01_sorting_simple.java

@Field(analyzed=Analyze.NO)
@SortField
public String getLastname() {
  return lastname;
}

02_sorting_explicit_field.java

@Fields({
  @Field,
  @Field(name="unanalyzed", analyzed=Analyze.NO)
})
@SortField(forField="unanalyzed")
public String getLastname() {
  return lastname;
}

03_custom_docvaluefield_name.java

@Field(analyzed=Analyze.NO)
@SortField(name="last_name_sort_field")
public String getLastname() {
  return lastname;
}

04_unindexed_field.java

// for a field which should be *sortable* but *not searchable* (it's unstored and unindexed ) I
// still need a field definition in my current local branch to get the value via the field 
// bridge; This field will not be added to the index itself,  only the doc value field used for 
// sorting will be added
@Field(analyzed=Analyze.NO, store=Store.NO, indexed=Index.NO)
@SortField
public String getLastname() {
  return lastname;
}

// Alternatively, one could add fieldBridge() / indexNullAs() to @SortField so one omit the field in that case:
@SortField(fieldBridge=MyFieldBridge.class)
public String getLastname() {
  return lastname;
}

SortField.java

/*
 * Hibernate Search, full-text search for your domain model
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */
package org.hibernate.search.annotations;

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

/**
 * Makes a property sortable.
 * <p>
 * A document field for that property must exist from which the field bridge configuration will be inherited. In the
 * rare case that a property should be sortable but not searchable, declare a field which is not indexed nor stored.
 * Then only the sort field will be added to the document, but no standard index field.
 *
 * @author Gunnar Morling
 */
@Retention(RetentionPolicy.RUNTIME)
@Target({ ElementType.METHOD, ElementType.FIELD })
@Documented
public @interface SortField {

	/**
	 * Name of the sort field in the index. Defaults to the name of the field upon which this sort field is based.
	 */
	String name() default "";

	/**
	 * Name of the document field whose field bridge to apply to obtain the value of this sort field. Can be omitted in
	 * case only a single field exists for the annotated property.
	 */
	String forField() default "";
}