com.blazebit.persistence.view

Enum FetchStrategy

java.lang.Object

java.lang.Enum<FetchStrategy>

com.blazebit.persistence.view.FetchStrategy

All Implemented Interfaces:

Serializable, Comparable<FetchStrategy>

public enum FetchStrategy
extends Enum<FetchStrategy>

The fetch strategy for an entity view attribute.

Since:

1.2.0

Author:

Christian Beikov

Enum Constant Summary

Enum Constants

Enum Constant and Description
JOIN A strategy that defines that the target elements are joined and fetched along in the source query.
SELECT A strategy that defines that the target elements are selected in separate queries.
SUBSELECT A strategy that defines that the target elements are selected in a single query containing the source query as subquery.

Method Summary

Modifier and Type	Method and Description
static FetchStrategy	valueOf(String name) Returns the enum constant of this type with the specified name.
static FetchStrategy[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

JOIN

public static final FetchStrategy JOIN

A strategy that defines that the target elements are joined and fetched along in the source query.

SELECT

public static final FetchStrategy SELECT

A strategy that defines that the target elements are selected in separate queries. Depending on the defined BatchFetch.size(), the query select multiple elements at once.

SUBSELECT

public static final FetchStrategy SUBSELECT

A strategy that defines that the target elements are selected in a single query containing the source query as subquery.

Method Detail

values

public static FetchStrategy[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (FetchStrategy c : FetchStrategy.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static FetchStrategy valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

IllegalArgumentException - if this enum type has no constant with the specified name

NullPointerException - if the argument is null