org.hibernate.property.IndexPropertyAccessor Maven / Gradle / Ivy
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//$Id: IndexPropertyAccessor.java 7516 2005-07-16 22:20:48Z oneovthafew $
package org.hibernate.property;
import java.lang.reflect.Method;
import java.util.Map;
import org.hibernate.HibernateException;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.engine.SessionFactoryImplementor;
/**
* Represents a "back-reference" to the index of a collection.
*
* @author Gavin King
*/
public class IndexPropertyAccessor implements PropertyAccessor {
private final String propertyName;
private final String entityName;
/**
* Constructs a new instance of IndexPropertyAccessor.
*
* @param collectionRole The collection role which this back ref references.
*/
public IndexPropertyAccessor(String collectionRole, String entityName) {
this.propertyName = collectionRole.substring( entityName.length()+1 );
this.entityName = entityName;
}
public Setter getSetter(Class theClass, String propertyName) {
return new IndexSetter();
}
public Getter getGetter(Class theClass, String propertyName) {
return new IndexGetter();
}
/**
* The Setter implementation for index backrefs.
*/
public static final class IndexSetter implements Setter {
public Method getMethod() {
return null;
}
public String getMethodName() {
return null;
}
public void set(Object target, Object value) {
// do nothing...
}
public void set(Object target, Object value, SessionFactoryImplementor factory) throws HibernateException {
// do nothing...
}
}
/**
* The Getter implementation for index backrefs.
*/
public class IndexGetter implements Getter {
public Object getForInsert(Object target, Map mergeMap, SessionImplementor session) throws HibernateException {
if (session==null) {
return BackrefPropertyAccessor.UNKNOWN;
}
else {
return session.getPersistenceContext()
.getIndexInOwner(entityName, propertyName, target, mergeMap);
}
}
public Object get(Object target) {
return BackrefPropertyAccessor.UNKNOWN;
}
public Method getMethod() {
return null;
}
public String getMethodName() {
return null;
}
public Class getReturnType() {
return Object.class;
}
}
}