package org.mongodb.morphia.annotations;


import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;


Annotation which helps migrate schemas by loading one of several possible properties in the document into fields or methods.  This is
typically used when a field is renamed, allowing the field to be populated by both its current name and any prior names.

When placed on a field, the additional names (document field) will be checked when this field is loaded.  If the document contains data
for more than one of the names, an exception will be thrown. (orig @author Jeff Schnitzer  for Objectify)
Author:
Scott Hernandez/**
 * <p>Annotation which helps migrate schemas by loading one of several possible properties in the document into fields or methods.  This is
 * typically used when a field is renamed, allowing the field to be populated by both its current name and any prior names.</p>
 * <p/>
 * When placed on a field, the additional names (document field) will be checked when this field is loaded.  If the document contains data
 * for more than one of the names, an exception will be thrown. (orig @author Jeff Schnitzer <jeff@infohazard.org> for Objectify)
 *
 * @author Scott Hernandez
 */

@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.FIELD})
public @interface AlsoLoad {
    
An array of alternative fields to load should the primary field name be missing in a document.
/**
     * An array of alternative fields to load should the primary field name be missing in a document.
     */
    String[] value();
}