[hibernate-issues] [Hibernate-JIRA] Created: (HHH-3794) Issue when method return type is Interface

[Amar Singh (JIRA)]

Issue when method return type is Interface
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                 Key: HHH-3794
                 URL: http://opensource.atlassian.com/projects/hibernate/browse/HHH-3794
             Project: Hibernate Core
          Issue Type: Bug
          Components: envers
            Reporter: Amar Singh


I came across this problem while using Hibernate-envers-3.4-SNAPSHOT with Hibernate-3.3.GA or Hibernate-3.4-SNAPSHOT. Below is my hbm.xml file:

Code:

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping default-lazy="false" package="com.xyz.fwk.persistence.hibernate.impl.bug.demo.test">
    <class name="Trade" table="trade" batch-size="64" lazy="false">
	    <id name="id" type="int" access="field">
	       <generator class="native"></generator>
	    </id>      
 		<component name="tradeId" class="TypeIdentifier">
    			<property name="id" column="TRADE_ID"/>
    			<property name="type" column="TRADE_ID_TYPE"/>
     	</component>   
    </class>
</hibernate-mapping>
	



My class definition for Trade is:



Code:

@Audited (this doesn't matter)
public class Trade implements Serializable {
	protected int id;
	protected ITypeIdentifier tradeId ; 
	public Trade() { }
	public ITypeIdentifier getTradeId() {  return tradeId; }
	public void setTradeId(ITypeIdentifier i) { tradeId =i ; }
}
	



Since the getTradeId returns and ITypeIdentifier which is an interface, (hence has no super class) the method addPropertiesFromClass(XClass clazz) in org.hibernate.envers.configuration.metadata.reader.AuditedPropertiesReader

when trying to analyze ITypeIdentifier fails because the interface has no super class !

Code:

	private void addPropertiesFromClass(XClass clazz)  {
		XClass superclazz = clazz.getSuperclass();

(super class will be null for an interface return type )

		if (!"java.lang.Object".equals(superclazz.getName())) {
			addPropertiesFromClass(superclazz);
		}

		addFromProperties(clazz.getDeclaredProperties("field"), "field", fieldAccessedPersistentProperties);
		addFromProperties(clazz.getDeclaredProperties("property"), "property", propertyAccessedPersistentProperties);
	}
	

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