeCollectionMapping class allows a reference to the mapped class and the indexing type for that class.
Given the XML schema in this example, XML Composite Collection Mapping illustrates an XML composite collection mapping to different elements by position in a corresponding XML document. Java for XML Composite Collection Mapping for a Collection Attribute shows how to configure this mapping in Java for a Collection attribute and Java for XML Composite Collection Mapping for a Map Attribute shows how to configure this mapping in Java for a Map attribute.
Schema for XML Composite Collection Mapping
<?xml version="1.0" encoding="UTF-8"?> <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <xsd:element name="customer" type="customer-type"/> <xsd:complexType name="customer-type"> <xsd:sequence> <xsd:element name="first-name" type="xsd:string"/> <xsd:element name="last-name" type="xsd:string"/> <xsd:element name="phone-number"> <xsd:complexType> <xsd:sequence> <xsd:element name="number" type="xsd:string"/> </xsd:sequence> <xsd:attribute name="type" type="xsd:string"/> </xsd:complexType> </xsd:element> </xsd:sequence> </xsd:complexType> </xsd:schema>
<span id="Figure_58-27" /> XML Composite Collection Mapping
With Java
Java for XML Composite Collection Mapping for a Collection AttributeXMLCompositeCollectionMapping phoneNumbersMapping = new XMLCompositeCollectionMapping(); phoneNumbersMapping.setAttributeName("phoneNumbers"); phoneNumbersMapping.setXPath("phone-number"); phoneNumbersMapping.setReferenceClass(PhoneNumber.class);
XMLCompositeCollectionMapping phoneNumbersMapping = new XMLCompositeCollectionMapping(); phoneNumbersMapping.setAttributeName("phoneNumbers"); phoneNumbersMapping.setXPath("phone-number"); phoneNumbersMapping.setReferenceClass(PhoneNumber.class); phoneNumbersMapping.useMapClass(HashMap.class, "getType");
With EclipseLink Annotations
Use the @OneToMany annotation:
@Entity public class Employee { @OneToMany(mappedBy="contact") private List<PhoneNumber> contactNumber; }
Use the EclipseLink extension @XmlInverseReference to map the back-pointer:
@Entity public class PhoneNumber { @ManyToOne @JoinColumn(name="E_ID", referencedColumnName = "E_ID") @XmlInverseReference(mappedBy="contactNumber") private Employee contact; }
|
|
|
EclipseLink Home MOXy User Guide: Table of Contents, Search | ||
How to contribute to this guide... |