Module com.speedment.runtime.compute

Package com.speedment.runtime.compute.expression

Enum NonNullableExpression.NullStrategy

java.lang.Object

java.lang.Enum<NonNullableExpression.NullStrategy>

com.speedment.runtime.compute.expression.NonNullableExpression.NullStrategy

All Implemented Interfaces:

Serializable, Comparable<NonNullableExpression.NullStrategy>

Enclosing interface:

NonNullableExpression<T,INNER extends Expression<T>>

public static enum NonNullableExpression.NullStrategy
extends Enum<NonNullableExpression.NullStrategy>

The strategies possible when dealing with null-values.

Enum Constant Summary

Enum Constants

Enum Constant	Description
APPLY_DEFAULT_METHOD	Whenever the inner expression returns a null value, the other expression will be invoked to determine the value instead.
THROW_EXCEPTION	Whenever the inner expression returns a null value, a NullPointerException is thrown.
USE_DEFAULT_VALUE	Whenever the inner expression returns a null value, a specific constant value will be returned by this expression.

Method Summary

Modifier and Type	Method	Description
static NonNullableExpression.NullStrategy	valueOf(String name)	Returns the enum constant of this type with the specified name.
static NonNullableExpression.NullStrategy[]	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

USE_DEFAULT_VALUE

public static final NonNullableExpression.NullStrategy USE_DEFAULT_VALUE

Whenever the inner expression returns a null value, a specific constant value will be returned by this expression. If this strategy is used, then the class should also implement the corresponding To__OrElseExpression depending on the type.

APPLY_DEFAULT_METHOD

public static final NonNullableExpression.NullStrategy APPLY_DEFAULT_METHOD

Whenever the inner expression returns a null value, the other expression will be invoked to determine the value instead. If this strategy is used, then the class should also implement OrElseGetExpression.

THROW_EXCEPTION

public static final NonNullableExpression.NullStrategy THROW_EXCEPTION

Whenever the inner expression returns a null value, a NullPointerException is thrown. If this strategy is used, then the class should also implement OrElseThrowExpression.

Method Detail

values

public static NonNullableExpression.NullStrategy[] 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 (NonNullableExpression.NullStrategy c : NonNullableExpression.NullStrategy.values())
    System.out.println(c);

Returns:

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

valueOf

public static NonNullableExpression.NullStrategy 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