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EclipseLink 2.3.2, build 'v20111125-r10461' API Reference | ||||||||
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java.lang.Objectjava.lang.Enum<FetchType>
javax.persistence.FetchType
public enum FetchType
Defines strategies for fetching data from the database.
The EAGER
strategy is a requirement on the persistence
provider runtime that data must be eagerly fetched. The
LAZY
strategy is a hint to the persistence provider
runtime that data should be fetched lazily when it is
first accessed. The implementation is permitted to eagerly
fetch data for which the LAZY
strategy hint has been
specified.
Example: @Basic(fetch=LAZY) protected String getName() { return name; }
Basic
,
ElementCollection
,
ManyToMany
,
OneToMany
,
ManyToOne
,
OneToOne
Enum Constant Summary | |
---|---|
EAGER
Defines that data must be eagerly fetched. |
|
LAZY
Defines that data can be lazily fetched. |
Method Summary | |
---|---|
static FetchType |
valueOf(java.lang.String name)
Returns the enum constant of this type with the specified name. |
static FetchType[] |
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 |
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getClass, notify, notifyAll, wait, wait, wait |
Enum Constant Detail |
---|
public static final FetchType LAZY
public static final FetchType EAGER
Method Detail |
---|
public static FetchType[] values()
for (FetchType c : FetchType.values()) System.out.println(c);
public static FetchType valueOf(java.lang.String name)
name
- the name of the enum constant to be returned.
java.lang.IllegalArgumentException
- if this enum type has no constant
with the specified name
java.lang.NullPointerException
- if the argument is null
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EclipseLink 2.3.2, build 'v20111125-r10461' API Reference | ||||||||
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