Enum ExistenceType
- java.lang.Object
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- java.lang.Enum<ExistenceType>
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- org.eclipse.persistence.annotations.ExistenceType
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- All Implemented Interfaces:
Serializable
,Comparable<ExistenceType>
public enum ExistenceType extends Enum<ExistenceType>
An enum that is used within the ExistenceChecking annotation.- Since:
- EclipseLink 1.0
- Author:
- Guy Pelletier
- See Also:
ExistenceChecking
,DoesExistQuery
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Enum Constant Summary
Enum Constants Enum Constant Description ASSUME_EXISTENCE
Assume that if the objects primary key does not include null then it must exist.ASSUME_NON_EXISTENCE
Assume that the object does not exist.CHECK_CACHE
Assume that if the objects primary key does not include null and it is in the cache, then it must exist.CHECK_DATABASE
Perform does exist check on the database.
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Method Summary
All Methods Static Methods Concrete Methods Modifier and Type Method Description static ExistenceType
valueOf(String name)
Returns the enum constant of this type with the specified name.static ExistenceType[]
values()
Returns an array containing the constants of this enum type, in the order they are declared.
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Enum Constant Detail
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CHECK_CACHE
public static final ExistenceType CHECK_CACHE
Assume that if the objects primary key does not include null and it is in the cache, then it must exist.
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CHECK_DATABASE
public static final ExistenceType CHECK_DATABASE
Perform does exist check on the database.
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ASSUME_EXISTENCE
public static final ExistenceType ASSUME_EXISTENCE
Assume that if the objects primary key does not include null then it must exist. This may be used if the application guarantees or does not care about the existence check.
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ASSUME_NON_EXISTENCE
public static final ExistenceType ASSUME_NON_EXISTENCE
Assume that the object does not exist. This may be used if the application guarantees or does not care about the existence check. This will always force an insert to be called.
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Method Detail
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values
public static ExistenceType[] 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 (ExistenceType c : ExistenceType.values()) System.out.println(c);
- Returns:
- an array containing the constants of this enum type, in the order they are declared
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valueOf
public static ExistenceType 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 nameNullPointerException
- if the argument is null
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